}
}
-/**************************************************************************
- * 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: AliGenTunedOnPbPb.cxx 51126 2013-08-19 13:37:49Z fnoferin $ */
-
-// Parameterisation based on 5.5 ATeV PbPb data
-// pi,K, p , K0, lambda, phi, Xi, Omega spectra, v2, v3 (no jets!)
-// Author: fnoferin@cern.ch
-
-#include <TArrayF.h>
-#include <TCanvas.h>
-#include <TClonesArray.h>
-#include <TDatabasePDG.h>
-#include <TF1.h>
-#include <TH1.h>
-#include <TPDGCode.h>
-#include <TParticle.h>
-#include <TROOT.h>
-#include <TVirtualMC.h>
-
-#include "AliConst.h"
-#include "AliDecayer.h"
-#include "AliGenEventHeaderTunedPbPb.h"
-#include "AliLog.h"
-#include "AliRun.h"
-#include "AliGenTunedOnPbPb.h"
-
-ClassImp(AliGenTunedOnPbPb)
-
-// set default parameters for 10-20% centrality
-Int_t AliGenTunedOnPbPb::fgPdgInput[fgNspecies] = {211,-211,111,321,-321,2212,-2212,310,3122,-3122,333,3312,-3312,3334,-3334};
-Float_t AliGenTunedOnPbPb::fgMult[fgNspecies] = {450,450,450,70,70,21,21,70,20,20,8,2.4,2.4,0.4,0.4};
-
-Float_t AliGenTunedOnPbPb::fgV3Overv2 = 6.25000000000000000e-01;
-Float_t AliGenTunedOnPbPb::fgEventplane=0;
-
-TF1 *AliGenTunedOnPbPb::fgV2 = NULL;
-
-//_____________________________________________________________________________
-AliGenTunedOnPbPb::AliGenTunedOnPbPb()
- :AliGenerator(),
- fCmin(0.),
- fCmax(100.),
- fChangeWithCentrality(kFALSE),
- fYMaxValue(2.0)
-{
- //
- // Default constructor
- //
- SetCutVertexZ();
- SetPtRange();
-
- for(Int_t i=0;i < fgNspecies;i++){
- fgHSpectrum[i] = NULL;
- fgHv2[i] = NULL;
- }
-}
-
-//_____________________________________________________________________________
-AliGenTunedOnPbPb::~AliGenTunedOnPbPb()
-{
- //
- // Standard destructor
- //
-}
-
-//_____________________________________________________________________________
-void AliGenTunedOnPbPb::Init()
-{
- //
- // Initialise the generator
- //
-
- // define histos
-}
-
-
-//_____________________________________________________________________________
-void AliGenTunedOnPbPb::Generate()
-{
- //
- // Generate one trigger
- //
-
- Float_t avCentr = (fCmin+fCmax)*0.5;
-
- Float_t centrality = avCentr;
-
- if(fChangeWithCentrality) centrality = fCmin + gRandom->Rndm()*(fCmax-fCmin);
-
- SetParameters(centrality);
-
- TMCProcess statusPdg[fgNspecies] = {kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary};
-
- Float_t parV2scaling[3] = {1,0.202538,-0.00214468};
-
- Float_t scaleV2 = 1.0;
-
- TDatabasePDG *pdgD = TDatabasePDG::Instance();
-
- if(fChangeWithCentrality){
- parV2scaling[0] = 1. / (1 + parV2scaling[1]*avCentr + parV2scaling[2]*avCentr*avCentr); // normalize to average centrality
-
- scaleV2 = parV2scaling[0]*(1 + parV2scaling[1]*centrality + parV2scaling[2]*centrality*centrality); // apply the trand of v2 w.r.t. centrality
- }
-
- fgV2->SetParameter(2,fgV3Overv2);
-
- Float_t psi = gRandom->Rndm()*TMath::Pi();
- fgEventplane = psi;
- Float_t psi3 = gRandom->Rndm()*TMath::Pi()*2/3;
- fgV2->SetParameter(1,psi);
- fgV2->SetParameter(3,psi3);
-
- Int_t npart = 0;
-
- Float_t origin0[3];
- for (Int_t j=0;j<3;j++) origin0[j]=fOrigin[j];
- Float_t time;
- time = fTimeOrigin;
- if(fVertexSmear == kPerEvent) {
- Vertex();
- for (Int_t j=0; j < 3; j++) origin0[j] = fVertex[j];
- time = fTime;
- } // if kPerEvent
-
- printf("Generate event with centrality = %3.1f%c, |y|<%4.1f\n",centrality,'%',fYMaxValue);
-
- for(Int_t isp=0;isp < fgNspecies;isp++){
- if(! fgHSpectrum[isp]) continue;
-
- printf("Total number of %i = %f\n",fgPdgInput[isp],fgMult[isp]*2*fYMaxValue);
-
- for(Int_t ipart =0; ipart < fgMult[isp]*2*fYMaxValue; ipart++){
- Int_t pdg = fgPdgInput[isp];
-
- Double_t y = gRandom->Rndm()*2*fYMaxValue - fYMaxValue;
- Double_t pt = fgHSpectrum[isp]->GetRandom();
- if(fgHv2[isp]) fgV2->SetParameter(0,fgHv2[isp]->Interpolate(pt) * scaleV2);
- else fgV2->SetParameter(0,0.);
- Double_t mass = pdgD->GetParticle(pdg)->Mass();
- Double_t mt2 = pt*pt + mass*mass;
- Double_t phi = fgV2->GetRandom(-TMath::Pi(),TMath::Pi());
- Double_t px = pt*TMath::Cos(phi);
- Double_t py = pt*TMath::Sin(phi);
- y = TMath::TanH(y);
- Double_t pz = y*TMath::Sqrt(mt2)/TMath::Sqrt(1-y*y);
-// Double_t etot = TMath::Sqrt(mt2 + pz*pz);
- Float_t p[3] = {px,py,pz};
- Float_t polar[3] = {0.,0.,0.};
-
- PushTrack(1, -1, pdg, p, origin0, polar, time, statusPdg[isp], npart, 1., 1);
- KeepTrack(npart);
- npart++;
- }
- }
-
- TArrayF eventVertex;
- eventVertex.Set(3);
- eventVertex[0] = origin0[0];
- eventVertex[1] = origin0[1];
- eventVertex[2] = origin0[2];
-
-// Header
- AliGenEventHeaderTunedPbPb* header = new AliGenEventHeaderTunedPbPb("tunedOnPbPb");
-// Event Vertex
- header->SetPrimaryVertex(eventVertex);
- header->SetInteractionTime(time);
- header->SetNProduced(npart);
- header->SetCentrality(centrality);
- header->SetPsi2(psi);
- header->SetPsi3(psi3);
- gAlice->SetGenEventHeader(header);
-}
-
-void AliGenTunedOnPbPb::SetPtRange(Float_t ptmin, Float_t ptmax) {
- AliGenerator::SetPtRange(ptmin, ptmax);
-}
-//_____________________________________________________________________________
-TH1F *AliGenTunedOnPbPb::GetMultVsCentrality(Int_t species){
- char title[100];
- snprintf(title,100,"pdg = %i;centrality;dN/dy",fgPdgInput[species]);
- TH1F *h = new TH1F("multVsCentr",title,100,0,100);
-
- for(Int_t i=1;i<=100;i++){
- Float_t x = i+0.5;
- SetParameters(x);
- h->SetBinContent(i,fgMult[species]);
- }
-
- return h;
-}
-//_____________________________________________________________________________
-void AliGenTunedOnPbPb::SetParameters(Float_t centrality){
-
- if(!fgV2) fgV2 = new TF1("fv2Par","(1 + 2*[0]*cos(2*(x-[1])) + 2*[0]*[2]*cos(3*(x-[3])))",-TMath::Pi(),TMath::Pi());
-
- Float_t fr[9] = {0.,0.,0.,0.,0.,0.,0.,0.,0.};
-
- if(centrality < 7.5){
- fr[0] = (7.5 - centrality)/5.;
- fr[1] = (centrality-2.5)/5.;
- }
- else if(centrality < 15){
- fr[1] = (15-centrality)/7.5;
- fr[2] = (centrality-7.5)/7.5;
- }
- else if(centrality < 25){
- fr[2] = (25-centrality)/10.;
- fr[3] = (centrality-15)/10.;
- }
- else if(centrality < 35){
- fr[3] = (35-centrality)/10.;
- fr[4] = (centrality-25)/10.;
- }
- else if(centrality < 45){
- fr[4] = (45-centrality)/10.;
- fr[5] = (centrality-35)/10.;
- }
- else if(centrality < 55){
- fr[5] = (55-centrality)/10.;
- fr[6] = (centrality-45)/10.;
- }
- else if(centrality < 65){
- fr[6] = (65-centrality)/10.;
- fr[7] = (centrality-55)/10.;
- }
- else if(centrality < 75){
- fr[7] = (75-centrality)/10.;
- fr[8] = (centrality-65)/10.;
- }
- else{
- fr[8] = 1.0;
- }
-
- // parameters as a function of centrality
- Float_t multCent[9*fgNspecies] = {680.,680.,680.,110.,110.,34.,34.,110.,28.,28.,11.5,3.1,3.1,0.5,0.5,
- 560.,560.,560.,92.,92.,28.,28.,92.,24.,24.,9.,2.7,2.7,0.45,0.45,
- 450.,450.,450.,70.,70.,21.,21.,70.,20.,20.,8.,2.4,2.4,0.4,0.4,
- 302.,302.,302.,47.,47.,14.5,14.5,47.,14.,14.,5.5,1.5,1.5,0.2,0.2,
- 200.,200.,200.,30.,30.,9.6,9.6,30.,9.,9.,3.5,0.9,0.9,0.08,0.08,
- 120.,120.,120.,18.,18.,6.1,6.1,18.,5.1,5.1,2.2,0.6,0.6,0.055,0.055,
- 70.,70.,70.,10.4,10.4,3.6,3.6,10.4,2.6,2.6,1.4,0.36,0.36,0.035,0.035,
- 36.,36.,36.,5.25,5.25,2.,2.,5.25,1.5,1.5,0.5,0.02,0.02,0.015,0.015,
- 17.,17.,17.,2.3,2.3,0.9,0.9,2.3,0.6,0.6,0.16,0.006,0.006,0.005,0.005};
-
- Float_t v3Overv2Cent[9] = {1.2,0.82,0.625,0.5,0.45,0.4,0.37,0.3,0.3};
-
- // set parameters for current centrality
- for(Int_t i=0;i < fgNspecies;i++){
- fgMult[i] = 0;
-
- for(Int_t j=0;j < 9;j++){
- fgMult[i] += fr[j]*multCent[i+j*fgNspecies];
- }
- }
-
- fgV3Overv2 = 0;
- for(Int_t j=0;j < 9;j++)
- fgV3Overv2 += fr[j]*v3Overv2Cent[j];
-
- if(centrality > 80){
- for(Int_t i=0;i < fgNspecies;i++)
- fgMult[i] /= TMath::Log(centrality-77.);
- }
-
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff