[u/mrichter/AliRoot.git] / EVGEN / AliGenMC.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/

/* $Id$ */

// Base class for generators using external MC generators.
// For example AliGenPythia using Pythia.
// Provides basic functionality: setting of kinematic cuts on 
// decay products and particle selection.
// andreas.morsch@cern.ch

#include <TClonesArray.h>
#include <TMath.h>
#include <TPDGCode.h>
#include <TParticle.h>
#include <TLorentzVector.h>
#include <TVector3.h>

#include "AliGenMC.h"
#include "AliRun.h"
#include "AliGeometry.h"
#include "AliDecayer.h"

ClassImp(AliGenMC)

AliGenMC::AliGenMC()
    :AliGenerator(),
     fParticles("TParticle", 1000),
     fParentSelect(8),
     fChildSelect(8),
     fCutOnChild(0),
     fChildPtMin(0.),
     fChildPtMax(1.e10),
     fChildPMin(0.),
     fChildPMax(1.e10),
     fChildPhiMin(0.),
     fChildPhiMax(2. * TMath::Pi()),
     fChildThetaMin(0.),
     fChildThetaMax(TMath::Pi()),
     fChildYMin(-12.),
     fChildYMax(12.),
     fXingAngleX(0.),
     fXingAngleY(0.),
     fForceDecay(kAll),
     fMaxLifeTime(1.e-15),
     fDyBoost(0.),
     fGeometryAcceptance(0),
     fPdgCodeParticleforAcceptanceCut(0),
     fNumberOfAcceptedParticles(0),
     fNprimaries(0)
{
// Default Constructor
  fAProjectile = 1;
  fZProjectile = 1;
  fATarget = 1;
  fZTarget = 1;
  fProjectile = "P";
  fTarget = "P";
}

AliGenMC::AliGenMC(Int_t npart)
    :AliGenerator(npart),
     fParticles("TParticle", 1000),
     fParentSelect(8),
     fChildSelect(8),
     fCutOnChild(0),
     fChildPtMin(0.),
     fChildPtMax(1.e10),
     fChildPMin(0.),
     fChildPMax(1.e10),
     fChildPhiMin(0.),
     fChildPhiMax(2. * TMath::Pi()),
     fChildThetaMin(0.),
     fChildThetaMax(TMath::Pi()),
     fChildYMin(-12.),
     fChildYMax(12.),
     fXingAngleX(0.),
     fXingAngleY(0.),
     fForceDecay(kAll),
     fMaxLifeTime(1.e-15),
     fDyBoost(0.),
     fGeometryAcceptance(0),
     fPdgCodeParticleforAcceptanceCut(0),
     fNumberOfAcceptedParticles(0),
     fNprimaries(0)
{
//  Constructor
// 
  fAProjectile = 1;
  fZProjectile = 1;
  fATarget = 1;
  fZTarget = 1;
  fProjectile = "P";
  fTarget = "P";
  for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
}

AliGenMC::~AliGenMC()
{
// Destructor
}

void AliGenMC::Init()
{
//
//  Initialization
    switch (fForceDecay) {
    case kBSemiElectronic:
    case kSemiElectronic:
    case kDiElectron:
    case kBJpsiDiElectron:
    case kBPsiPrimeDiElectron:
    case kElectronEM:
    case kDiElectronEM:
	fChildSelect[0] = kElectron;	
	break;
    case kHardMuons:	
    case kBSemiMuonic:
    case kSemiMuonic:
    case kDiMuon:
    case kJpsiDiMuon:
    case kBJpsiDiMuon:
    case kBPsiPrimeDiMuon:
    case kPiToMu:
    case kKaToMu:
    case kWToMuon:
    case kWToCharmToMuon:
    case kZDiMuon:
    case kZDiElectron:
	fChildSelect[0]=kMuonMinus;
	break;
    case kWToCharm:
	break;
    case kHadronicD:
    case kHadronicDWithout4Bodies:
	fChildSelect[0]=kPiPlus;
	fChildSelect[1]=kKPlus;
	break;
    case kPhiKK:
	fChildSelect[0]=kKPlus;
	break;
    case kBJpsi:
	fChildSelect[0]= 443;
	break;
   case kChiToJpsiGammaToMuonMuon:
        fChildSelect[0]= 22;
        fChildSelect[1]= 13;
        break;
    case kChiToJpsiGammaToElectronElectron:
        fChildSelect[0]= 22;
        fChildSelect[1]= 11;
        break;
    case kLambda:	
	fChildSelect[0]= kProton;
        fChildSelect[1]= 211;
	break;
    case kPsiPrimeJpsiDiElectron:
        fChildSelect[0]= 211;
        fChildSelect[1]= 11;
	break;
    case kGammaEM:
        fChildSelect[0] = kGamma;	
        break;
    case kOmega:
    case kAll:
    case kAllMuonic:
    case kNoDecay:
    case kNoDecayHeavy:
    case kNoDecayBeauty:
    case kNeutralPion:
	break;
    }

    if (fZTarget != 0 && fAProjectile != 0) 
    {
	fDyBoost    = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) / 
					 (Double_t(fZTarget)    * Double_t(fAProjectile)));
    }
}


Bool_t AliGenMC::ParentSelected(Int_t ip) const
{
// True if particle is in list of parent particles to be selected
    for (Int_t i=0; i<8; i++)
    {
	if (fParentSelect.At(i) == ip) return kTRUE;
    }
    return kFALSE;
}

Bool_t AliGenMC::ChildSelected(Int_t ip) const
{
// True if particle is in list of decay products to be selected
    for (Int_t i=0; i<5; i++)
    {
	if (fChildSelect.At(i) == ip) return kTRUE;
    }
    return kFALSE;
}

Bool_t AliGenMC::KinematicSelection(const TParticle *particle, Int_t flag) const
{
// Perform kinematic selection
    Double_t pz    = particle->Pz();
    Double_t pt    = particle->Pt();
    Double_t p     = particle->P();
    Double_t theta = particle->Theta();
    Double_t mass  = particle->GetCalcMass();
    Double_t mt2   = pt * pt + mass * mass;
    Double_t phi   = particle->Phi();
    Double_t e     = particle->Energy();
    
    if (e == 0.)     
	e = TMath::Sqrt(p * p + mass * mass);

    
    Double_t y, y0;

    if (TMath::Abs(pz) <  e) {
	y = 0.5*TMath::Log((e+pz)/(e-pz));
    } else {
	y = 1.e10;
    }
    
    if (mt2) {
	y0 = 0.5*TMath::Log((e+TMath::Abs(pz))*(e+TMath::Abs(pz))/mt2);
    } else {
	if (TMath::Abs(y) < 1.e10) {
	    y0 = y;
	} else {
	    y0 = 1.e10;
	}
    }
      
    y = (pz < 0) ? -y0 : y0;
    
    if (flag == 0) {
//
// Primary particle cuts
//
//  transverse momentum cut    
	if (pt > fPtMax || pt < fPtMin) {
//	    printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
	    return kFALSE;
	}
//
// momentum cut
	if (p > fPMax || p < fPMin) {
//	    printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
	    return kFALSE;
	}
//
// theta cut
	if (theta > fThetaMax || theta < fThetaMin) {
//	    printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
	    return kFALSE;
	}
//
// rapidity cut
	if (y > fYMax || y < fYMin) {
//	    printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
	    return kFALSE;
	}
//
// phi cut
	if (phi > fPhiMax || phi < fPhiMin) {
//	    printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
	    return kFALSE;
	}
    } else {
//
// Decay product cuts
//
//  transverse momentum cut    
	if (pt > fChildPtMax || pt < fChildPtMin) {
//	    printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax);
	    return kFALSE;
	}
//
// momentum cut
	if (p > fChildPMax || p < fChildPMin) {
//	    printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax);
	    return kFALSE;
	}
//
// theta cut
	if (theta > fChildThetaMax || theta < fChildThetaMin) {
//	    printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax);
	    return kFALSE;
	}
//
// rapidity cut
	if (y > fChildYMax || y < fChildYMin) {
//	    printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax);
	    return kFALSE;
	}
//
// phi cut
	if (phi > fChildPhiMax || phi < fChildPhiMin) {
//	    printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax);
	    return kFALSE;
	}
    }
    
    return kTRUE;
}

Bool_t AliGenMC::CheckAcceptanceGeometry(Int_t np, TClonesArray* particles)
{
// Check the geometrical acceptance for particle.

  Bool_t check ;  
  Int_t numberOfPdgCodeParticleforAcceptanceCut = 0;
  Int_t numberOfAcceptedPdgCodeParticleforAcceptanceCut = 0;
  TParticle * particle;
  Int_t i;
  for (i = 0; i < np; i++) {
    particle =  (TParticle *) particles->At(i);
    if( TMath::Abs( particle->GetPdgCode() ) == TMath::Abs( fPdgCodeParticleforAcceptanceCut ) ) {
      numberOfPdgCodeParticleforAcceptanceCut++;
      if (fGeometryAcceptance->Impact(particle)) numberOfAcceptedPdgCodeParticleforAcceptanceCut++;
    }   
  }
  if ( numberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
    check = kTRUE;
  else
    check = kFALSE;

  return check;
}

Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) const
{
//
//  If the particle is in a diffractive state, then take action accordingly
  switch (pdgcode) {
  case 91:
    return 92;
  case 110:
    //rho_diff0 -- difficult to translate, return rho0
    return 113;
  case 210:
    //pi_diffr+ -- change to pi+
    return 211;
  case 220:
    //omega_di0 -- change to omega0
    return 223;
  case 330:
    //phi_diff0 -- return phi0
    return 333;
  case 440:
    //J/psi_di0 -- return J/psi
    return 443;
  case 2110:
    //n_diffr -- return neutron
    return 2112;
  case 2210:
    //p_diffr+ -- return proton
    return 2212;
  }
  //non diffractive state -- return code unchanged
  return pdgcode;
}

void AliGenMC::Boost()
{
//
// Boost cms into LHC lab frame
//

    Double_t beta  = TMath::TanH(fDyBoost);
    Double_t gamma = 1./TMath::Sqrt((1.-beta)*(1.+beta));
    Double_t gb    = gamma * beta;

    //    printf("\n Boosting particles to lab frame %f %f %f", fDyBoost, beta, gamma);
    
    Int_t i;
    Int_t np = fParticles.GetEntriesFast();
    for (i = 0; i < np; i++) 
    {
	TParticle* iparticle = (TParticle*) fParticles.At(i);

	Double_t e   = iparticle->Energy();
	Double_t px  = iparticle->Px();
	Double_t py  = iparticle->Py();
	Double_t pz  = iparticle->Pz();

	Double_t eb  = gamma * e -      gb * pz;
	Double_t pzb =   -gb * e +   gamma * pz;

	iparticle->SetMomentum(px, py, pzb, eb);
    }
}

void AliGenMC::BeamCrossAngle()
{
  // Applies a boost in the y-direction in order to take into account the 
  // beam crossing angle

  Double_t thetaPr0, phiPr0, pyPr2, pzPr2;
  TVector3 beta;
  
  thetaPr0 = fXingAngleY / 2.;
  phiPr0 = 0;

  // Momentum of the CMS system
  pyPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Sin(thetaPr0); 
  pzPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Cos(thetaPr0);

  TLorentzVector proj1Vect, proj2Vect, projVect;
  proj1Vect.SetPxPyPzE(0., pyPr2, pzPr2, fEnergyCMS/2);
  proj2Vect.SetPxPyPzE(0., pyPr2,-pzPr2, fEnergyCMS/2);
  projVect = proj1Vect + proj2Vect;
  beta=(1. / projVect.E()) * (projVect.Vect());

  Int_t i;
  Int_t np = fParticles.GetEntriesFast();
  for (i = 0; i < np; i++) 
    {
      TParticle* iparticle = (TParticle*) fParticles.At(i);

      Double_t e   = iparticle->Energy();
      Double_t px  = iparticle->Px();
      Double_t py  = iparticle->Py();
      Double_t pz  = iparticle->Pz();
      
      TLorentzVector partIn;
      partIn.SetPxPyPzE(px,py,pz,e);
      partIn.Boost(beta);
      iparticle->SetMomentum(partIn.Px(),partIn.Py(),partIn.Pz(),partIn.E());
    }
}


void AliGenMC::AddHeader(AliGenEventHeader* header)
{
    // Passes header either to the container or to gAlice
    if (fContainer) {
	fContainer->AddHeader(header);
    } else {
	gAlice->SetGenEventHeader(header);	
    }
}
Commit	Line	Data
e36044d6	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
88cb7938	16	/* $Id$ */
e36044d6	17
62d0ae06	18	// Base class for generators using external MC generators.
	19	// For example AliGenPythia using Pythia.
	20	// Provides basic functionality: setting of kinematic cuts on
	21	// decay products and particle selection.
	22	// andreas.morsch@cern.ch
	23
ac3faee4	24	#include <TClonesArray.h>
65de9f86	25	#include <TMath.h>
116cbefd	26	#include <TPDGCode.h>
e36044d6	27	#include <TParticle.h>
7eb751fe	28	#include <TLorentzVector.h>
7eb751fe	29	#include <TVector3.h>
e36044d6	30
116cbefd	31	#include "AliGenMC.h"
d97fb2bb	32	#include "AliRun.h"
ac3faee4	33	#include "AliGeometry.h"
4a33c50d	34	#include "AliDecayer.h"
116cbefd	35
198bb1c7	36	ClassImp(AliGenMC)
e36044d6	37
e36044d6	38	AliGenMC::AliGenMC()
1c56e311	39	:AliGenerator(),
969a210b	40	fParticles("TParticle", 1000),
1c56e311	41	fParentSelect(8),
	42	fChildSelect(8),
	43	fCutOnChild(0),
	44	fChildPtMin(0.),
	45	fChildPtMax(1.e10),
	46	fChildPMin(0.),
	47	fChildPMax(1.e10),
	48	fChildPhiMin(0.),
	49	fChildPhiMax(2. * TMath::Pi()),
	50	fChildThetaMin(0.),
	51	fChildThetaMax(TMath::Pi()),
	52	fChildYMin(-12.),
	53	fChildYMax(12.),
	54	fXingAngleX(0.),
	55	fXingAngleY(0.),
	56	fForceDecay(kAll),
	57	fMaxLifeTime(1.e-15),
1c56e311	58	fDyBoost(0.),
	59	fGeometryAcceptance(0),
	60	fPdgCodeParticleforAcceptanceCut(0),
d97fb2bb	61	fNumberOfAcceptedParticles(0),
e7c989e4	62	fNprimaries(0)
e36044d6	63	{
e36044d6	64	// Default Constructor
e7c989e4	65	fAProjectile = 1;
	66	fZProjectile = 1;
	67	fATarget = 1;
	68	fZTarget = 1;
	69	fProjectile = "P";
	70	fTarget = "P";
e36044d6	71	}
	72
	73	AliGenMC::AliGenMC(Int_t npart)
1c56e311	74	:AliGenerator(npart),
ea24f998	75	fParticles("TParticle", 1000),
1c56e311	76	fParentSelect(8),
	77	fChildSelect(8),
	78	fCutOnChild(0),
	79	fChildPtMin(0.),
	80	fChildPtMax(1.e10),
	81	fChildPMin(0.),
	82	fChildPMax(1.e10),
	83	fChildPhiMin(0.),
	84	fChildPhiMax(2. * TMath::Pi()),
	85	fChildThetaMin(0.),
	86	fChildThetaMax(TMath::Pi()),
	87	fChildYMin(-12.),
	88	fChildYMax(12.),
	89	fXingAngleX(0.),
	90	fXingAngleY(0.),
	91	fForceDecay(kAll),
	92	fMaxLifeTime(1.e-15),
1c56e311	93	fDyBoost(0.),
	94	fGeometryAcceptance(0),
	95	fPdgCodeParticleforAcceptanceCut(0),
d97fb2bb	96	fNumberOfAcceptedParticles(0),
e7c989e4	97	fNprimaries(0)
e36044d6	98	{
e36044d6	99	// Constructor
e36044d6	100	//
e7c989e4	101	fAProjectile = 1;
	102	fZProjectile = 1;
	103	fATarget = 1;
	104	fZTarget = 1;
	105	fProjectile = "P";
	106	fTarget = "P";
	107	for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
e36044d6	108	}
e36044d6	109
e36044d6	110	AliGenMC::~AliGenMC()
	111	{
	112	// Destructor
	113	}
	114
	115	void AliGenMC::Init()
	116	{
	117	//
	118	// Initialization
	119	switch (fForceDecay) {
e345c619	120	case kBSemiElectronic:
e36044d6	121	case kSemiElectronic:
	122	case kDiElectron:
	123	case kBJpsiDiElectron:
	124	case kBPsiPrimeDiElectron:
e40b9538	125	case kElectronEM:
e40b9538	126	case kDiElectronEM:
47fc6bd5	127	fChildSelect[0] = kElectron;
e36044d6	128	break;
2dcb5874	129	case kHardMuons:
e345c619	130	case kBSemiMuonic:
e36044d6	131	case kSemiMuonic:
e36044d6	132	case kDiMuon:
38a19176	133	case kJpsiDiMuon:
e36044d6	134	case kBJpsiDiMuon:
	135	case kBPsiPrimeDiMuon:
	136	case kPiToMu:
	137	case kKaToMu:
cd159249	138	case kWToMuon:
cd159249	139	case kWToCharmToMuon:
2f299526	140	case kZDiMuon:
f5b581a1	141	case kZDiElectron:
e36044d6	142	fChildSelect[0]=kMuonMinus;
e36044d6	143	break;
cd159249	144	case kWToCharm:
cd159249	145	break;
e36044d6	146	case kHadronicD:
af33df34	147	case kHadronicDWithout4Bodies:
e36044d6	148	fChildSelect[0]=kPiPlus;
	149	fChildSelect[1]=kKPlus;
	150	break;
00cb2f27	151	case kPhiKK:
027677ae	152	fChildSelect[0]=kKPlus;
56d47239	153	break;
56d47239	154	case kBJpsi:
00935af2	155	fChildSelect[0]= 443;
56d47239	156	break;
00935af2	157	case kChiToJpsiGammaToMuonMuon:
	158	fChildSelect[0]= 22;
	159	fChildSelect[1]= 13;
	160	break;
	161	case kChiToJpsiGammaToElectronElectron:
	162	fChildSelect[0]= 22;
	163	fChildSelect[1]= 11;
	164	break;
d3553100	165	case kLambda:
199786f7	166	fChildSelect[0]= kProton;
	167	fChildSelect[1]= 211;
	168	break;
9610308a	169	case kPsiPrimeJpsiDiElectron:
e40b9538	170	fChildSelect[0]= 211;
	171	fChildSelect[1]= 11;
	172	break;
	173	case kGammaEM:
	174	fChildSelect[0] = kGamma;
	175	break;
199786f7	176	case kOmega:
e36044d6	177	case kAll:
2b1f8257	178	case kAllMuonic:
e36044d6	179	case kNoDecay:
d5f86442	180	case kNoDecayHeavy:
1fefb2d4	181	case kNoDecayBeauty:
847af604	182	case kNeutralPion:
e36044d6	183	break;
e36044d6	184	}
36d770d9	185
	186	if (fZTarget != 0 && fAProjectile != 0)
	187	{
	188	fDyBoost = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) /
	189	(Double_t(fZTarget) * Double_t(fAProjectile)));
	190	}
e36044d6	191	}
	192
	193
62d0ae06	194	Bool_t AliGenMC::ParentSelected(Int_t ip) const
e36044d6	195	{
	196	// True if particle is in list of parent particles to be selected
	197	for (Int_t i=0; i<8; i++)
	198	{
62d0ae06	199	if (fParentSelect.At(i) == ip) return kTRUE;
e36044d6	200	}
	201	return kFALSE;
	202	}
	203
62d0ae06	204	Bool_t AliGenMC::ChildSelected(Int_t ip) const
e36044d6	205	{
	206	// True if particle is in list of decay products to be selected
	207	for (Int_t i=0; i<5; i++)
	208	{
62d0ae06	209	if (fChildSelect.At(i) == ip) return kTRUE;
e36044d6	210	}
	211	return kFALSE;
	212	}
	213
4a33c50d	214	Bool_t AliGenMC::KinematicSelection(const TParticle *particle, Int_t flag) const
e36044d6	215	{
e36044d6	216	// Perform kinematic selection
43a333ec	217	Double_t pz = particle->Pz();
43a333ec	218	Double_t pt = particle->Pt();
	219	Double_t p = particle->P();
	220	Double_t theta = particle->Theta();
	221	Double_t mass = particle->GetCalcMass();
	222	Double_t mt2 = pt * pt + mass * mass;
	223	Double_t phi = particle->Phi();
d643e262	224	Double_t e = particle->Energy();
	225
	226	if (e == 0.)
	227	e = TMath::Sqrt(p * p + mass * mass);
	228
95450c6d	229
95450c6d	230	Double_t y, y0;
95450c6d	231
fef61e14	232	if (TMath::Abs(pz) < e) {
95450c6d	233	y = 0.5*TMath::Log((e+pz)/(e-pz));
	234	} else {
	235	y = 1.e10;
	236	}
e36044d6	237
95450c6d	238	if (mt2) {
95450c6d	239	y0 = 0.5TMath::Log((e+TMath::Abs(pz))(e+TMath::Abs(pz))/mt2);
e36044d6	240	} else {
95450c6d	241	if (TMath::Abs(y) < 1.e10) {
	242	y0 = y;
	243	} else {
	244	y0 = 1.e10;
	245	}
e36044d6	246	}
95450c6d	247
95450c6d	248	y = (pz < 0) ? -y0 : y0;
e36044d6	249
	250	if (flag == 0) {
	251	//
	252	// Primary particle cuts
	253	//
	254	// transverse momentum cut
	255	if (pt > fPtMax \|\| pt < fPtMin) {
	256	// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
	257	return kFALSE;
	258	}
	259	//
	260	// momentum cut
	261	if (p > fPMax \|\| p < fPMin) {
	262	// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
	263	return kFALSE;
	264	}
	265	//
	266	// theta cut
	267	if (theta > fThetaMax \|\| theta < fThetaMin) {
	268	// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
	269	return kFALSE;
	270	}
	271	//
	272	// rapidity cut
	273	if (y > fYMax \|\| y < fYMin) {
	274	// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
	275	return kFALSE;
	276	}
	277	//
	278	// phi cut
	279	if (phi > fPhiMax \|\| phi < fPhiMin) {
	280	// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
	281	return kFALSE;
	282	}
	283	} else {
	284	//
	285	// Decay product cuts
	286	//
	287	// transverse momentum cut
	288	if (pt > fChildPtMax \|\| pt < fChildPtMin) {
	289	// printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax);
	290	return kFALSE;
	291	}
	292	//
	293	// momentum cut
	294	if (p > fChildPMax \|\| p < fChildPMin) {
	295	// printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax);
	296	return kFALSE;
	297	}
	298	//
	299	// theta cut
	300	if (theta > fChildThetaMax \|\| theta < fChildThetaMin) {
	301	// printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax);
	302	return kFALSE;
	303	}
	304	//
	305	// rapidity cut
	306	if (y > fChildYMax \|\| y < fChildYMin) {
	307	// printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax);
	308	return kFALSE;
	309	}
	310	//
	311	// phi cut
	312	if (phi > fChildPhiMax \|\| phi < fChildPhiMin) {
313	// printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax);
314	return kFALSE;
315	}
316	}
317
e36044d6	318	return kTRUE;
	319	}
	320
65de9f86	321	Bool_t AliGenMC::CheckAcceptanceGeometry(Int_t np, TClonesArray* particles)
65de9f86	322	{
e033748b	323	// Check the geometrical acceptance for particle.
	324
	325	Bool_t check ;
	326	Int_t numberOfPdgCodeParticleforAcceptanceCut = 0;
	327	Int_t numberOfAcceptedPdgCodeParticleforAcceptanceCut = 0;
65de9f86	328	TParticle * particle;
65de9f86	329	Int_t i;
e033748b	330	for (i = 0; i < np; i++) {
65de9f86	331	particle = (TParticle *) particles->At(i);
65de9f86	332	if( TMath::Abs( particle->GetPdgCode() ) == TMath::Abs( fPdgCodeParticleforAcceptanceCut ) ) {
e033748b	333	numberOfPdgCodeParticleforAcceptanceCut++;
e033748b	334	if (fGeometryAcceptance->Impact(particle)) numberOfAcceptedPdgCodeParticleforAcceptanceCut++;
65de9f86	335	}
65de9f86	336	}
e033748b	337	if ( numberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
e033748b	338	check = kTRUE;
65de9f86	339	else
e033748b	340	check = kFALSE;
65de9f86	341
e033748b	342	return check;
65de9f86	343	}
65de9f86	344
62d0ae06	345	Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) const
e36044d6	346	{
	347	//
	348	// If the particle is in a diffractive state, then take action accordingly
	349	switch (pdgcode) {
	350	case 91:
	351	return 92;
	352	case 110:
	353	//rho_diff0 -- difficult to translate, return rho0
	354	return 113;
	355	case 210:
	356	//pi_diffr+ -- change to pi+
	357	return 211;
	358	case 220:
	359	//omega_di0 -- change to omega0
	360	return 223;
	361	case 330:
	362	//phi_diff0 -- return phi0
	363	return 333;
	364	case 440:
	365	//J/psi_di0 -- return J/psi
	366	return 443;
	367	case 2110:
	368	//n_diffr -- return neutron
	369	return 2112;
	370	case 2210:
	371	//p_diffr+ -- return proton
	372	return 2212;
	373	}
	374	//non diffractive state -- return code unchanged
	375	return pdgcode;
	376	}
3b945a60	377
36d770d9	378	void AliGenMC::Boost()
3b945a60	379	{
	380	//
	381	// Boost cms into LHC lab frame
	382	//
	383
36d770d9	384	Double_t beta = TMath::TanH(fDyBoost);
60e55aee	385	Double_t gamma = 1./TMath::Sqrt((1.-beta)*(1.+beta));
3b945a60	386	Double_t gb = gamma * beta;
3b945a60	387
7cdba479	388	// printf("\n Boosting particles to lab frame %f %f %f", fDyBoost, beta, gamma);
3b945a60	389
3b945a60	390	Int_t i;
ea24f998	391	Int_t np = fParticles.GetEntriesFast();
3b945a60	392	for (i = 0; i < np; i++)
3b945a60	393	{
ea24f998	394	TParticle* iparticle = (TParticle*) fParticles.At(i);
3b945a60	395
	396	Double_t e = iparticle->Energy();
	397	Double_t px = iparticle->Px();
	398	Double_t py = iparticle->Py();
	399	Double_t pz = iparticle->Pz();
	400
	401	Double_t eb = gamma * e - gb * pz;
	402	Double_t pzb = -gb * e + gamma * pz;
	403
	404	iparticle->SetMomentum(px, py, pzb, eb);
	405	}
	406	}
d97fb2bb	407
7eb751fe	408	void AliGenMC::BeamCrossAngle()
	409	{
	410	// Applies a boost in the y-direction in order to take into account the
	411	// beam crossing angle
	412
	413	Double_t thetaPr0, phiPr0, pyPr2, pzPr2;
	414	TVector3 beta;
	415
	416	thetaPr0 = fXingAngleY / 2.;
	417	phiPr0 = 0;
	418
	419	// Momentum of the CMS system
	420	pyPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Sin(thetaPr0);
	421	pzPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Cos(thetaPr0);
	422
	423	TLorentzVector proj1Vect, proj2Vect, projVect;
	424	proj1Vect.SetPxPyPzE(0., pyPr2, pzPr2, fEnergyCMS/2);
	425	proj2Vect.SetPxPyPzE(0., pyPr2,-pzPr2, fEnergyCMS/2);
	426	projVect = proj1Vect + proj2Vect;
	427	beta=(1. / projVect.E()) * (projVect.Vect());
	428
	429	Int_t i;
	430	Int_t np = fParticles.GetEntriesFast();
	431	for (i = 0; i < np; i++)
	432	{
	433	TParticle* iparticle = (TParticle*) fParticles.At(i);
	434
	435	Double_t e = iparticle->Energy();
	436	Double_t px = iparticle->Px();
	437	Double_t py = iparticle->Py();
	438	Double_t pz = iparticle->Pz();
	439
	440	TLorentzVector partIn;
	441	partIn.SetPxPyPzE(px,py,pz,e);
	442	partIn.Boost(beta);
	443	iparticle->SetMomentum(partIn.Px(),partIn.Py(),partIn.Pz(),partIn.E());
	444	}
	445	}
	446
	447
d97fb2bb	448	void AliGenMC::AddHeader(AliGenEventHeader* header)
	449	{
	450	// Passes header either to the container or to gAlice
	451	if (fContainer) {
	452	fContainer->AddHeader(header);
	453	} else {
	454	gAlice->SetGenEventHeader(header);
	455	}
	456	}