[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 1.3  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.

*/

#include "AliGenMC.h"
#include "AliPDG.h"
#include <TParticle.h>

 ClassImp(AliGenMC)

AliGenMC::AliGenMC()
                 :AliGenerator()
{
// Default Constructor
    SetCutOnChild();
    SetChildMomentumRange();
    SetChildPtRange();
    SetChildPhiRange();
    SetChildThetaRange(); 
    SetChildYRange(); 
    SetMaximumLifetime();
}

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();
}

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 kAll:
    case kNoDecay:
	break;
    }
}


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

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

Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag)
{
// 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 phi   = Float_t(TMath::ATan2(Double_t(py),Double_t(px)));
    Float_t y;
    
    if ( (e-pz)<=0 || (e+pz)<=0 ) {
	return kFALSE;
    } else {
      y = 0.5*TMath::Log((e+pz)/(e-pz));
    }
    
    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;
}

Int_t AliGenMC::CheckPDGCode(Int_t pdgcode)
{
//
//  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;
}
	  
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	$Log$
47fc6bd5	18	Revision 1.3 2001/10/16 08:48:56 morsch
	19	Common vertex related code moved to base class AliGenerator.
	20
b80a8e41	21	Revision 1.2 2001/10/15 08:15:51 morsch
	22	Event vertex and vertex truncation setting moved into AliMC.
	23
dba8ac91	24	Revision 1.1 2001/07/13 10:56:00 morsch
	25	AliGenMC base class for AliGenParam and AliGenPythia commonalities.
	26
e36044d6	27	*/
	28
	29	#include "AliGenMC.h"
	30	#include "AliPDG.h"
	31	#include <TParticle.h>
	32
	33	ClassImp(AliGenMC)
	34
	35	AliGenMC::AliGenMC()
	36	:AliGenerator()
	37	{
	38	// Default Constructor
	39	SetCutOnChild();
	40	SetChildMomentumRange();
	41	SetChildPtRange();
	42	SetChildPhiRange();
	43	SetChildThetaRange();
	44	SetChildYRange();
47fc6bd5	45	SetMaximumLifetime();
e36044d6	46	}
	47
	48	AliGenMC::AliGenMC(Int_t npart)
	49	:AliGenerator(npart)
	50	{
	51	// Constructor
	52	SetCutOnChild();
	53	SetChildMomentumRange();
	54	SetChildPtRange();
	55	SetChildPhiRange();
	56	SetChildThetaRange();
	57	SetChildYRange();
	58	//
	59	fParentSelect.Set(8);
	60	fChildSelect.Set(8);
	61	for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
47fc6bd5	62	SetMaximumLifetime();
e36044d6	63	}
	64
	65	AliGenMC::AliGenMC(const AliGenMC & mc)
	66	{
	67	// copy constructor
	68	}
	69
	70	AliGenMC::~AliGenMC()
	71	{
	72	// Destructor
	73	}
	74
	75	void AliGenMC::Init()
	76	{
	77	//
	78	// Initialization
	79	switch (fForceDecay) {
	80	case kSemiElectronic:
	81	case kDiElectron:
	82	case kBJpsiDiElectron:
	83	case kBPsiPrimeDiElectron:
47fc6bd5	84	fChildSelect[0] = kElectron;
e36044d6	85	break;
	86	case kSemiMuonic:
	87	case kDiMuon:
	88	case kBJpsiDiMuon:
	89	case kBPsiPrimeDiMuon:
	90	case kPiToMu:
	91	case kKaToMu:
	92	fChildSelect[0]=kMuonMinus;
	93	break;
	94	case kHadronicD:
	95	fChildSelect[0]=kPiPlus;
	96	fChildSelect[1]=kKPlus;
	97	break;
	98	case kAll:
	99	case kNoDecay:
	100	break;
	101	}
	102	}
	103
	104
	105	Bool_t AliGenMC::ParentSelected(Int_t ip)
	106	{
	107	// True if particle is in list of parent particles to be selected
	108	for (Int_t i=0; i<8; i++)
	109	{
	110	if (fParentSelect[i]==ip) return kTRUE;
	111	}
	112	return kFALSE;
	113	}
	114
	115	Bool_t AliGenMC::ChildSelected(Int_t ip)
	116	{
	117	// True if particle is in list of decay products to be selected
	118	for (Int_t i=0; i<5; i++)
	119	{
	120	if (fChildSelect[i]==ip) return kTRUE;
	121	}
	122	return kFALSE;
	123	}
	124
	125	Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag)
	126	{
	127	// Perform kinematic selection
	128	Float_t px = particle->Px();
	129	Float_t py = particle->Py();
	130	Float_t pz = particle->Pz();
	131	Float_t e = particle->Energy();
	132	Float_t pt = particle->Pt();
	133	Float_t p = particle->P();
	134	Float_t theta = particle->Theta();
	135	Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px)));
	136	Float_t y;
	137
	138	if ( (e-pz)<=0 \|\| (e+pz)<=0 ) {
	139	return kFALSE;
	140	} else {
	141	y = 0.5*TMath::Log((e+pz)/(e-pz));
	142	}
	143
	144	if (flag == 0) {
	145	//
	146	// Primary particle cuts
	147	//
	148	// transverse momentum cut
149	if (pt > fPtMax \|\| pt < fPtMin) {
150	// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
151	return kFALSE;
152	}
153	//
154	// momentum cut
155	if (p > fPMax \|\| p < fPMin) {
156	// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
157	return kFALSE;
158	}
159	//
160	// theta cut
161	if (theta > fThetaMax \|\| theta < fThetaMin) {
162	// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
163	return kFALSE;
164	}
165	//
166	// rapidity cut
167	if (y > fYMax \|\| y < fYMin) {
168	// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
169	return kFALSE;
170	}
171	//
172	// phi cut
173	if (phi > fPhiMax \|\| phi < fPhiMin) {
174	// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
175	return kFALSE;
176	}
177	} else {
178	//
179	// Decay product cuts
180	//
181	// transverse momentum cut
182	if (pt > fChildPtMax \|\| pt < fChildPtMin) {
183	// printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax);
184	return kFALSE;
185	}
186	//
187	// momentum cut
188	if (p > fChildPMax \|\| p < fChildPMin) {
189	// printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax);
190	return kFALSE;
191	}
192	//
193	// theta cut
194	if (theta > fChildThetaMax \|\| theta < fChildThetaMin) {
195	// printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax);
196	return kFALSE;
197	}
198	//
199	// rapidity cut
200	if (y > fChildYMax \|\| y < fChildYMin) {
201	// printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax);
202	return kFALSE;
203	}
204	//
205	// phi cut
206	if (phi > fChildPhiMax \|\| phi < fChildPhiMin) {
207	// printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax);
208	return kFALSE;
209	}
210	}
211
212
213
214	return kTRUE;
215	}
216
217	Int_t AliGenMC::CheckPDGCode(Int_t pdgcode)
218	{
219	//
220	// If the particle is in a diffractive state, then take action accordingly
221	switch (pdgcode) {
222	case 91:
223	return 92;
224	case 110:
225	//rho_diff0 -- difficult to translate, return rho0
226	return 113;
227	case 210:
228	//pi_diffr+ -- change to pi+
229	return 211;
230	case 220:
231	//omega_di0 -- change to omega0
232	return 223;
233	case 330:
234	//phi_diff0 -- return phi0
235	return 333;
236	case 440:
237	//J/psi_di0 -- return J/psi
238	return 443;
239	case 2110:
240	//n_diffr -- return neutron
241	return 2112;
242	case 2210:
243	//p_diffr+ -- return proton
244	return 2212;
245	}
246	//non diffractive state -- return code unchanged
247	return pdgcode;
248	}
249
250	AliGenMC& AliGenMC::operator=(const AliGenMC& rhs)
251	{
252	// Assignment operator
253	return *this;
254	}
255