[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.                  *
 **************************************************************************/

/*
$Log$
Revision 1.16  2003/04/08 10:22:05  morsch
Rapidity shift calculated in Init().

Revision 1.15  2003/04/04 08:13:26  morsch
Boost method added.

Revision 1.14  2003/01/14 10:50:19  alibrary
Cleanup of STEER coding conventions

Revision 1.13  2002/10/14 14:55:35  hristov
Merging the VirtualMC branch to the main development branch (HEAD)

Revision 1.5.4.2  2002/07/24 08:56:28  alibrary
Updating EVGEN on TVirtulaMC

Revision 1.12  2002/07/19 11:42:33  morsch
Use CalcMass()

Revision 1.11  2002/06/06 15:26:24  morsch
Correct child-selection for kPhiKK

Revision 1.10  2002/06/05 14:05:46  morsch
Decayer option kPhiKK for forced phi->K+K- decay added.

Revision 1.9  2002/05/30 14:58:29  morsch
Add pointer to AliGeometry to handle geometrical acceptance. (G. MArtinez)

Revision 1.8  2002/04/26 10:42:35  morsch
Case kNoDecayHeavy added. (N. Carrer)

Revision 1.7  2002/04/17 10:32:32  morsch
Coding Rule violations corrected.

Revision 1.6  2002/03/26 14:19:36  morsch
Saver calculation of rapdity.

Revision 1.5  2002/03/12 17:02:20  morsch
Change in calculation of rapidity, include case in which numerically e == pz.

Revision 1.4  2001/11/27 13:13:07  morsch
Maximum lifetime for long-lived particles to be put on the stack is parameter.
It can be set via SetMaximumLifetime(..).

Revision 1.3  2001/10/16 08:48:56  morsch
Common vertex related code moved to base class AliGenerator.

Revision 1.2  2001/10/15 08:15:51  morsch
Event vertex and vertex truncation setting moved into AliMC.

Revision 1.1  2001/07/13 10:56:00  morsch
AliGenMC base class for AliGenParam and AliGenPythia commonalities.

*/

// 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 <TMath.h>
#include <TPDGCode.h>
#include <TParticle.h>

#include "AliGenMC.h"

 ClassImp(AliGenMC)

AliGenMC::AliGenMC()
                 :AliGenerator()
{
// Default Constructor
    SetCutOnChild();
    SetChildMomentumRange();
    SetChildPtRange();
    SetChildPhiRange();
    SetChildThetaRange(); 
    SetChildYRange(); 
    SetMaximumLifetime();
    SetGeometryAcceptance();
    SetPdgCodeParticleforAcceptanceCut();
    SetNumberOfAcceptedParticles();
    SetTarget();
    SetProjectile();
}

AliGenMC::AliGenMC(Int_t npart)
                 :AliGenerator(npart)
{
//  Constructor
    SetCutOnChild();
    SetChildMomentumRange();
    SetChildPtRange();
    SetChildPhiRange();
    SetChildThetaRange();
    SetChildYRange(); 
// 
    fParentSelect.Set(8);
    fChildSelect.Set(8);
    for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
    SetMaximumLifetime();
    SetGeometryAcceptance();
    SetPdgCodeParticleforAcceptanceCut();
    SetNumberOfAcceptedParticles();
    SetTarget();
    SetProjectile();
}

AliGenMC::AliGenMC(const AliGenMC & mc)
{
// copy constructor
}

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

void AliGenMC::Init()
{
//
//  Initialization
    switch (fForceDecay) {
    case kSemiElectronic:
    case kDiElectron:
    case kBJpsiDiElectron:
    case kBPsiPrimeDiElectron:
	fChildSelect[0] = kElectron;	
	break;
    case kSemiMuonic:
    case kDiMuon:
    case kBJpsiDiMuon:
    case kBPsiPrimeDiMuon:
    case kPiToMu:
    case kKaToMu:
	fChildSelect[0]=kMuonMinus;
	break;
    case kHadronicD:
	fChildSelect[0]=kPiPlus;
	fChildSelect[1]=kKPlus;
	break;
    case kPhiKK:
	fChildSelect[0]=kKPlus;
    case kOmega:	
    case kAll:
    case kNoDecay:
    case kNoDecayHeavy:
	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(TParticle *particle, Int_t flag) const
{
// Perform kinematic selection
    Float_t px    = particle->Px();
    Float_t py    = particle->Py();
    Float_t pz    = particle->Pz();
    Float_t  e    = particle->Energy();
    Float_t pt    = particle->Pt();
    Float_t p     = particle->P();
    Float_t theta = particle->Theta();
    Float_t mass  = particle->GetCalcMass();
    Float_t mt2   = pt * pt + mass * mass;
    
    Float_t phi   = Float_t(TMath::ATan2(Double_t(py),Double_t(px)));
    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)
{
  Bool_t Check ;  // All fPdgCodeParticleforAcceptanceCut particles are in in the fGeometryAcceptance acceptance
  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*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);
    }
}


AliGenMC& AliGenMC::operator=(const  AliGenMC& rhs)
{
// Assignment operator
    return *this;
}
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
	16	/*
	17	$Log$
7cdba479	18	Revision 1.16 2003/04/08 10:22:05 morsch
	19	Rapidity shift calculated in Init().
	20
36d770d9	21	Revision 1.15 2003/04/04 08:13:26 morsch
	22	Boost method added.
	23
3b945a60	24	Revision 1.14 2003/01/14 10:50:19 alibrary
	25	Cleanup of STEER coding conventions
	26
116cbefd	27	Revision 1.13 2002/10/14 14:55:35 hristov
	28	Merging the VirtualMC branch to the main development branch (HEAD)
	29
b9d0a01d	30	Revision 1.5.4.2 2002/07/24 08:56:28 alibrary
	31	Updating EVGEN on TVirtulaMC
	32
	33	Revision 1.12 2002/07/19 11:42:33 morsch
	34	Use CalcMass()
	35
cf01ee36	36	Revision 1.11 2002/06/06 15:26:24 morsch
	37	Correct child-selection for kPhiKK
	38
027677ae	39	Revision 1.10 2002/06/05 14:05:46 morsch
	40	Decayer option kPhiKK for forced phi->K+K- decay added.
	41
00cb2f27	42	Revision 1.9 2002/05/30 14:58:29 morsch
	43	Add pointer to AliGeometry to handle geometrical acceptance. (G. MArtinez)
	44
65de9f86	45	Revision 1.8 2002/04/26 10:42:35 morsch
	46	Case kNoDecayHeavy added. (N. Carrer)
	47
d5f86442	48	Revision 1.7 2002/04/17 10:32:32 morsch
	49	Coding Rule violations corrected.
	50
62d0ae06	51	Revision 1.6 2002/03/26 14:19:36 morsch
	52	Saver calculation of rapdity.
	53
fef61e14	54	Revision 1.5 2002/03/12 17:02:20 morsch
	55	Change in calculation of rapidity, include case in which numerically e == pz.
	56
95450c6d	57	Revision 1.4 2001/11/27 13:13:07 morsch
	58	Maximum lifetime for long-lived particles to be put on the stack is parameter.
	59	It can be set via SetMaximumLifetime(..).
	60
47fc6bd5	61	Revision 1.3 2001/10/16 08:48:56 morsch
	62	Common vertex related code moved to base class AliGenerator.
	63
b80a8e41	64	Revision 1.2 2001/10/15 08:15:51 morsch
	65	Event vertex and vertex truncation setting moved into AliMC.
	66
dba8ac91	67	Revision 1.1 2001/07/13 10:56:00 morsch
	68	AliGenMC base class for AliGenParam and AliGenPythia commonalities.
	69
e36044d6	70	*/
e36044d6	71
62d0ae06	72	// Base class for generators using external MC generators.
	73	// For example AliGenPythia using Pythia.
	74	// Provides basic functionality: setting of kinematic cuts on
	75	// decay products and particle selection.
	76	// andreas.morsch@cern.ch
	77
65de9f86	78	#include <TMath.h>
116cbefd	79	#include <TPDGCode.h>
e36044d6	80	#include <TParticle.h>
e36044d6	81
116cbefd	82	#include "AliGenMC.h"
116cbefd	83
e36044d6	84	ClassImp(AliGenMC)
	85
	86	AliGenMC::AliGenMC()
	87	:AliGenerator()
	88	{
	89	// Default Constructor
	90	SetCutOnChild();
	91	SetChildMomentumRange();
	92	SetChildPtRange();
	93	SetChildPhiRange();
	94	SetChildThetaRange();
	95	SetChildYRange();
47fc6bd5	96	SetMaximumLifetime();
65de9f86	97	SetGeometryAcceptance();
	98	SetPdgCodeParticleforAcceptanceCut();
	99	SetNumberOfAcceptedParticles();
3b945a60	100	SetTarget();
3b945a60	101	SetProjectile();
e36044d6	102	}
	103
	104	AliGenMC::AliGenMC(Int_t npart)
	105	:AliGenerator(npart)
	106	{
	107	// Constructor
	108	SetCutOnChild();
	109	SetChildMomentumRange();
	110	SetChildPtRange();
	111	SetChildPhiRange();
	112	SetChildThetaRange();
	113	SetChildYRange();
	114	//
	115	fParentSelect.Set(8);
	116	fChildSelect.Set(8);
	117	for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
47fc6bd5	118	SetMaximumLifetime();
65de9f86	119	SetGeometryAcceptance();
	120	SetPdgCodeParticleforAcceptanceCut();
	121	SetNumberOfAcceptedParticles();
3b945a60	122	SetTarget();
3b945a60	123	SetProjectile();
e36044d6	124	}
	125
	126	AliGenMC::AliGenMC(const AliGenMC & mc)
	127	{
	128	// copy constructor
	129	}
	130
	131	AliGenMC::~AliGenMC()
	132	{
	133	// Destructor
	134	}
	135
	136	void AliGenMC::Init()
	137	{
	138	//
	139	// Initialization
	140	switch (fForceDecay) {
	141	case kSemiElectronic:
	142	case kDiElectron:
	143	case kBJpsiDiElectron:
	144	case kBPsiPrimeDiElectron:
47fc6bd5	145	fChildSelect[0] = kElectron;
e36044d6	146	break;
	147	case kSemiMuonic:
	148	case kDiMuon:
	149	case kBJpsiDiMuon:
	150	case kBPsiPrimeDiMuon:
	151	case kPiToMu:
	152	case kKaToMu:
	153	fChildSelect[0]=kMuonMinus;
	154	break;
	155	case kHadronicD:
	156	fChildSelect[0]=kPiPlus;
	157	fChildSelect[1]=kKPlus;
	158	break;
00cb2f27	159	case kPhiKK:
027677ae	160	fChildSelect[0]=kKPlus;
62d0ae06	161	case kOmega:
e36044d6	162	case kAll:
e36044d6	163	case kNoDecay:
d5f86442	164	case kNoDecayHeavy:
e36044d6	165	break;
e36044d6	166	}
36d770d9	167
	168	if (fZTarget != 0 && fAProjectile != 0)
	169	{
	170	fDyBoost = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) /
	171	(Double_t(fZTarget) * Double_t(fAProjectile)));
	172	}
e36044d6	173	}
	174
	175
62d0ae06	176	Bool_t AliGenMC::ParentSelected(Int_t ip) const
e36044d6	177	{
	178	// True if particle is in list of parent particles to be selected
	179	for (Int_t i=0; i<8; i++)
	180	{
62d0ae06	181	if (fParentSelect.At(i) == ip) return kTRUE;
e36044d6	182	}
	183	return kFALSE;
	184	}
	185
62d0ae06	186	Bool_t AliGenMC::ChildSelected(Int_t ip) const
e36044d6	187	{
	188	// True if particle is in list of decay products to be selected
	189	for (Int_t i=0; i<5; i++)
	190	{
62d0ae06	191	if (fChildSelect.At(i) == ip) return kTRUE;
e36044d6	192	}
	193	return kFALSE;
	194	}
	195
62d0ae06	196	Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) const
e36044d6	197	{
	198	// Perform kinematic selection
	199	Float_t px = particle->Px();
	200	Float_t py = particle->Py();
	201	Float_t pz = particle->Pz();
	202	Float_t e = particle->Energy();
	203	Float_t pt = particle->Pt();
	204	Float_t p = particle->P();
	205	Float_t theta = particle->Theta();
cf01ee36	206	Float_t mass = particle->GetCalcMass();
95450c6d	207	Float_t mt2 = pt * pt + mass * mass;
95450c6d	208
e36044d6	209	Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px)));
95450c6d	210	Double_t y, y0;
95450c6d	211
fef61e14	212	if (TMath::Abs(pz) < e) {
95450c6d	213	y = 0.5*TMath::Log((e+pz)/(e-pz));
	214	} else {
	215	y = 1.e10;
	216	}
e36044d6	217
95450c6d	218	if (mt2) {
95450c6d	219	y0 = 0.5TMath::Log((e+TMath::Abs(pz))(e+TMath::Abs(pz))/mt2);
e36044d6	220	} else {
95450c6d	221	if (TMath::Abs(y) < 1.e10) {
	222	y0 = y;
	223	} else {
	224	y0 = 1.e10;
	225	}
e36044d6	226	}
95450c6d	227
95450c6d	228	y = (pz < 0) ? -y0 : y0;
e36044d6	229
	230	if (flag == 0) {
	231	//
	232	// Primary particle cuts
	233	//
	234	// transverse momentum cut
	235	if (pt > fPtMax \|\| pt < fPtMin) {
	236	// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
	237	return kFALSE;
	238	}
	239	//
	240	// momentum cut
	241	if (p > fPMax \|\| p < fPMin) {
	242	// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
	243	return kFALSE;
	244	}
	245	//
	246	// theta cut
	247	if (theta > fThetaMax \|\| theta < fThetaMin) {
	248	// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
	249	return kFALSE;
	250	}
	251	//
	252	// rapidity cut
	253	if (y > fYMax \|\| y < fYMin) {
	254	// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
	255	return kFALSE;
	256	}
	257	//
	258	// phi cut
	259	if (phi > fPhiMax \|\| phi < fPhiMin) {
	260	// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
	261	return kFALSE;
	262	}
	263	} else {
	264	//
	265	// Decay product cuts
	266	//
	267	// transverse momentum cut
	268	if (pt > fChildPtMax \|\| pt < fChildPtMin) {
	269	// printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax);
	270	return kFALSE;
	271	}
	272	//
	273	// momentum cut
	274	if (p > fChildPMax \|\| p < fChildPMin) {
	275	// printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax);
	276	return kFALSE;
	277	}
	278	//
	279	// theta cut
	280	if (theta > fChildThetaMax \|\| theta < fChildThetaMin) {
	281	// printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax);
	282	return kFALSE;
	283	}
	284	//
	285	// rapidity cut
	286	if (y > fChildYMax \|\| y < fChildYMin) {
	287	// printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax);
	288	return kFALSE;
	289	}
	290	//
	291	// phi cut
	292	if (phi > fChildPhiMax \|\| phi < fChildPhiMin) {
293	// printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax);
294	return kFALSE;
295	}
296	}
297
e36044d6	298	return kTRUE;
	299	}
	300
65de9f86	301	Bool_t AliGenMC::CheckAcceptanceGeometry(Int_t np, TClonesArray* particles)
	302	{
	303	Bool_t Check ; // All fPdgCodeParticleforAcceptanceCut particles are in in the fGeometryAcceptance acceptance
	304	Int_t NumberOfPdgCodeParticleforAcceptanceCut=0;
	305	Int_t NumberOfAcceptedPdgCodeParticleforAcceptanceCut=0;
	306	TParticle * particle;
	307	Int_t i;
	308	for (i=0; i<np; i++) {
	309	particle = (TParticle *) particles->At(i);
	310	if( TMath::Abs( particle->GetPdgCode() ) == TMath::Abs( fPdgCodeParticleforAcceptanceCut ) ) {
	311	NumberOfPdgCodeParticleforAcceptanceCut++;
	312	if (fGeometryAcceptance->Impact(particle)) NumberOfAcceptedPdgCodeParticleforAcceptanceCut++;
	313	}
	314	}
	315	if ( NumberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
	316	Check = kTRUE;
	317	else
	318	Check = kFALSE;
	319
	320	return Check;
	321	}
	322
62d0ae06	323	Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) const
e36044d6	324	{
	325	//
	326	// If the particle is in a diffractive state, then take action accordingly
	327	switch (pdgcode) {
	328	case 91:
	329	return 92;
	330	case 110:
	331	//rho_diff0 -- difficult to translate, return rho0
	332	return 113;
	333	case 210:
	334	//pi_diffr+ -- change to pi+
	335	return 211;
	336	case 220:
	337	//omega_di0 -- change to omega0
	338	return 223;
	339	case 330:
	340	//phi_diff0 -- return phi0
	341	return 333;
	342	case 440:
	343	//J/psi_di0 -- return J/psi
	344	return 443;
	345	case 2110:
	346	//n_diffr -- return neutron
	347	return 2112;
	348	case 2210:
	349	//p_diffr+ -- return proton
	350	return 2212;
	351	}
	352	//non diffractive state -- return code unchanged
	353	return pdgcode;
	354	}
3b945a60	355
36d770d9	356	void AliGenMC::Boost()
3b945a60	357	{
	358	//
	359	// Boost cms into LHC lab frame
	360	//
	361
36d770d9	362	Double_t beta = TMath::TanH(fDyBoost);
3b945a60	363	Double_t gamma = 1./TMath::Sqrt(1.-beta*beta);
	364	Double_t gb = gamma * beta;
	365
7cdba479	366	// printf("\n Boosting particles to lab frame %f %f %f", fDyBoost, beta, gamma);
3b945a60	367
	368	Int_t i;
	369	Int_t np = fParticles->GetEntriesFast();
	370	for (i = 0; i < np; i++)
	371	{
	372	TParticle* iparticle = (TParticle*) fParticles->At(i);
	373
	374	Double_t e = iparticle->Energy();
	375	Double_t px = iparticle->Px();
	376	Double_t py = iparticle->Py();
	377	Double_t pz = iparticle->Pz();
	378
	379	Double_t eb = gamma * e - gb * pz;
	380	Double_t pzb = -gb * e + gamma * pz;
	381
	382	iparticle->SetMomentum(px, py, pzb, eb);
	383	}
	384	}
	385
	386
e36044d6	387
	388	AliGenMC& AliGenMC::operator=(const AliGenMC& rhs)
	389	{
	390	// Assignment operator
	391	return *this;
	392	}
	393