/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ // Library class for particle pt and y distributions used for // muon spectrometer simulations. // To be used with AliGenParam. // The following particle typed can be simulated: // pi, K, phi, omega, eta, J/Psi, Upsilon, charm and beauty mesons. // // andreas.morsch@cern.ch // #include "TMath.h" #include "TRandom.h" #include "TDatabasePDG.h" #include "AliGenMUONlib.h" ClassImp(AliGenMUONlib) // // Pions Double_t AliGenMUONlib::PtPion(const Double_t *px, const Double_t* /*dummy*/) { // // PT-PARAMETERIZATION CDF, PRL 61(88) 1819 // POWER LAW FOR PT > 500 MEV // MT SCALING BELOW (T=160 MEV) // const Double_t kp0 = 1.3; const Double_t kxn = 8.28; const Double_t kxlim=0.5; const Double_t kt=0.160; const Double_t kxmpi=0.139; const Double_t kb=1.; Double_t y, y1, xmpi2, ynorm, a; Double_t x=*px; // y1=TMath::Power(kp0/(kp0+kxlim),kxn); xmpi2=kxmpi*kxmpi; ynorm=kb*(TMath::Exp(-sqrt(kxlim*kxlim+xmpi2)/kt)); a=ynorm/y1; if (x > kxlim) y=a*TMath::Power(kp0/(kp0+x),kxn); else y=kb*TMath::Exp(-sqrt(x*x+xmpi2)/kt); return y*x; } // // y-distribution // Double_t AliGenMUONlib::YPion( const Double_t *py, const Double_t */*dummy*/) { // Pion y Double_t y=TMath::Abs(*py); /* const Double_t ka = 7000.; const Double_t kdy = 4.; Double_t ex = y*y/(2*kdy*kdy); return ka*TMath::Exp(-ex); */ return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; } // particle composition // Int_t AliGenMUONlib::IpPion(TRandom *ran) { // Pion composition if (ran->Rndm() < 0.5) { return 211; } else { return -211; } } //____________________________________________________________ // // Mt-scaling Double_t AliGenMUONlib::PtScal(Double_t pt, Int_t np) { // SCALING EN MASSE PAR RAPPORT A PTPI // MASS PI,K,ETA,RHO,OMEGA,ETA',PHI const Double_t khm[10] = {.13957,.493,.5488,.769,.7826,.958,1.02,0,0,0}; // VALUE MESON/PI AT 5 GEV const Double_t kfmax[10]={1.,0.3,0.55,1.0,1.0,1.0,1.0,0,0,0}; np--; Double_t f5=TMath::Power(((sqrt(100.018215)+2.)/(sqrt(100.+khm[np]*khm[np])+2.0)),12.3); Double_t fmax2=f5/kfmax[np]; // PIONS Double_t ptpion=100.*PtPion(&pt, (Double_t*) 0); Double_t fmtscal=TMath::Power(((sqrt(pt*pt+0.018215)+2.)/ (sqrt(pt*pt+khm[np]*khm[np])+2.0)),12.3)/ fmax2; return fmtscal*ptpion; } // // kaon // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtKaon( const Double_t *px, const Double_t */*dummy*/) { // Kaon pT return PtScal(*px,2); } // y-distribution //____________________________________________________________ Double_t AliGenMUONlib::YKaon( const Double_t *py, const Double_t */*dummy*/) { // Kaon y Double_t y=TMath::Abs(*py); /* const Double_t ka = 1000.; const Double_t kdy = 4.; // Double_t ex = y*y/(2*kdy*kdy); return ka*TMath::Exp(-ex); */ return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; } // particle composition // Int_t AliGenMUONlib::IpKaon(TRandom *ran) { // Kaon composition if (ran->Rndm() < 0.5) { return 321; } else { return -321; } } // J/Psi // // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtJpsiPP7000( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 7 TeV // using ALICE data at 2.5 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtJpsiPP2760(px,dummy); } Double_t AliGenMUONlib::PtJpsi( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT const Double_t kpt0 = 4.; const Double_t kxn = 3.6; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaled( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // PbPb 5.5 TeV // scaled from CDF data at 2 TeV // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 const Double_t kpt0 = 5.100; const Double_t kxn = 4.102; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 14 TeV // scaled from CDF data at 2 TeV const Double_t kpt0 = 5.630; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 10 TeV // scaled from CDF data at 2 TeV const Double_t kpt0 = 5.334; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 8.8 TeV // scaled from CDF data at 2 TeV // const Double_t kpt0 = 5.245; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 7 TeV // scaled from CDF data at 2 TeV const Double_t kpt0 = 5.072; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 3.94 TeV // scaled from CDF data at 2 TeV // const Double_t kpt0 = 4.647; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP3( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 2.76 TeV // scaled from CDF data at 1.9 TeV // const Double_t kpt0 = 4.435; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPP2( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT // // pp 1.9 TeV // fit of the CDF data at 1.9 TeV // const Double_t kpt0 = 4.233; const Double_t kxn = 4.071; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtJpsiCDFscaledPPb9( const Double_t *px, const Double_t *dummy) { // J/Psi pT // // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 // Double_t c[5] = {6.42774e-01, 1.86168e-02, -6.77296e-04, 8.93512e-06, 1.31586e-07}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); } Double_t AliGenMUONlib::PtJpsiCDFscaledPbP9( const Double_t *px, const Double_t *dummy) { // J/Psi pT // // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 // Double_t c[5] = {8.58557e-01, 5.39791e-02, -4.75180e-03, 2.49463e-04, 5.52396e-05}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); } Double_t AliGenMUONlib::PtJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) { // J/Psi pT // // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 // Double_t c[5] = {6.01022e-01, 4.70988e-02, -2.27917e-03, 3.09885e-05, 1.31955e-06}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtJpsiCDFscaledPP4(px,dummy); } Double_t AliGenMUONlib::PtJpsiFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) { return 1.; } Double_t AliGenMUONlib::PtJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT spectrum // // R. Vogt 2002 // PbPb 5.5 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Float_t x = px[0]; Float_t c[8] = { -2.13098e+00, 9.46552e+00, -5.06799e+00, 1.27260e+00, -1.83806e-01, 1.55853e-02, -7.23241e-04, 1.42105e-05 }; Double_t y; if (x < 10.) { Int_t j; y = c[j = 7]; while (j > 0) y = y * x +c[--j]; y = x * TMath::Exp(y); } else { y = 0.; } return y; } Double_t AliGenMUONlib::PtJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT spectrum // B -> J/Psi X Double_t x0 = 4.0384; Double_t n = 3.0288; Double_t x = px[0]; Double_t y = x / TMath::Power((1. + (x/x0)*(x/x0)), n); return y; } Double_t AliGenMUONlib::PtJpsiPP( const Double_t *px, const Double_t */*dummy*/) { // J/Psi pT spectrum // // R. Vogt 2002 // pp 14 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Float_t x = px[0]; Float_t c[4] = {8.47471e+00, -1.93567e+00, 1.50271e-01, -5.51212e-03}; Double_t y; if (x < 10.) { Int_t j; y = c[j = 3]; while (j > 0) y = y * x +c[--j]; y = x * TMath::Exp(y); } else { y = 0.; } return y; } // // y-distribution //____________________________________________________________ Double_t AliGenMUONlib::YJpsiPP7000( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 7 TeV // from the fit of RHIC + LHC data, see arXiv:1103.2394 // Double_t x = px[0]/7.72; x = x*x; Double_t y = TMath::Exp(-x/0.383/0.383/2); if(x > 1) y=0; return y; } Double_t AliGenMUONlib::YJpsiPP2760( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 2.76 TeV // from the fit of RHIC + LHC data, see arXiv:1103.2394 // Double_t x = px[0]/6.79; x = x*x; Double_t y = TMath::Exp(-x/0.383/0.383/2); if(x > 1) y=0; return y; } Double_t AliGenMUONlib::YJpsiPbPb2760( const Double_t *px, const Double_t *dummy) { // J/Psi y // // PbPb 2.76 TeV, for EKS98 with minimum bias shadowing factor 0.66 // Double_t c[4] = {5.95228e-01, 9.45069e-03, 2.44710e-04, -1.32894e-05}; Double_t x = px[0]*px[0]; Double_t y; Int_t j; y = c[j = 3]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YJpsiPP2760(px,dummy); } Double_t AliGenMUONlib::YJpsi(const Double_t *py, const Double_t */*dummy*/) { // J/psi y const Double_t ky0 = 4.; const Double_t kb=1.; Double_t yj; Double_t y=TMath::Abs(*py); // if (y < ky0) yj=kb; else yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yj; } Double_t AliGenMUONlib::YJpsiFlat( const Double_t */*py*/, const Double_t */*dummy*/ ) { return 1.; } Double_t AliGenMUONlib::YJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) { // // J/Psi y // // // R. Vogt 2002 // PbPb 5.5 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Double_t c[5] = {-6.03425e+02, 4.98257e+02, -1.38794e+02, 1.62209e+01, -6.85955e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 4.) { y = 31.754; } else if (x < 6) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } return y; } Double_t AliGenMUONlib::YJpsiCDFscaled( const Double_t *px, const Double_t* dummy) { // J/Psi y return AliGenMUONlib::YJpsiPbPb(px, dummy); } Double_t AliGenMUONlib::YJpsiCDFscaledPP( const Double_t *px, const Double_t* dummy) { // J/Psi y return AliGenMUONlib::YJpsiPP(px, dummy); } Double_t AliGenMUONlib::YJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 10 TeV // scaled from YJpsiPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 // Double_t c[5] = {2.46681e+01, 8.91486e+01, -3.21227e+01, 3.63075e+00, -1.32047e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 3.2) { y = 98.523 - 1.3664 * x * x; } else if (x < 7.5) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } if(y<0) y=0; return y; } Double_t AliGenMUONlib::YJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 8.8 TeV // rescaling of YJpsiPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD // Double_t c[5] = {3.33882e+02, -1.30980e+02, 2.59082e+01, -3.08935e+00, 1.56375e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 3.7) { y = 99.236 - 1.5498 * x * x; } else if (x < 7.4) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } if(y<0) y=0; return y; } Double_t AliGenMUONlib::YJpsiCDFscaledPP9dummy(Double_t px) { return AliGenMUONlib::YJpsiCDFscaledPP9(&px, (Double_t*) 0); } Double_t AliGenMUONlib::YJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 7 TeV // scaled from YJpsiPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. // Double_t c[5] = {6.71181e+02, -3.69240e+02, 8.89644e+01, -1.04937e+01, 4.80959e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 4.0) { y = 100.78 - 1.8353 * x * x; } else if (x < 7.3) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } if(y<0) y=0; return y; } Double_t AliGenMUONlib::YJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 3.94 TeV // rescaling of YJpsiPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD // Double_t c[5] = {4.00785e+02, -1.41159e+01, -3.28599e+01, 5.53048e+00, -2.45151e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 5.5) { y = 107.389 - 2.7454 * x * x; } else if (x < 7.0) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } if(y<0) y=0; return y; } Double_t AliGenMUONlib::YJpsiCDFscaledPP3( const Double_t *px, const Double_t *dummy) { // J/Psi y return AliGenMUONlib::YJpsiPP2760(px, dummy); } Double_t AliGenMUONlib::YJpsiCDFscaledPP2( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pp 1.9 TeV // from the fit of RHIC + LHC data, see arXiv:1103.2394 // Double_t x = px[0]/6.42; x = x*x; Double_t y = TMath::Exp(-x/0.383/0.383/2); if(x > 1) y=0; return y; } Double_t AliGenMUONlib::YJpsiPP( const Double_t *px, const Double_t */*dummy*/) { // // J/Psi y // // // R. Vogt 2002 // pp 14 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Double_t c[5] = {1.38532e+00, 1.00596e+02, -3.46378e+01, 3.94172e+00, -1.48319e-01}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x < 2.5) { y = 96.455 - 0.8483 * x * x; } else if (x < 7.9) { Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; } else { y =0.; } return y; } Double_t AliGenMUONlib::YJpsiCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 // Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, -4.16509e-05,-7.62709e-06}; Double_t y; Double_t x = px[0] + 0.47; // rapidity shift Int_t j; y = c[j = 6]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); } Double_t AliGenMUONlib::YJpsiCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) { // J/Psi y // // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 // Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, -4.16509e-05,-7.62709e-06}; Double_t y; Double_t x = -px[0] + 0.47; // rapidity shift Int_t j; y = c[j = 6]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); } Double_t AliGenMUONlib::YJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) { // J/Psi y // // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 // Double_t c[4] = {5.95228e-01, 9.45069e-03, 2.44710e-04, -1.32894e-05}; Double_t x = px[0]*px[0]; Double_t y; Int_t j; y = c[j = 3]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YJpsiCDFscaledPP4(px,dummy); } Double_t AliGenMUONlib::YJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) { // // J/Psi from B->J/Psi X // // Double_t c[7] = {7.37025e-02, 0., -2.94487e-03, 0., 6.07953e-06, 0., 5.39219e-07}; Double_t x = TMath::Abs(px[0]); Double_t y; if (x > 6.) { y = 0.; } else { Int_t j; y = c[j = 6]; while (j > 0) y = y * x + c[--j]; } return y; } // particle composition // Int_t AliGenMUONlib::IpJpsi(TRandom *) { // J/Psi composition return 443; } Int_t AliGenMUONlib::IpPsiP(TRandom *) { // Psi prime composition return 100443; } Int_t AliGenMUONlib::IpJpsiFamily(TRandom *) { // J/Psi composition Int_t ip; Float_t r = gRandom->Rndm(); if (r < 0.98) { ip = 443; } else { ip = 100443; } return ip; } // Upsilon // // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtUpsilon( const Double_t *px, const Double_t */*dummy*/ ) { // Upsilon pT const Double_t kpt0 = 5.3; const Double_t kxn = 2.5; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaled( const Double_t *px, const Double_t */*dummy*/ ) { // Upsilon pT const Double_t kpt0 = 7.753; const Double_t kxn = 3.042; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPP( const Double_t *px, const Double_t */*dummy*/ ) { // Upsilon pT // // pp 14 TeV // // scaled from CDF data at 2 TeV const Double_t kpt0 = 8.610; const Double_t kxn = 3.051; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) { // Upsilon pT // // pp 10 TeV // // scaled from CDF data at 2 TeV const Double_t kpt0 = 8.235; const Double_t kxn = 3.051; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) { // Upsilon pT // // pp 8.8 TeV // scaled from CDF data at 2 TeV // const Double_t kpt0 = 8.048; const Double_t kxn = 3.051; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) { // Upsilon pT // // pp 7 TeV // // scaled from CDF data at 2 TeV const Double_t kpt0 = 7.817; const Double_t kxn = 3.051; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) { // Upsilon pT // // pp 3.94 TeV // scaled from CDF data at 2 TeV // const Double_t kpt0 = 7.189; const Double_t kxn = 3.051; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPPb9( const Double_t *px, const Double_t *dummy) { // Upsilon pT // // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 // Double_t c[5] = {7.64952e-01, 1.12501e-04, 4.96038e-04, -3.03198e-05, 3.74035e-06}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPbP9( const Double_t *px, const Double_t *dummy) { // Upsilon pT // // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 // Double_t c[5] = {1.09881e+00, 3.08329e-03, -2.00356e-04, 8.28991e-06, 2.52576e-06}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); } Double_t AliGenMUONlib::PtUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) { // Upsilon pT // // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 // Double_t c[5] = {8.65872e-01, 2.05465e-03, 2.56063e-04, -1.65598e-05, 2.29209e-06}; Double_t x=*px; Double_t y; Int_t j; y = c[j = 4]; while (j > 0) y = y * x + c[--j]; // Double_t d = 1.+c[4]*TMath::Power(x,4); return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP4(px,dummy); } Double_t AliGenMUONlib::PtUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) { return 1.; } Double_t AliGenMUONlib::PtUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) { // // Upsilon pT // // // R. Vogt 2002 // PbPb 5.5 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Float_t x = px[0]; Double_t c[8] = { -1.03488e+01, 1.28065e+01, -6.60500e+00, 1.66140e+00, -2.34293e-01, 1.86925e-02, -7.80708e-04, 1.30610e-05 }; Double_t y; if (x < 10.) { Int_t j; y = c[j = 7]; while (j > 0) y = y * x +c[--j]; y = x * TMath::Exp(y); } else { y = 0.; } return y; } Double_t AliGenMUONlib::PtUpsilonPP( const Double_t *px, const Double_t */*dummy*/) { // // Upsilon pT // // // R. Vogt 2002 // pp 14 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Float_t x = px[0]; Double_t c[8] = {-7.93955e+00, 1.06306e+01, -5.21392e+00, 1.19703e+00, -1.45718e-01, 8.95151e-03, -2.04806e-04, -1.13053e-06}; Double_t y; if (x < 10.) { Int_t j; y = c[j = 7]; while (j > 0) y = y * x +c[--j]; y = x * TMath::Exp(y); } else { y = 0.; } return y; } // // y-distribution // //____________________________________________________________ Double_t AliGenMUONlib::YUpsilon(const Double_t *py, const Double_t */*dummy*/) { // Upsilon y const Double_t ky0 = 3.; const Double_t kb=1.; Double_t yu; Double_t y=TMath::Abs(*py); // if (y < ky0) yu=kb; else yu=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yu; } Double_t AliGenMUONlib::YUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) { // // Upsilon y // // // R. Vogt 2002 // PbPb 5.5 TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Double_t c[7] = {3.40036e-01, -3.98882e-07, -4.48398e-03, 8.46411e-08, -6.10854e-04, -2.99753e-09, 1.28895e-05}; Double_t x = TMath::Abs(px[0]); if (x > 5.55) return 0.; Int_t j; Double_t y = c[j = 6]; while (j > 0) y = y * x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonCDFscaled( const Double_t *px, const Double_t *dummy) { // Upsilon y return AliGenMUONlib::YUpsilonPbPb(px, dummy); } Double_t AliGenMUONlib::YUpsilonCDFscaledPP( const Double_t *px, const Double_t *dummy) { // Upsilon y return AliGenMUONlib::YUpsilonPP(px, dummy); } Double_t AliGenMUONlib::YUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/) { // Upsilon y return 1.; } Double_t AliGenMUONlib::YUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // pp 10 TeV // scaled from YUpsilonPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 // Double_t c[4] = {1., -2.17877e-02, -6.52830e-04, 1.40578e-05}; Double_t x = TMath::Abs(px[0]); if (x > 6.1) return 0.; Int_t j; Double_t y = c[j = 3]; while (j > 0) y = y * x*x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // pp 8.8 TeV // rescaling of YUpsilonPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD // Double_t c[4] = {1., -2.37621e-02, -6.29610e-04, 1.47976e-05}; Double_t x = TMath::Abs(px[0]); if (x > 6.1) return 0.; Int_t j; Double_t y = c[j = 3]; while (j > 0) y = y * x*x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonCDFscaledPP9dummy(Double_t px) { return AliGenMUONlib::YUpsilonCDFscaledPP9(&px, (Double_t*) 0); } Double_t AliGenMUONlib::YUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // pp 7 TeV // scaled from YUpsilonPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. // Double_t c[4] = {1., -2.61009e-02, -6.83937e-04, 1.78451e-05}; Double_t x = TMath::Abs(px[0]); if (x > 6.0) return 0.; Int_t j; Double_t y = c[j = 3]; while (j > 0) y = y * x*x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // pp 3.94 TeV // rescaling of YUpsilonPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD // Double_t c[4] = {1., -3.91924e-02, -4.26184e-04, 2.10914e-05}; Double_t x = TMath::Abs(px[0]); if (x > 5.7) return 0.; Int_t j; Double_t y = c[j = 3]; while (j > 0) y = y * x*x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonPP( const Double_t *px, const Double_t */*dummy*/) { // // Upsilon y // // // R. Vogt 2002 // p p 14. TeV // MRST HO // mc = 1.4 GeV, pt-kick 1 GeV // Double_t c[7] = {8.91936e-01, -6.46645e-07, -1.52774e-02, 4.28677e-08, -7.01517e-04, -6.20539e-10, 1.29943e-05}; Double_t x = TMath::Abs(px[0]); if (x > 6.2) return 0.; Int_t j; Double_t y = c[j = 6]; while (j > 0) y = y * x +c[--j]; return y; } Double_t AliGenMUONlib::YUpsilonCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 // Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, -4.67538e-05,-2.11683e-06}; Double_t y; Double_t x = px[0] + 0.47; // rapidity shift Int_t j; y = c[j = 6]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); } Double_t AliGenMUONlib::YUpsilonCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) { // Upsilon y // // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 // Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, -4.67538e-05,-2.11683e-06}; Double_t y; Double_t x = -px[0] + 0.47; // rapidity shift Int_t j; y = c[j = 6]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); } Double_t AliGenMUONlib::YUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) { // Upsilon y // // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 // Double_t c[4] = {8.27837e-01, 1.70115e-02, -1.26046e-03, 1.52091e-05}; Double_t x = px[0]*px[0]; Double_t y; Int_t j; y = c[j = 3]; while (j > 0) y = y * x + c[--j]; if(y<0) y=0; return y * AliGenMUONlib::YUpsilonCDFscaledPP4(px,dummy); } // particle composition // Int_t AliGenMUONlib::IpUpsilon(TRandom *) { // y composition return 553; } Int_t AliGenMUONlib::IpUpsilonP(TRandom *) { // y composition return 100553; } Int_t AliGenMUONlib::IpUpsilonPP(TRandom *) { // y composition return 200553; } Int_t AliGenMUONlib::IpUpsilonFamily(TRandom *) { // y composition Int_t ip; Float_t r = gRandom->Rndm(); if (r < 0.712) { ip = 553; } else if (r < 0.896) { ip = 100553; } else { ip = 200553; } return ip; } // // Phi // // // pt-distribution (by scaling of pion distribution) //____________________________________________________________ Double_t AliGenMUONlib::PtPhi( const Double_t *px, const Double_t */*dummy*/) { // Phi pT return PtScal(*px,7); } // y-distribution Double_t AliGenMUONlib::YPhi( const Double_t *px, const Double_t */*dummy*/) { // Phi y Double_t *dum=0; return YJpsi(px,dum); } // particle composition // Int_t AliGenMUONlib::IpPhi(TRandom *) { // Phi composition return 333; } // // omega // // // pt-distribution (by scaling of pion distribution) //____________________________________________________________ Double_t AliGenMUONlib::PtOmega( const Double_t *px, const Double_t */*dummy*/) { // Omega pT return PtScal(*px,5); } // y-distribution Double_t AliGenMUONlib::YOmega( const Double_t *px, const Double_t */*dummy*/) { // Omega y Double_t *dum=0; return YJpsi(px,dum); } // particle composition // Int_t AliGenMUONlib::IpOmega(TRandom *) { // Omega composition return 223; } // // Eta // // // pt-distribution (by scaling of pion distribution) //____________________________________________________________ Double_t AliGenMUONlib::PtEta( const Double_t *px, const Double_t */*dummy*/) { // Eta pT return PtScal(*px,3); } // y-distribution Double_t AliGenMUONlib::YEta( const Double_t *px, const Double_t */*dummy*/) { // Eta y Double_t *dum=0; return YJpsi(px,dum); } // particle composition // Int_t AliGenMUONlib::IpEta(TRandom *) { // Eta composition return 221; } // // Charm // // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtCharm( const Double_t *px, const Double_t */*dummy*/) { // Charm pT const Double_t kpt0 = 2.25; const Double_t kxn = 3.17; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtCharmCentral( const Double_t *px, const Double_t */*dummy*/) { // Charm pT const Double_t kpt0 = 2.12; const Double_t kxn = 2.78; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: // PtCharmFiMjSkPP = PtCharmF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR // i=0,1,2; j=0,1,2; k=0,1,...,6 // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) // calculations for the following inputs: // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV // for j=0,1 & 2 respectively; // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). // June 2008, Smbat.Grigoryan@cern.ch // Charm pT // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) // for pp collisions at 14 TeV with one c-cbar pair per event. // Corresponding NLO total cross section is 5.68 mb const Double_t kpt0 = 2.2930; const Double_t kxn = 3.1196; Double_t c[3]={-5.2180e-01,1.8753e-01,2.8669e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 6.06 mb const Double_t kpt0 = 2.8669; const Double_t kxn = 3.1044; Double_t c[3]={-4.6714e-01,1.5005e-01,4.5003e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 6.06 mb const Double_t kpt0 = 1.8361; const Double_t kxn = 3.2966; Double_t c[3]={-6.1550e-01,2.6498e-01,1.0728e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 7.69 mb const Double_t kpt0 = 2.1280; const Double_t kxn = 3.1397; Double_t c[3]={-5.4021e-01,2.0944e-01,2.5211e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 4.81 mb const Double_t kpt0 = 2.4579; const Double_t kxn = 3.1095; Double_t c[3]={-5.1497e-01,1.7532e-01,3.2429e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 14.09 mb const Double_t kpt0 = 2.1272; const Double_t kxn = 3.1904; Double_t c[3]={-4.6088e-01,2.1918e-01,2.3055e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 1.52 mb const Double_t kpt0 = 2.8159; const Double_t kxn = 3.0857; Double_t c[3]={-6.4691e-01,2.0289e-01,2.4922e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 3.67 mb const Double_t kpt0 = 2.7297; const Double_t kxn = 3.3019; Double_t c[3]={-6.2216e-01,1.9031e-01,1.5341e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 3.38 mb const Double_t kpt0 = 2.3894; const Double_t kxn = 3.1075; Double_t c[3]={-4.9742e-01,1.7032e-01,2.5994e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 10.37 mb const Double_t kpt0 = 2.0187; const Double_t kxn = 3.3011; Double_t c[3]={-3.9869e-01,2.9248e-01,1.1763e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } Double_t AliGenMUONlib::PtCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) { // Charm pT // Corresponding NLO total cross section is 7.22 mb const Double_t kpt0 = 2.1089; const Double_t kxn = 3.1848; Double_t c[3]={-4.6275e-01,1.8114e-01,2.1363e-02}; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); } // y-distribution Double_t AliGenMUONlib::YCharm( const Double_t *px, const Double_t */*dummy*/) { // Charm y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) // shadowing + kt broadening Double_t x=px[0]; Double_t c[2]={-2.42985e-03,-2.31001e-04}; Double_t y=1+(c[0]*TMath::Power(x,2))+(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>8) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: // YCharmFiMjSkPP = YCharmF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR // i=0,1,2; j=0,1,2; k=0,1,...,6 // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) // calculations for the following inputs: // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV // for j=0,1 & 2 respectively; // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) // with a/b = 1/1,1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). // June 2008, Smbat.Grigoryan@cern.ch // Charm y // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) // for pp collisions at 14 TeV with one c-cbar pair per event. // Corresponding NLO total cross section is 5.68 mb Double_t x=px[0]; Double_t c[2]={7.0909e-03,6.1967e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 6.06 mb Double_t x=px[0]; Double_t c[2]={6.9707e-03,6.0971e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 6.06 mb Double_t x=px[0]; Double_t c[2]={7.1687e-03,6.5303e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 7.69 mb Double_t x=px[0]; Double_t c[2]={5.9090e-03,7.1854e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 4.81 mb Double_t x=px[0]; Double_t c[2]={8.0882e-03,5.5872e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 14.09 mb Double_t x=px[0]; Double_t c[2]={7.2520e-03,6.2691e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 1.52 mb Double_t x=px[0]; Double_t c[2]={1.1040e-04,1.4498e-04}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 3.67 mb Double_t x=px[0]; Double_t c[2]={-3.1328e-03,1.8270e-04}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 3.38 mb Double_t x=px[0]; Double_t c[2]={7.0865e-03,6.2532e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 10.37 mb Double_t x=px[0]; Double_t c[2]={7.7070e-03,5.3533e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Double_t AliGenMUONlib::YCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) { // Charm y // Corresponding NLO total cross section is 7.22 mb Double_t x=px[0]; Double_t c[2]={7.9195e-03,5.3823e-05}; Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); Double_t ycharm; if (TMath::Abs(x)>9) { ycharm=0.; } else { ycharm=TMath::Power(y,3); } return ycharm; } Int_t AliGenMUONlib::IpCharm(TRandom *ran) { // Charm composition Float_t random; Int_t ip; // 411,421,431,4122 random = ran->Rndm(); // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 // >>>>> cf. tab 4 p 11 if (random < 0.30) { ip=421; } else if (random < 0.60) { ip=-421; } else if (random < 0.70) { ip=411; } else if (random < 0.80) { ip=-411; } else if (random < 0.86) { ip=431; } else if (random < 0.92) { ip=-431; } else if (random < 0.96) { ip=4122; } else { ip=-4122; } return ip; } // // Beauty // // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtBeauty( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT const Double_t kpt0 = 6.53; const Double_t kxn = 3.59; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyCentral( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT const Double_t kpt0 = 6.14; const Double_t kxn = 2.93; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: // PtBeautyFiMjSkPP = PtBeautyF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR // i=0,1,2; j=0,1,2; k=0,1,...,6 // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) // calculations for the following inputs: // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV // for j=0,1 & 2 respectively; // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). // June 2008, Smbat.Grigoryan@cern.ch // Beauty pT // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) // for pp collisions at 14 TeV with one b-bbar pair per event. // Corresponding NLO total cross section is 0.494 mb const Double_t kpt0 = 8.0575; const Double_t kxn = 3.1921; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.445 mb const Double_t kpt0 = 8.6239; const Double_t kxn = 3.2911; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.445 mb const Double_t kpt0 = 7.3367; const Double_t kxn = 3.0692; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.518 mb const Double_t kpt0 = 7.6409; const Double_t kxn = 3.1364; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.384 mb const Double_t kpt0 = 8.4948; const Double_t kxn = 3.2546; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.648 mb const Double_t kpt0 = 7.6631; const Double_t kxn = 3.1621; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.294 mb const Double_t kpt0 = 8.7245; const Double_t kxn = 3.2213; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.475 mb const Double_t kpt0 = 8.5296; const Double_t kxn = 3.2187; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.324 mb const Double_t kpt0 = 7.9440; const Double_t kxn = 3.1614; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.536 mb const Double_t kpt0 = 8.2408; const Double_t kxn = 3.3029; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty pT // Corresponding NLO total cross section is 0.420 mb const Double_t kpt0 = 7.8041; const Double_t kxn = 3.2094; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } // y-distribution Double_t AliGenMUONlib::YBeauty( const Double_t *px, const Double_t */*dummy*/) { // Beauty y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) // shadowing + kt broadening Double_t x=px[0]; Double_t c[2]={-1.27590e-02,-2.42731e-04}; Double_t y=1+c[0]*TMath::Power(x,2)+c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: // YBeautyFiMjSkPP = YBeautyF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR // i=0,1,2; j=0,1,2; k=0,1,...,6 // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) // calculations for the following inputs: // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV // for j=0,1 & 2 respectively; // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). // June 2008, Smbat.Grigoryan@cern.ch // Beauty y // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) // for pp collisions at 14 TeV with one b-bbar pair per event. // Corresponding NLO total cross section is 0.494 mb Double_t x=px[0]; Double_t c[2]={1.2350e-02,9.2667e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.445 mb Double_t x=px[0]; Double_t c[2]={1.2292e-02,9.1847e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.445 mb Double_t x=px[0]; Double_t c[2]={1.2436e-02,9.3709e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.518 mb Double_t x=px[0]; Double_t c[2]={1.1714e-02,1.0068e-04}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.384 mb Double_t x=px[0]; Double_t c[2]={1.2944e-02,8.5500e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.648 mb Double_t x=px[0]; Double_t c[2]={1.2455e-02,9.2713e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.294 mb Double_t x=px[0]; Double_t c[2]={1.0897e-02,1.1878e-04}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.475 mb Double_t x=px[0]; Double_t c[2]={1.0912e-02,1.1858e-04}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.324 mb Double_t x=px[0]; Double_t c[2]={1.2378e-02,9.2490e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.536 mb Double_t x=px[0]; Double_t c[2]={1.2886e-02,8.2912e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Double_t AliGenMUONlib::YBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) { // Beauty y // Corresponding NLO total cross section is 0.420 mb Double_t x=px[0]; Double_t c[2]={1.3106e-02,8.0115e-05}; Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); Double_t ybeauty; if (TMath::Abs(x)>7.6) { ybeauty=0.; } else { ybeauty=TMath::Power(y,3); } return ybeauty; } Int_t AliGenMUONlib::IpBeauty(TRandom *ran) { // Beauty Composition Float_t random; Int_t ip; random = ran->Rndm(); // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 // >>>>> cf. tab 4 p 11 if (random < 0.20) { ip=511; } else if (random < 0.40) { ip=-511; } else if (random < 0.605) { ip=521; } else if (random < 0.81) { ip=-521; } else if (random < 0.87) { ip=531; } else if (random < 0.93) { ip=-531; } else if (random < 0.965) { ip=5122; } else { ip=-5122; } return ip; } typedef Double_t (*GenFunc) (const Double_t*, const Double_t*); GenFunc AliGenMUONlib::GetPt(Int_t param, const char* tname) const { // Return pointer to pT parameterisation TString sname = TString(tname); GenFunc func; switch (param) { case kPhi: func=PtPhi; break; case kOmega: func=PtOmega; break; case kEta: func=PtEta; break; case kJpsiFamily: case kPsiP: case kChic1: case kChic2: case kJpsi: if (sname == "Vogt" || sname == "Vogt PbPb") { func=PtJpsiPbPb; } else if (sname == "Vogt pp") { func=PtJpsiPP; } else if (sname == "pp 7") { func=PtJpsiPP7000; } else if (sname == "pp 2.76") { func=PtJpsiPP2760; } else if (sname == "PbPb 2.76") { func=PtJpsiPbPb2760; } else if (sname == "CDF scaled") { func=PtJpsiCDFscaled; } else if (sname == "CDF pp") { func=PtJpsiCDFscaledPP; } else if (sname == "CDF pp 10") { func=PtJpsiCDFscaledPP10; } else if (sname == "CDF pp 8.8") { func=PtJpsiCDFscaledPP9; } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat y") { func=PtJpsiCDFscaledPP7; } else if (sname == "CDF pp 3.94") { func=PtJpsiCDFscaledPP4; } else if (sname == "CDF pp 2.76") { func=PtJpsiCDFscaledPP3; } else if (sname == "CDF pp 1.9") { func=PtJpsiCDFscaledPP2; } else if (sname == "CDF pPb 8.8") { func=PtJpsiCDFscaledPPb9; } else if (sname == "CDF Pbp 8.8") { func=PtJpsiCDFscaledPbP9; } else if (sname == "CDF PbPb 3.94") { func=PtJpsiCDFscaledPbPb4; } else if (sname == "Flat" || sname == "CDF pp 7 flat pt") { func=PtJpsiFlat; } else { func=PtJpsi; } break; case kJpsiFromB: func = PtJpsiBPbPb; break; case kUpsilonFamily: case kUpsilonP: case kUpsilonPP: case kUpsilon: if (sname == "Vogt" || sname == "Vogt PbPb") { func=PtUpsilonPbPb; } else if (sname == "Vogt pp") { func=PtUpsilonPP; } else if (sname == "CDF scaled") { func=PtUpsilonCDFscaled; } else if (sname == "CDF pp") { func=PtUpsilonCDFscaledPP; } else if (sname == "CDF pp 10") { func=PtUpsilonCDFscaledPP10; } else if (sname == "CDF pp 8.8") { func=PtUpsilonCDFscaledPP9; } else if (sname == "CDF pp 7") { func=PtUpsilonCDFscaledPP7; } else if (sname == "CDF pp 3.94") { func=PtUpsilonCDFscaledPP4; } else if (sname == "CDF pPb 8.8") { func=PtUpsilonCDFscaledPPb9; } else if (sname == "CDF Pbp 8.8") { func=PtUpsilonCDFscaledPbP9; } else if (sname == "CDF PbPb 3.94") { func=PtUpsilonCDFscaledPbPb4; } else if (sname == "Flat") { func=PtUpsilonFlat; } else { func=PtUpsilon; } break; case kCharm: if (sname == "F0M0S0 pp") { func=PtCharmF0M0S0PP; } else if (sname == "F1M0S0 pp") { func=PtCharmF1M0S0PP; } else if (sname == "F2M0S0 pp") { func=PtCharmF2M0S0PP; } else if (sname == "F0M1S0 pp") { func=PtCharmF0M1S0PP; } else if (sname == "F0M2S0 pp") { func=PtCharmF0M2S0PP; } else if (sname == "F0M0S1 pp") { func=PtCharmF0M0S1PP; } else if (sname == "F0M0S2 pp") { func=PtCharmF0M0S2PP; } else if (sname == "F0M0S3 pp") { func=PtCharmF0M0S3PP; } else if (sname == "F0M0S4 pp") { func=PtCharmF0M0S4PP; } else if (sname == "F0M0S5 pp") { func=PtCharmF0M0S5PP; } else if (sname == "F0M0S6 pp") { func=PtCharmF0M0S6PP; } else if (sname == "central") { func=PtCharmCentral; } else { func=PtCharm; } break; case kBeauty: if (sname == "F0M0S0 pp") { func=PtBeautyF0M0S0PP; } else if (sname == "F1M0S0 pp") { func=PtBeautyF1M0S0PP; } else if (sname == "F2M0S0 pp") { func=PtBeautyF2M0S0PP; } else if (sname == "F0M1S0 pp") { func=PtBeautyF0M1S0PP; } else if (sname == "F0M2S0 pp") { func=PtBeautyF0M2S0PP; } else if (sname == "F0M0S1 pp") { func=PtBeautyF0M0S1PP; } else if (sname == "F0M0S2 pp") { func=PtBeautyF0M0S2PP; } else if (sname == "F0M0S3 pp") { func=PtBeautyF0M0S3PP; } else if (sname == "F0M0S4 pp") { func=PtBeautyF0M0S4PP; } else if (sname == "F0M0S5 pp") { func=PtBeautyF0M0S5PP; } else if (sname == "F0M0S6 pp") { func=PtBeautyF0M0S6PP; } else if (sname == "central") { func=PtBeautyCentral; } else { func=PtBeauty; } break; case kPion: if (sname == "2010 Pos PP") { func=PtPionPos2010PP; } else if (sname == "2010 Neg PP") { func=PtPionNeg2010PP; } else { func=PtPion; } break; case kKaon: if (sname == "2010 Pos PP") { func=PtKaonPos2010PP; } else if (sname == "2010 Neg PP") { func=PtKaonNeg2010PP; } else { func=PtKaon; } break; case kChic0: func=PtChic0; break; case kChic: func=PtChic; break; default: func=0; printf(" unknown parametrisation\n"); } return func; } GenFunc AliGenMUONlib::GetY(Int_t param, const char* tname) const { // // Return pointer to y- parameterisation // TString sname = TString(tname); GenFunc func; switch (param) { case kPhi: func=YPhi; break; case kEta: func=YEta; break; case kOmega: func=YOmega; break; case kJpsiFamily: case kPsiP: case kChic1: case kChic2: case kJpsi: if (sname == "Vogt" || sname == "Vogt PbPb") { func=YJpsiPbPb; } else if (sname == "Vogt pp"){ func=YJpsiPP; } else if (sname == "pp 7") { func=YJpsiPP7000; } else if (sname == "pp 2.76") { func=YJpsiPP2760; } else if (sname == "PbPb 2.76") { func=YJpsiPbPb2760; } else if (sname == "CDF scaled") { func=YJpsiCDFscaled; } else if (sname == "CDF pp") { func=YJpsiCDFscaledPP; } else if (sname == "CDF pp 10") { func=YJpsiCDFscaledPP10; } else if (sname == "CDF pp 8.8") { func=YJpsiCDFscaledPP9; } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat pt") { func=YJpsiCDFscaledPP7; } else if (sname == "CDF pp 3.94") { func=YJpsiCDFscaledPP4; } else if (sname == "CDF pp 2.76") { func=YJpsiCDFscaledPP3; } else if (sname == "CDF pp 1.9") { func=YJpsiCDFscaledPP2; } else if (sname == "CDF pPb 8.8") { func=YJpsiCDFscaledPPb9; } else if (sname == "CDF Pbp 8.8") { func=YJpsiCDFscaledPbP9; } else if (sname == "CDF PbPb 3.94") { func=YJpsiCDFscaledPbPb4; } else if (sname == "Flat" || sname == "CDF pp 7 flat y") { func=YJpsiFlat; } else { func=YJpsi; } break; case kJpsiFromB: func = YJpsiBPbPb; break; case kUpsilonFamily: case kUpsilonP: case kUpsilonPP: case kUpsilon: if (sname == "Vogt" || sname == "Vogt PbPb") { func=YUpsilonPbPb; } else if (sname == "Vogt pp") { func = YUpsilonPP; } else if (sname == "CDF scaled") { func=YUpsilonCDFscaled; } else if (sname == "CDF pp") { func=YUpsilonCDFscaledPP; } else if (sname == "CDF pp 10") { func=YUpsilonCDFscaledPP10; } else if (sname == "CDF pp 8.8") { func=YUpsilonCDFscaledPP9; } else if (sname == "CDF pp 7") { func=YUpsilonCDFscaledPP7; } else if (sname == "CDF pp 3.94") { func=YUpsilonCDFscaledPP4; } else if (sname == "CDF pPb 8.8") { func=YUpsilonCDFscaledPPb9; } else if (sname == "CDF Pbp 8.8") { func=YUpsilonCDFscaledPbP9; } else if (sname == "CDF PbPb 3.94") { func=YUpsilonCDFscaledPbPb4; } else if (sname == "Flat") { func=YUpsilonFlat; } else { func=YUpsilon; } break; case kCharm: if (sname == "F0M0S0 pp") { func=YCharmF0M0S0PP; } else if (sname == "F1M0S0 pp") { func=YCharmF1M0S0PP; } else if (sname == "F2M0S0 pp") { func=YCharmF2M0S0PP; } else if (sname == "F0M1S0 pp") { func=YCharmF0M1S0PP; } else if (sname == "F0M2S0 pp") { func=YCharmF0M2S0PP; } else if (sname == "F0M0S1 pp") { func=YCharmF0M0S1PP; } else if (sname == "F0M0S2 pp") { func=YCharmF0M0S2PP; } else if (sname == "F0M0S3 pp") { func=YCharmF0M0S3PP; } else if (sname == "F0M0S4 pp") { func=YCharmF0M0S4PP; } else if (sname == "F0M0S5 pp") { func=YCharmF0M0S5PP; } else if (sname == "F0M0S6 pp") { func=YCharmF0M0S6PP; } else { func=YCharm; } break; case kBeauty: if (sname == "F0M0S0 pp") { func=YBeautyF0M0S0PP; } else if (sname == "F1M0S0 pp") { func=YBeautyF1M0S0PP; } else if (sname == "F2M0S0 pp") { func=YBeautyF2M0S0PP; } else if (sname == "F0M1S0 pp") { func=YBeautyF0M1S0PP; } else if (sname == "F0M2S0 pp") { func=YBeautyF0M2S0PP; } else if (sname == "F0M0S1 pp") { func=YBeautyF0M0S1PP; } else if (sname == "F0M0S2 pp") { func=YBeautyF0M0S2PP; } else if (sname == "F0M0S3 pp") { func=YBeautyF0M0S3PP; } else if (sname == "F0M0S4 pp") { func=YBeautyF0M0S4PP; } else if (sname == "F0M0S5 pp") { func=YBeautyF0M0S5PP; } else if (sname == "F0M0S6 pp") { func=YBeautyF0M0S6PP; } else { func=YBeauty; } break; case kPion: if (sname == "2010 Pos PP") { func=YKaonPion2010PP; } else if (sname == "2010 Neg PP") { func=YKaonPion2010PP; } else { func=YPion; } break; case kKaon: if (sname == "2010 Pos PP") { func=YKaonPion2010PP; } else if (sname == "2010 Neg PP") { func=YKaonPion2010PP; } else { func=YKaon; } break; case kChic0: func=YChic0; break; case kChic: func=YChic; break; default: func=0; printf(" unknown parametrisation\n"); } return func; } // // Chi // // // pt-distribution //____________________________________________________________ Double_t AliGenMUONlib::PtChic0( const Double_t *px, const Double_t */*dummy*/) { // Chi_c1 pT const Double_t kpt0 = 4.; const Double_t kxn = 3.6; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtChic1( const Double_t *px, const Double_t */*dummy*/) { // Chi_c1 pT const Double_t kpt0 = 4.; const Double_t kxn = 3.6; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtChic2( const Double_t *px, const Double_t */*dummy*/) { // Chi_c2 pT const Double_t kpt0 = 4.; const Double_t kxn = 3.6; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } Double_t AliGenMUONlib::PtChic( const Double_t *px, const Double_t */*dummy*/) { // Chi_c family pT const Double_t kpt0 = 4.; const Double_t kxn = 3.6; Double_t x=*px; // Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); return x/TMath::Power(pass1,kxn); } // // y-distribution //____________________________________________________________ Double_t AliGenMUONlib::YChic0(const Double_t *py, const Double_t */*dummy*/) { // Chi-1c y const Double_t ky0 = 4.; const Double_t kb=1.; Double_t yj; Double_t y=TMath::Abs(*py); // if (y < ky0) yj=kb; else yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yj; } Double_t AliGenMUONlib::YChic1(const Double_t *py, const Double_t */*dummy*/) { // Chi-1c y const Double_t ky0 = 4.; const Double_t kb=1.; Double_t yj; Double_t y=TMath::Abs(*py); // if (y < ky0) yj=kb; else yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yj; } Double_t AliGenMUONlib::YChic2(const Double_t *py, const Double_t */*dummy*/) { // Chi-2c y const Double_t ky0 = 4.; const Double_t kb=1.; Double_t yj; Double_t y=TMath::Abs(*py); // if (y < ky0) yj=kb; else yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yj; } Double_t AliGenMUONlib::YChic(const Double_t *py, const Double_t */*dummy*/) { // Chi_c family y const Double_t ky0 = 4.; const Double_t kb=1.; Double_t yj; Double_t y=TMath::Abs(*py); // if (y < ky0) yj=kb; else yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); return yj; } // particle composition // Int_t AliGenMUONlib::IpChic0(TRandom *) { // Chi composition return 10441; } // Int_t AliGenMUONlib::IpChic1(TRandom *) { // Chi composition return 20443; } Int_t AliGenMUONlib::IpChic2(TRandom *) { // Chi_c2 prime composition return 445; } Int_t AliGenMUONlib::IpChic(TRandom *) { // Chi composition Int_t ip; Float_t r = gRandom->Rndm(); if (r < 0.001) { ip = 10441; } else if( r < 0.377 ) { ip = 20443; } else { ip = 445; } return ip; } //_____________________________________________________________ typedef Int_t (*GenFuncIp) (TRandom *); GenFuncIp AliGenMUONlib::GetIp(Int_t param, const char* tname) const { // Return pointer to particle type parameterisation TString sname = TString(tname); GenFuncIp func; switch (param) { case kPhi: func=IpPhi; break; case kEta: func=IpEta; break; case kOmega: func=IpOmega; break; case kJpsiFamily: func=IpJpsiFamily; break; case kPsiP: func=IpPsiP; break; case kJpsi: case kJpsiFromB: func=IpJpsi; break; case kUpsilon: func=IpUpsilon; break; case kUpsilonFamily: func=IpUpsilonFamily; break; case kUpsilonP: func=IpUpsilonP; break; case kUpsilonPP: func=IpUpsilonPP; break; case kCharm: func=IpCharm; break; case kBeauty: func=IpBeauty; break; case kPion: if (sname == "2010 Pos PP") { func=IpPionPos; } else if (sname == "2010 Neg PP") { func=IpPionNeg; } else { func=IpPion; } break; case kKaon: if (sname == "2010 Pos PP") { func=IpKaonPos; } else if (sname == "2010 Neg PP") { func=IpKaonNeg; } else { func=IpKaon; } break; case kChic0: func=IpChic0; break; case kChic1: func=IpChic1; break; case kChic2: func=IpChic2; break; case kChic: func=IpChic; break; default: func=0; printf(" unknown parametrisation\n"); } return func; } Float_t AliGenMUONlib::Interpolate(Float_t x, Float_t* y, Float_t x0, Float_t dx, Int_t n, Int_t no) { // // Neville's alorithm for interpolation // // x: x-value // y: Input array // x0: minimum x // dx: step size // n: number of data points // no: order of polynom // Float_t* c = new Float_t[n]; Float_t* d = new Float_t[n]; Int_t m, i; for (i = 0; i < n; i++) { c[i] = y[i]; d[i] = y[i]; } Int_t ns = int((x - x0)/dx); Float_t y1 = y[ns]; ns--; for (m = 0; m < no; m++) { for (i = 0; i < n-m; i++) { Float_t ho = x0 + Float_t(i) * dx - x; Float_t hp = x0 + Float_t(i+m+1) * dx - x; Float_t w = c[i+1] - d[i]; Float_t den = ho-hp; den = w/den; d[i] = hp * den; c[i] = ho * den; } Float_t dy; if (2*ns < (n-m-1)) { dy = c[ns+1]; } else { dy = d[ns--]; } y1 += dy;} delete[] c; delete[] d; return y1; } //============================================================================= Double_t AliGenMUONlib::PtPionPos2010PP(const Double_t *px, const Double_t* /*dummy*/) { // Pos pion const Double_t par[3] = {2.27501, 0.116141, 5.59591}; Double_t pt = px[0]; Double_t m0 = TDatabasePDG::Instance()->GetParticle(211)->Mass(); Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); Double_t nc = par[1]*par[2]; Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); Double_t fn = par[0] * pt * t1 * t2; return fn; } //============================================================================= Double_t AliGenMUONlib::PtPionNeg2010PP(const Double_t *px, const Double_t* /*dummy*/) { // Neg pion const Double_t par[3] = {2.25188, 0.12176, 5.91166}; Double_t pt = px[0]; Double_t m0 = TDatabasePDG::Instance()->GetParticle(211)->Mass(); Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); Double_t nc = par[1]*par[2]; Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); Double_t fn = par[0] * pt * t1 * t2; return fn; } //============================================================================= Double_t AliGenMUONlib::PtKaonPos2010PP(const Double_t *px, const Double_t* /*dummy*/) { // Pos kaons const Double_t par[3] = {0.279386, 0.195466, 6.59587}; Double_t pt = px[0]; Double_t m0 = TDatabasePDG::Instance()->GetParticle(321)->Mass(); Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); Double_t nc = par[1]*par[2]; Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); Double_t fn = par[0] * pt * t1 * t2; return fn; } //============================================================================= Double_t AliGenMUONlib::PtKaonNeg2010PP(const Double_t *px, const Double_t* /*dummy*/) { // Neg kaons const Double_t par[3] = {0.278927, 0.189049, 6.43006}; Double_t pt = px[0]; Double_t m0 = TDatabasePDG::Instance()->GetParticle(321)->Mass(); Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); Double_t nc = par[1]*par[2]; Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); Double_t fn = par[0] * pt * t1 * t2; return fn; } //============================================================================= Double_t AliGenMUONlib::YKaonPion2010PP(const Double_t *px, const Double_t* /*dummy*/) { // pions and kaons Double_t y = px[0]; Double_t sigma = 2.35; Double_t kernal = y/2./sigma; Double_t fxn = TMath::Exp(-1.*kernal*kernal); return fxn; } //============================================================================= Int_t AliGenMUONlib::IpPionPos(TRandom *) { // Pos pions return 211; } //============================================================================= Int_t AliGenMUONlib::IpPionNeg(TRandom *) { // Neg pions return -211; } //============================================================================= Int_t AliGenMUONlib::IpKaonPos(TRandom *) { // pos Kaons return 321; } //============================================================================= Int_t AliGenMUONlib::IpKaonNeg(TRandom *) { // neg Kaons return -321; }