-
/**************************************************************************
* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* *
#include "AliPythia.h"
#include "AliPythiaRndm.h"
-#include "../FASTSIM/AliFastGlauber.h"
-#include "../FASTSIM/AliQuenchingWeights.h"
+#include "AliFastGlauber.h"
+#include "AliQuenchingWeights.h"
+#include "AliOmegaDalitz.h"
#include "TVector3.h"
+#include "TLorentzVector.h"
+#include "PyquenCommon.h"
ClassImp(AliPythia)
# define pyrobo pyrobo_
# define pyquen pyquen_
# define pyevnw pyevnw_
+# define pyshowq pyshowq_
+# define qpygin0 qpygin0_
+# define pytune pytune_
+# define py2ent py2ent_
# define type_of_call
#else
# define pyclus PYCLUS
# define pyrobo PYROBO
# define pyquen PYQUEN
# define pyevnw PYEVNW
+# define pyshowq PYSHOWQ
+# define qpygin0 QPYGIN0
+# define pytune PYTUNE
+# define py2ent PY2ENT
# define type_of_call _stdcall
#endif
extern "C" void type_of_call pyrobo(Int_t &, Int_t &, Double_t &, Double_t &, Double_t &, Double_t &, Double_t &);
extern "C" void type_of_call pyquen(Double_t &, Int_t &, Double_t &);
extern "C" void type_of_call pyevnw(){;}
-
+extern "C" void type_of_call pyshowq(Int_t &, Int_t &, Double_t &);
+extern "C" void type_of_call pytune(Int_t &);
+extern "C" void type_of_call py2ent(Int_t &, Int_t&, Int_t&, Double_t&);
+extern "C" void type_of_call qpygin0();
//_____________________________________________________________________________
AliPythia* AliPythia::fgAliPythia=NULL;
fStrucFunc(kCTEQ5L),
fXJet(0.),
fYJet(0.),
+ fNGmax(30),
+ fZmax(0.97),
fGlauber(0),
- fQuenchingWeights(0)
+ fQuenchingWeights(0),
+ fItune(-1),
+ fOmegaDalitz()
{
// Default Constructor
//
AliPythiaRndm::SetPythiaRandom(GetRandom());
fGlauber = 0;
fQuenchingWeights = 0;
+ Int_t i = 0;
+ for (i = 0; i < 501; i++) fDefMDCY[i] = 0;
+ for (i = 0; i < 2001; i++) fDefMDME[i] = 0;
+ for (i = 0; i < 4; i++) fZQuench[i] = 0;
}
AliPythia::AliPythia(const AliPythia& pythia):
fStrucFunc(kCTEQ5L),
fXJet(0.),
fYJet(0.),
+ fNGmax(30),
+ fZmax(0.97),
fGlauber(0),
- fQuenchingWeights(0)
+ fQuenchingWeights(0),
+ fItune(-1),
+ fOmegaDalitz()
{
// Copy Constructor
+ Int_t i;
+ for (i = 0; i < 501; i++) fDefMDCY[i] = 0;
+ for (i = 0; i < 2001; i++) fDefMDME[i] = 0;
+ for (i = 0; i < 4; i++) fZQuench[i] = 0;
pythia.Copy(*this);
}
-void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc)
+void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc, Int_t itune)
{
// Initialise the process to generate
if (!AliPythiaRndm::GetPythiaRandom())
AliPythiaRndm::SetPythiaRandom(GetRandom());
+ fItune = itune;
+
fProcess = process;
fEcms = energy;
fStrucFunc = strucfunc;
//...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-.
- SetMDCY(Pycomp(111) ,1,0);
- SetMDCY(Pycomp(310) ,1,0);
- SetMDCY(Pycomp(3122),1,0);
- SetMDCY(Pycomp(3112),1,0);
- SetMDCY(Pycomp(3212),1,0);
- SetMDCY(Pycomp(3222),1,0);
- SetMDCY(Pycomp(3312),1,0);
- SetMDCY(Pycomp(3322),1,0);
- SetMDCY(Pycomp(3334),1,0);
+ SetMDCY(Pycomp(111) ,1,0); // pi0
+ SetMDCY(Pycomp(310) ,1,0); // K0S
+ SetMDCY(Pycomp(3122),1,0); // kLambda
+ SetMDCY(Pycomp(3112),1,0); // sigma -
+ SetMDCY(Pycomp(3222),1,0); // sigma +
+ SetMDCY(Pycomp(3312),1,0); // xi -
+ SetMDCY(Pycomp(3322),1,0); // xi 0
+ SetMDCY(Pycomp(3334),1,0); // omega-
// Select structure function
SetMSTP(52,2);
- SetMSTP(51,strucfunc);
+ SetMSTP(51, AliStructFuncType::PDFsetIndex(strucfunc));
// Particles produced in string fragmentation point directly to either of the two endpoints
// of the string (depending in the side they were generated from).
SetMSTU(16,2);
AtlasTuning();
break;
- case kPyMbDefault:
+
+ case kPyMbAtlasTuneMC09:
// Minimum Bias pp-Collisions
//
//
SetMSUB(94,1); // double diffraction
SetMSUB(95,1); // low pt production
+ AtlasTuning_MC09();
+ break;
+
+ case kPyMbWithDirectPhoton:
+// Minimum Bias pp-Collisions with direct photon processes added
+//
+//
+// select Pythia min. bias model
+ SetMSEL(0);
+ SetMSUB(92,1); // single diffraction AB-->XB
+ SetMSUB(93,1); // single diffraction AB-->AX
+ SetMSUB(94,1); // double diffraction
+ SetMSUB(95,1); // low pt production
+
+ SetMSUB(14,1); //
+ SetMSUB(18,1); //
+ SetMSUB(29,1); //
+ SetMSUB(114,1); //
+ SetMSUB(115,1); //
+
+
+ AtlasTuning();
+ break;
+
+ case kPyMbDefault:
+// Minimum Bias pp-Collisions
+//
+//
+// select Pythia min. bias model
+ SetMSEL(0);
+ SetMSUB(92,1); // single diffraction AB-->XB
+ SetMSUB(93,1); // single diffraction AB-->AX
+ SetMSUB(94,1); // double diffraction
+ SetMSUB(95,1); // low pt production
break;
case kPyLhwgMb:
// Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120
SetMSUB(94,1); // double diffraction
SetMSUB(95,1); // low pt production
- SetMSTP(51,kCTEQ6ll); // CTEQ6ll pdf
+ SetMSTP(51,AliStructFuncType::PDFsetIndex(kCTEQ6ll)); // CTEQ6ll pdf
SetMSTP(52,2);
SetMSTP(68,1);
SetMSTP(70,2);
SetMSEL(1);
// Pythia Tune A (CDF)
//
- SetPARP(67,4.); // Regulates Initial State Radiation
+ SetPARP(67,2.5); // Regulates Initial State Radiation (value from best fit to D0 dijet analysis)
SetMSTP(82,4); // Double Gaussian Model
SetPARP(82,2.0); // [GeV] PT_min at Ref. energy
SetPARP(84,0.4); // Core radius
SetPARP(85,0.90) ; // Regulates gluon prod. mechanism
SetPARP(86,0.95); // Regulates gluon prod. mechanism
SetPARP(89,1800.); // [GeV] Ref. energy
- SetPARP(90,0.25); // 2*epsilon (exponent in power law)
+ SetPARP(90,0.25); // 2*epsilon (exponent in power law)
break;
case kPyDirectGamma:
SetMSEL(10);
case kPyD0ppMNR:
case kPyDPlusppMNR:
case kPyDPlusStrangeppMNR:
+ case kPyLambdacppMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// c-cbar single inclusive and double differential distributions.
// Set b-quark mass
SetPMAS(5,1,4.75);
break;
+ case kPyBeautyJets:
case kPyBeautyppMNRwmi:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
}
//
// Initialize PYTHIA
+//
+// Select the tune
+ if (itune > -1) Pytune(itune);
+
+//
SetMSTP(41,1); // all resonance decays switched on
-
Initialize("CMS","p","p",fEcms);
-
+ fOmegaDalitz.Init();
}
Int_t AliPythia::CheckedLuComp(Int_t kf)
return kc;
}
-void AliPythia::SetNuclei(Int_t a1, Int_t a2)
+void AliPythia::SetNuclei(Int_t a1, Int_t a2, Int_t pdf)
{
// Treat protons as inside nuclei with mass numbers a1 and a2
// The MSTP array in the PYPARS common block is used to enable and
// If the following mass number both not equal zero, nuclear corrections of the stf are used.
// MSTP(192) : Mass number of nucleus side 1
// MSTP(193) : Mass number of nucleus side 2
+// MSTP(194) : Nuclear structure function: 0: EKS98 1:EPS08
SetMSTP(52,2);
SetMSTP(192, a1);
- SetMSTP(193, a2);
+ SetMSTP(193, a2);
+ SetMSTP(194, pdf);
}
pyrobo(imi, ima, the, phi, bex, bey, bez);
}
+void AliPythia::Pytune(Int_t itune)
+{
+/*
+C
+C ITUNE NAME (detailed descriptions below)
+C 0 Default : No settings changed => linked Pythia version's defaults.
+C ====== Old UE, Q2-ordered showers ==========================================
+C 100 A : Rick Field's CDF Tune A
+C 101 AW : Rick Field's CDF Tune AW
+C 102 BW : Rick Field's CDF Tune BW
+C 103 DW : Rick Field's CDF Tune DW
+C 104 DWT : Rick Field's CDF Tune DW with slower UE energy scaling
+C 105 QW : Rick Field's CDF Tune QW (NB: needs CTEQ6.1M pdfs externally)
+C 106 ATLAS-DC2: Arthur Moraes' (old) ATLAS tune (ATLAS DC2 / Rome)
+C 107 ACR : Tune A modified with annealing CR
+C 108 D6 : Rick Field's CDF Tune D6 (NB: needs CTEQ6L pdfs externally)
+C 109 D6T : Rick Field's CDF Tune D6T (NB: needs CTEQ6L pdfs externally)
+C ====== Intermediate Models =================================================
+C 200 IM 1 : Intermediate model: new UE, Q2-ordered showers, annealing CR
+C 201 APT : Tune A modified to use pT-ordered final-state showers
+C ====== New UE, interleaved pT-ordered showers, annealing CR ================
+C 300 S0 : Sandhoff-Skands Tune 0
+C 301 S1 : Sandhoff-Skands Tune 1
+C 302 S2 : Sandhoff-Skands Tune 2
+C 303 S0A : S0 with "Tune A" UE energy scaling
+C 304 NOCR : New UE "best try" without colour reconnections
+C 305 Old : New UE, original (primitive) colour reconnections
+C 306 ATLAS-CSC: Arthur Moraes' (new) ATLAS tune (needs CTEQ6L externally)
+C ======= The Uppsala models =================================================
+C ( NB! must be run with special modified Pythia 6.215 version )
+C ( available from http://www.isv.uu.se/thep/MC/scigal/ )
+C 400 GAL 0 : Generalized area-law model. Old parameters
+C 401 SCI 0 : Soft-Colour-Interaction model. Old parameters
+C 402 GAL 1 : Generalized area-law model. Tevatron MB retuned (Skands)
+*/
+ pytune(itune);
+}
+
+void AliPythia::Py2ent(Int_t idx, Int_t pdg1, Int_t pdg2, Double_t p){
+ // Inset 2-parton system at line idx
+ py2ent(idx, pdg1, pdg2, p);
+}
-void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod)
+void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod, Float_t zmax, Int_t ngmax)
{
// Initializes
// (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann
// (2) The nuclear geometry using the Glauber Model
//
- fGlauber = new AliFastGlauber();
+ fGlauber = AliFastGlauber::Instance();
fGlauber->Init(2);
fGlauber->SetCentralityClass(cMin, cMax);
fQuenchingWeights->InitMult();
fQuenchingWeights->SetK(k);
fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod));
+ fNGmax = ngmax;
+ fZmax = zmax;
+
}
Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0., phi = 0.;
Double_t pxq[4], pyq[4], pzq[4], eq[4], yq[4], mq[4], pq[4], phiq[4], thetaq[4], ptq[4];
Bool_t quenched[4];
- Double_t wjtKick[4];
+ Double_t wjtKick[4] = {0., 0., 0., 0.};
Int_t nGluon[4];
Int_t qPdg[4];
Int_t imo, kst, pdg;
//
// Avoid complete loss
//
- if (fZQuench[j] == 1.) fZQuench[j] = 0.97;
+ if (fZQuench[j] > fZmax) fZQuench[j] = fZmax;
//
// Some debug printing
if (!quenched[isys]) continue;
nGluon[isys] = 1 + Int_t(fZQuench[isys] / (1. - fZQuench[isys]));
- if (nGluon[isys] > 30) nGluon[isys] = 30;
+ if (nGluon[isys] > fNGmax) nGluon[isys] = fNGmax;
zquench[isys] = 1. - TMath::Power(1. - fZQuench[isys], 1./Double_t(nGluon[isys]));
wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys]));
//
// Calculate new px, py
//
- Double_t pxNew = jtNew / jt * pxs;
- Double_t pyNew = jtNew / jt * pys;
+ Double_t pxNew = 0;
+ Double_t pyNew = 0;
+ if (jt>0) {
+ pxNew = jtNew / jt * pxs;
+ pyNew = jtNew / jt * pys;
+ }
// Double_t dpx = pxs - pxNew;
// Double_t dpy = pys - pyNew;
// Double_t dpz = pl - plNew;
//
// Isotropic decay ????
Double_t cost = 2. * gRandom->Rndm() - 1.;
- Double_t sint = TMath::Sqrt(1. - cost * cost);
- Double_t phi = 2. * TMath::Pi() * gRandom->Rndm();
+ Double_t sint = TMath::Sqrt((1.-cost)*(1.+cost));
+ Double_t phis = 2. * TMath::Pi() * gRandom->Rndm();
Double_t pz1 = pst * cost;
Double_t pz2 = -pst * cost;
Double_t pt1 = pst * sint;
Double_t pt2 = -pst * sint;
- Double_t px1 = pt1 * TMath::Cos(phi);
- Double_t py1 = pt1 * TMath::Sin(phi);
- Double_t px2 = pt2 * TMath::Cos(phi);
- Double_t py2 = pt2 * TMath::Sin(phi);
+ Double_t px1 = pt1 * TMath::Cos(phis);
+ Double_t py1 = pt1 * TMath::Sin(phis);
+ Double_t px2 = pt2 * TMath::Cos(phis);
+ Double_t py2 = pt2 * TMath::Sin(phis);
fPyjets->P[0][iGlu] = px1;
fPyjets->P[1][iGlu] = py1;
void AliPythia::Pyquen(Double_t a, Int_t ibf, Double_t b)
{
// Igor Lokthine's quenching routine
+ // http://lokhtin.web.cern.ch/lokhtin/pyquen/pyquen.txt
+
pyquen(a, ibf, b);
}
+void AliPythia::SetPyquenParameters(Double_t t0, Double_t tau0, Int_t nf, Int_t iengl, Int_t iangl)
+{
+ // Set the parameters for the PYQUEN package.
+ // See comments in PyquenCommon.h
+
+
+ PYQPAR.t0 = t0;
+ PYQPAR.tau0 = tau0;
+ PYQPAR.nf = nf;
+ PYQPAR.iengl = iengl;
+ PYQPAR.iangl = iangl;
+}
+
+
void AliPythia::Pyevnw()
{
// New multiple interaction scenario
pyevnw();
}
+void AliPythia::Pyshowq(Int_t ip1, Int_t ip2, Double_t qmax)
+{
+ // Call medium-modified Pythia jet reconstruction algorithm
+ //
+ pyshowq(ip1, ip2, qmax);
+}
+ void AliPythia::Qpygin0()
+ {
+ // New multiple interaction scenario
+ qpygin0();
+ }
+
void AliPythia::GetQuenchingParameters(Double_t& xp, Double_t& yp, Double_t z[4])
{
// Return event specific quenching parameters
//
SetMSEL(1);
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81, 0.);
- SetPARP(82, 0.);
+
+ if (fItune < 0) {
+ // No multiple interactions
+ SetMSTP(81,0);
+ SetPARP(81, 0.);
+ SetPARP(82, 0.);
+ }
// Initial/final parton shower on (Pythia default)
SetMSTP(61,1);
SetMSTP(71,1);
{
//
// Configuration for the ATLAS tuning
- SetMSTP(51, kCTEQ5L); // CTEQ5L pdf
- SetMSTP(81,1); // Multiple Interactions ON
- SetMSTP(82,4); // Double Gaussian Model
- SetPARP(81,1.9); // Min. pt for multiple interactions (default in 6.2-14)
- SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
- SetPARP(89,1000.); // [GeV] Ref. energy
- SetPARP(90,0.16); // 2*epsilon (exponent in power law)
- SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
- SetPARP(84,0.5); // Core radius
- SetPARP(85,0.33); // Regulates gluon prod. mechanism
- SetPARP(86,0.66); // Regulates gluon prod. mechanism
- SetPARP(67,1); // Regulates Initial State Radiation
+ if (fItune > -1) return;
+ printf("ATLAS TUNE \n");
+
+ SetMSTP(51, AliStructFuncType::PDFsetIndex(kCTEQ5L)); // CTEQ5L pdf
+ SetMSTP(81,1); // Multiple Interactions ON
+ SetMSTP(82,4); // Double Gaussian Model
+ SetPARP(81,1.9); // Min. pt for multiple interactions (default in 6.2-14)
+ SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
+ SetPARP(89,1000.); // [GeV] Ref. energy
+ SetPARP(90,0.16); // 2*epsilon (exponent in power law)
+ SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
+ SetPARP(84,0.5); // Core radius
+ SetPARP(85,0.33); // Regulates gluon prod. mechanism
+ SetPARP(86,0.66); // Regulates gluon prod. mechanism
+ SetPARP(67,1); // Regulates Initial State Radiation
+}
+
+void AliPythia::AtlasTuning_MC09()
+{
+ //
+ // Configuration for the ATLAS tuning
+ if (fItune > -1) return;
+ printf("ATLAS New TUNE MC09\n");
+ SetMSTP(81,21); // treatment for MI, ISR, FSR and beam remnants: MI on, new model
+ SetMSTP(82, 4); // Double Gaussian Model
+ SetMSTP(52, 2); // External PDF
+ SetMSTP(51, 20650); // MRST LO*
+
+
+ SetMSTP(70, 0); // (was 2: def manual 1, def code 0) virtuality scale for ISR
+ SetMSTP(72, 1); // (was 0: def 1) maximum scale for FSR
+ SetMSTP(88, 1); // (was 0: def 1) strategy for qq junction to di-quark or baryon in beam remnant
+ SetMSTP(90, 0); // (was 1: def 0) strategy of compensate the primordial kT
+
+ SetPARP(78, 0.3); // the amount of color reconnection in the final state
+ SetPARP(80, 0.1); // probability of color partons kicked out from beam remnant
+ SetPARP(82, 2.3); // [GeV] PT_min at Ref. energy
+ SetPARP(83, 0.8); // Core density in proton matter distribution (def.value)
+ SetPARP(84, 0.7); // Core radius
+ SetPARP(90, 0.25); // 2*epsilon (exponent in power law)
+ SetPARJ(81, 0.29); // (was 0.14: def 0.29) Labmda value in running alpha_s for parton showers
+
+ SetMSTP(95, 6);
+ SetPARJ(41, 0.3); // a and b parameters of the symmm. Lund FF
+ SetPARJ(42, 0.58);
+ SetPARJ(46, 0.75); // mod. of the Lund FF for heavy end-point quarks
+ SetPARP(89,1800.); // [GeV] Ref. energy
}
AliPythia& AliPythia::operator=(const AliPythia& rhs)
//
Fatal("Copy","Not implemented!\n");
}
+
+void AliPythia::DalitzDecays()
+{
+
+ //
+ // Replace all omega dalitz decays with the correct matrix element decays
+ //
+ Int_t nt = fPyjets->N;
+ for (Int_t i = 0; i < nt; i++) {
+ if (fPyjets->K[1][i] != 223) continue;
+ Int_t fd = fPyjets->K[3][i] - 1;
+ Int_t ld = fPyjets->K[4][i] - 1;
+ if (fd < 0) continue;
+ if ((ld - fd) != 2) continue;
+ if ((fPyjets->K[1][fd] != 111) ||
+ ((TMath::Abs(fPyjets->K[1][fd+1]) != 11) && (TMath::Abs(fPyjets->K[1][fd+1]) != 13)))
+ continue;
+ TLorentzVector omega(fPyjets->P[0][i], fPyjets->P[1][i], fPyjets->P[2][i], fPyjets->P[3][i]);
+ Int_t pdg = TMath::Abs(fPyjets->K[1][fd+1]);
+ fOmegaDalitz.Decay(pdg, &omega);
+ for (Int_t j = 0; j < 3; j++) {
+ for (Int_t k = 0; k < 4; k++) {
+ TLorentzVector vec = (fOmegaDalitz.Products())[2-j];
+ fPyjets->P[k][fd+j] = vec[k];
+ }
+ }
+ }
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff