/************************************************************************** * 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. * **************************************************************************/ /* $Id$ */ /// \ingroup macros /// \file genTestConfig.C /// \brief Configuration macro for event generator /// for MUON spectrometer Monte Carlo simulation Float_t EtaToTheta(Float_t arg); AliGenerator* genConfig(char option[6]="param") { cout << "Running genTestConfig.C ... " << endl; //======================================================================= // ******* GEANT STEERING parameters FOR ALICE SIMULATION ******* if ( gMC ) { gMC->SetProcess("DCAY",1); gMC->SetProcess("PAIR",1); gMC->SetProcess("COMP",1); gMC->SetProcess("PHOT",1); gMC->SetProcess("PFIS",0); gMC->SetProcess("DRAY",0); gMC->SetProcess("ANNI",1); gMC->SetProcess("BREM",1); gMC->SetProcess("MUNU",1); gMC->SetProcess("CKOV",1); gMC->SetProcess("HADR",1); gMC->SetProcess("LOSS",2); gMC->SetProcess("MULS",1); gMC->SetProcess("RAYL",1); Float_t cut = 1.e-3; // 1MeV cut by default Float_t tofmax = 1.e10; gMC->SetCut("CUTGAM", cut); gMC->SetCut("CUTELE", cut); gMC->SetCut("CUTNEU", cut); gMC->SetCut("CUTHAD", cut); gMC->SetCut("CUTMUO", cut); gMC->SetCut("BCUTE", cut); gMC->SetCut("BCUTM", cut); gMC->SetCut("DCUTE", cut); gMC->SetCut("DCUTM", cut); gMC->SetCut("PPCUTM", cut); gMC->SetCut("TOFMAX", tofmax); } // Set External decayer TVirtualMCDecayer *decayer = new AliDecayerPythia(); decayer->SetForceDecay(kAll); decayer->Init(); if ( gMC ) gMC->SetExternalDecayer(decayer); //======================================================================= // Examples of generators. Only option param is sistematically tested if (!strcmp(option,"box")) { AliGenBox * gener = new AliGenBox(1); gener->SetMomentumRange(20.,20.1); gener->SetPhiRange(0., 360.); gener->SetThetaRange(171.000,178.001); gener->SetPart(kMuonMinus); // Muons gener->SetOrigin(0.,0., 0.); //vertex position gener->SetSigma(0.0, 0.0, 0.0); //Sigma in (X,Y,Z) (cm) on IP position } if (!strcmp(option,"gun")) { AliGenFixed *gener = new AliGenFixed(1); gener->SetMomentum(10); gener->SetPhiRange(0.); gener->SetThetaRange(0.); gener->SetOrigin(30,30,-1200);//vertex position gener->SetPart(kMuonMinus); //GEANT particle type 13 is muons } if (!strcmp(option,"scan")) { AliGenScan *gener = new AliGenScan(-1); gener->SetMomentumRange(10,10); gener->SetPhiRange(0, 0); gener->SetThetaRange(-180, -180); //vertex position //gener->SetSigma(1,1,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetPart(kRootino); gener->SetRange(100, -300., 300., 100, -300., 300., 1, 2000, 2000); } if (!strcmp(option,"param")) { AliGenParam *gener = new AliGenParam(1, AliGenMUONlib::kUpsilon); gener->SetMomentumRange(0,999); gener->SetPtRange(0,100.); gener->SetPhiRange(0., 360.); gener->SetCutOnChild(1); gener->SetChildPhiRange(0.,360.); gener->SetChildThetaRange(171.0,178.0); gener->SetOrigin(0,0,0); //vertex position gener->SetSigma(0,0,0); //Sigma in (X,Y,Z) (cm) on IP position gener->SetForceDecay(kDiMuon); gener->SetTrackingFlag(1); } if (!strcmp(option,"paramJpsi")) { AliGenParam *gener = new AliGenParam(1, AliGenMUONlib::kJpsi); gener->SetMomentumRange(0,999); gener->SetPtRange(0,100.); gener->SetPhiRange(0., 360.); gener->SetCutOnChild(1); gener->SetChildPhiRange(0.,360.); gener->SetChildThetaRange(171.0,178.0); gener->SetOrigin(0,0,0); gener->SetForceDecay(kDiMuon); gener->SetTrackingFlag(1); } if (!strcmp(option,"hijing")) { //Hijing generator from ConfigPPR in macros AliGenHijing *gener = new AliGenHijing(-1); // centre of mass energy gener->SetEnergyCMS(5500.); // reference frame gener->SetReferenceFrame("CMS"); // projectile gener->SetProjectile("A", 208, 82); gener->SetTarget ("A", 208, 82); // tell hijing to keep the full parent child chain gener->KeepFullEvent(); // enable jet quenching gener->SetJetQuenching(1); // enable shadowing gener->SetShadowing(1); // neutral pion and heavy particle decays switched off gener->SetDecaysOff(1); // Don't track spectators gener->SetSpectators(0); // kinematic selection gener->SetSelectAll(0); // impact parameter range gener->SetImpactParameterRange(0., 5.); // 0. - 5. fm corresponds to ~10% most central } if (!strcmp(option,"muoncocktail")) { // Muon cocktail for PbPb AliGenMUONCocktail * gener = new AliGenMUONCocktail(); gener->SetPtRange(1.,100.); // Transverse momentum range gener->SetPhiRange(0.,360.); // Azimuthal angle range gener->SetYRange(-4.0,-2.5); gener->SetMuonPtCut(0.5); gener->SetMuonThetaCut(171.,178.); gener->SetMuonMultiplicity(2); gener->SetImpactParameterRange(0.,5.); // 10% most centra PbPb collisions gener->SetVertexSmear(kPerTrack); gener->SetOrigin(0,0,0); // Vertex position gener->SetSigma(0,0,0.0); // Sigma in (X,Y,Z) (cm) on IP position } gener->SetDecayer(decayer); gener->Init(); return gener; cout << "Running genGunConfig.C finished ... " << endl; } Float_t EtaToTheta(Float_t arg){ return (180./TMath::Pi())*2.*atan(exp(-arg)); }