* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.7 2001/03/09 13:01:41 morsch
-- enum constants for paramterisation type (particle family) moved to AliGen*lib.h
-- use AliGenGSIlib::kUpsilon, AliGenPHOSlib::kEtaPrime to access the constants
-
-Revision 1.6 2000/11/30 07:12:50 alibrary
-Introducing new Rndm and QA classes
-
-Revision 1.5 2000/06/29 21:08:27 morsch
-All paramatrisation libraries derive from the pure virtual base class AliGenLib.
-This allows to pass a pointer to a library directly to AliGenParam and avoids the
-use of function pointers in Config.C.
-
-Revision 1.4 2000/06/14 15:21:05 morsch
-Include clean-up (IH)
-
-Revision 1.3 2000/06/09 20:32:54 morsch
-All coding rule violations except RS3 corrected
-
-Revision 1.2 1999/11/04 11:30:48 fca
-Improve comments
-
-Revision 1.1 1999/11/03 17:43:20 fca
-New version from G.Martinez & A.Morsch
-
-*/
+/* $Id$ */
//======================================================================
// AliGenPHOSlib class contains parameterizations of the
// GPS @ SUBATECH, Nantes , France (October 1999)
// http://www-subatech.in2p3.fr/~photons/subatech
// martinez@subatech.in2p3.fr
+// Additional particle species simulation options has been added:
+// Charged Pion, Charged Kaons, KLong Proton, Anti-Proton, Neutron,
+// Anti-Neutron --> Changes made by Gustavo Conesa in November 2004
+// Add flat Omega(782) distribution in Nov. 2010 by Renzhuo WAN
//======================================================================
#include "TMath.h"
// Rapidity distribution YPion
// Particle distribution IdPion 111, 211 and -211 (pi0, pi+ and pi-)
//
- Double_t AliGenPHOSlib::PtPion(Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtPion(const Double_t *px, const Double_t *)
{
// Pion transverse momentum distribtuion taken
// from AliGenMUONlib class, version 3.01 of aliroot
y=kb*TMath::Exp(-sqrt(x*x+kxmpi2)/kt);
return y*x;
}
- Double_t AliGenPHOSlib::YPion( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YPion( const Double_t *py, const Double_t *)
{
//
// pion y-distribution
return ka*TMath::Exp(-ex);
}
- Int_t AliGenPHOSlib::IpPion(TRandom *ran)
+Int_t AliGenPHOSlib::IpPion(TRandom */*ran*/)
{
// particle composition pi+, pi0, pi-
//
- Float_t random = ran->Rndm();
-
- if ( (3.*random) < 1. )
- {
- return 211 ;
- }
- else
- {
- if ( (3.*random) >= 2.)
- {
- return -211 ;
- }
- else
- {
return 111 ;
- }
- }
}
-// End Pions
+ Int_t AliGenPHOSlib::IpChargedPion(TRandom *ran)
+{
+// particle composition pi+, pi0, pi-
+//
+
+ Float_t random = ran->Rndm();
+
+ if ( (2.*random) < 1. )
+ {
+ return 211 ;
+ }
+ else
+ {
+ return -211 ;
+ }
+}
+
+//End Pions
+//======================================================================
+// Pi 0 Flat Distribution
+// Transverse momentum distribution PtPi0Flat
+// Rapidity distribution YPi0Flat
+// Particle distribution IdPi0Flat 111 (pi0)
+//
+
+Double_t AliGenPHOSlib::PtPi0(const Double_t * px, const Double_t *)
+{
+// Pion transverse momentum
+ const Double_t kp0 =1.35;
+ const Double_t kxn= 6.18;
+ return TMath::Power(kp0 /(kp0 + px[0]), kxn);
+}
+
+Double_t AliGenPHOSlib::PtPi0Flat(const Double_t */*px*/, const Double_t *)
+{
+// Pion transverse momentum flat distribution
+
+return 1;
+
+}
+
+Double_t AliGenPHOSlib::YPi0Flat( const Double_t */*py*/, const Double_t *)
+{
+
+// pion y-distribution
+//
+ return 1.;
+}
+
+ Int_t AliGenPHOSlib::IpPi0Flat(TRandom *)
+{
+
+// particle composition pi0
+//
+ return 111 ;
+}
+// End Pi0Flat
//=============================================================
//
Double_t AliGenPHOSlib::PtScal(Double_t pt, Int_t np)
// 7=>BARYONS-BARYONBARS
// SCALING EN MASSE PAR RAPPORT A PTPI
- // MASS 1=>PI, 2=>K, 3=>ETA, 4=>OMEGA, 5=>ETA',6=>PHI
+ // MASS 0=>PI, 1=>K, 2=>ETA, 3=>OMEGA, 4=>ETA',5=>PHI
const Double_t khm[10] = {0.1396, 0.494, 0.547, 0.782, 0.957, 1.02,
- // MASS 7=>BARYON-BARYONBAR
+ // MASS 6=>BARYON-BARYONBAR
0.938, 0. , 0., 0.};
// VALUE MESON/PI AT 5 GEV
const Double_t kfmax[10]={1., 1., 1., 1., 1., 1., 1., 1., 1., 1.};
- np--;
Double_t f5=TMath::Power(((sqrt(100.018215)+2.)/(sqrt(100.+khm[np]*khm[np])+2.0)),12.3);
Double_t kfmax2=f5/kfmax[np];
// PIONS
Double_t fmtscal=TMath::Power(((sqrt(pt*pt+0.018215)+2.)/
(sqrt(pt*pt+khm[np]*khm[np])+2.0)),12.3)/ kfmax2;
return fmtscal*ptpion;
+
}
// End Scaling
//============================================================================
// K A O N S
- Double_t AliGenPHOSlib::PtKaon( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtKaon( const Double_t *px, const Double_t *)
{
// kaon
// pt-distribution
//____________________________________________________________
- return PtScal(*px,2); // 2==> Kaon in the PtScal function
+ return PtScal(*px,1); // 1==> Kaon in the PtScal function
}
- Double_t AliGenPHOSlib::YKaon( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YKaon( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
}
}
}
+
+ Int_t AliGenPHOSlib::IpChargedKaon(TRandom *ran)
+{
+// particle composition
+//
+
+ Float_t random = ran->Rndm();
+
+ if (random < 0.5) {
+ return 321; // K+
+ } else {
+ return -321; // K-
+ }
+
+
+}
+Int_t AliGenPHOSlib::IpKaon0L(TRandom *)
+{
+ // particle composition
+ //
+
+ return 130; // K^0 long
+}
// End Kaons
//============================================================================
//============================================================================
// E T A S
- Double_t AliGenPHOSlib::PtEta( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtEta( const Double_t *px, const Double_t *)
{
// etas
// pt-distribution
//____________________________________________________________
- return PtScal(*px,3); // 3==> Eta in the PtScal function
+ return PtScal(*px,2); // 2==> Eta in the PtScal function
}
- Double_t AliGenPHOSlib::YEta( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YEta( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
return 221; // eta
}
// End Etas
+
+//======================================================================
+// Eta Flat Distribution
+// Transverse momentum distribution PtEtaFlat
+// Rapidity distribution YEtaFlat
+// Particle distribution IdEtaFlat 111 (pi0)
+//
+
+Double_t AliGenPHOSlib::PtEtaFlat(const Double_t */*px*/, const Double_t *)
+{
+// Eta transverse momentum flat distribution
+
+ return 1;
+
+}
+
+Double_t AliGenPHOSlib::YEtaFlat( const Double_t */*py*/, const Double_t *)
+{
+//
+// pion y-distribution
+//
+ return 1.;
+}
+
+ Int_t AliGenPHOSlib::IpEtaFlat(TRandom *)
+{
+//
+// particle composition eta
+//
+ return 221 ;
+}
+// End EtaFlat
//============================================================================
//============================================================================
// O M E G A S
- Double_t AliGenPHOSlib::PtOmega( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtOmega( const Double_t *px, const Double_t *)
{
// omegas
// pt-distribution
//____________________________________________________________
- return PtScal(*px,4); // 4==> Omega in the PtScal function
+ return PtScal(*px,3); // 3==> Omega in the PtScal function
}
- Double_t AliGenPHOSlib::YOmega( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YOmega( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
}
// End Omega
//============================================================================
+//======================================================================
+// Omega(782) Flat Distribution
+// Transverse momentum distribution PtOmegaFlat
+// Rapidity distribution YOmegaFlat
+// Particle distribution IdOmegaFlat 223(0mega)
+//
+
+Double_t AliGenPHOSlib::PtOmegaFlat(const Double_t */*px*/, const Double_t *)
+{
+// omega transverse momentum flat distribution
+
+return 1;
+
+}
+
+Double_t AliGenPHOSlib::YOmegaFlat( const Double_t */*py*/, const Double_t *)
+{
+
+// omega y-distribution
+//
+ return 1.;
+}
+
+ Int_t AliGenPHOSlib::IpOmegaFlat(TRandom *)
+{
+
+// particle composition omega
+//
+ return 223 ;
+}
+// End OmegaFlat
+
+
//============================================================================
// E T A P R I M E
- Double_t AliGenPHOSlib::PtEtaprime( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtEtaprime( const Double_t *px, const Double_t *)
{
// etaprime
// pt-distribution
//____________________________________________________________
- return PtScal(*px,5); // 5==> Etaprime in the PtScal function
+ return PtScal(*px,4); // 4==> Etaprime in the PtScal function
}
- Double_t AliGenPHOSlib::YEtaprime( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YEtaprime( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
//===================================================================
//============================================================================
// P H I S
- Double_t AliGenPHOSlib::PtPhi( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtPhi( const Double_t *px, const Double_t *)
{
// phi
// pt-distribution
//____________________________________________________________
- return PtScal(*px,6); // 6==> Phi in the PtScal function
+ return PtScal(*px,5); // 5==> Phi in the PtScal function
}
- Double_t AliGenPHOSlib::YPhi( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YPhi( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
//===================================================================
//============================================================================
// B A R Y O N S == protons, protonsbar, neutrons, and neutronsbars
- Double_t AliGenPHOSlib::PtBaryon( Double_t *px, Double_t *)
+ Double_t AliGenPHOSlib::PtBaryon( const Double_t *px, const Double_t *)
{
// baryons
// pt-distribution
//____________________________________________________________
- return PtScal(*px,7); // 7==> Baryon in the PtScal function
+ return PtScal(*px,6); // 6==> Baryon in the PtScal function
}
- Double_t AliGenPHOSlib::YBaryon( Double_t *py, Double_t *)
+ Double_t AliGenPHOSlib::YBaryon( const Double_t *py, const Double_t *)
{
// y-distribution
//____________________________________________________________
return -2112; // n bar
}
}
+}
+
+ Int_t AliGenPHOSlib::IpProton(TRandom *)
+{
+// particle composition
+//
+ return 2212; // p
+
+}
+ Int_t AliGenPHOSlib::IpAProton(TRandom *)
+{
+// particle composition
+//
+ return -2212; // p bar
+
+}
+
+ Int_t AliGenPHOSlib::IpNeutron(TRandom *)
+{
+// particle composition
+//
+ return 2112; // n
+
+}
+ Int_t AliGenPHOSlib::IpANeutron(TRandom *)
+{
+// particle composition
+//
+ return -2112; // n
+
}
// End Baryons
//===================================================================
-
-typedef Double_t (*GenFunc) (Double_t*, Double_t*);
- GenFunc AliGenPHOSlib::GetPt(Int_t param, const char* tname) const
+typedef Double_t (*GenFunc) (const Double_t*, const Double_t*);
+GenFunc AliGenPHOSlib::GetPt(Int_t param, const char* /*tname*/) const
{
// Return pinter to pT parameterisation
GenFunc func;
switch (param)
- {
- case kPion:
+ {
+ case kPion:
func=PtPion;
break;
- case kKaon:
+ case kPi0:
+ func=PtPi0;
+ break;
+ case kPi0Flat:
+ func=PtPi0Flat;
+ break;
+ case kKaon:
func=PtKaon;
break;
- case kEta:
+ case kEta:
func=PtEta;
break;
- case kOmega:
+ case kEtaFlat:
+ func=PtEtaFlat;
+ break;
+ case kOmega:
func=PtOmega;
break;
- case kEtaPrime:
+ case kOmegaFlat:
+ func=PtOmegaFlat;
+ break;
+ case kEtaPrime:
func=PtEtaprime;
break;
- case kBaryon:
+ case kBaryon:
func=PtBaryon;
break;
- default:
+ default:
func=0;
printf("<AliGenPHOSlib::GetPt> unknown parametrisationn");
- }
+ }
return func;
}
- GenFunc AliGenPHOSlib::GetY(Int_t param, const char* tname) const
+GenFunc AliGenPHOSlib::GetY(Int_t param, const char* /*tname*/) const
{
-// Return pointer to Y parameterisation
- GenFunc func;
- switch (param)
+ // Return pointer to Y parameterisation
+ GenFunc func;
+ switch (param)
{
case kPion:
- func=YPion;
- break;
+ func=YPion;
+ break;
+ case kPi0:
+ case kPi0Flat:
+ func=YPi0Flat;
+ break;
case kKaon:
- func=YKaon;
- break;
+ func=YKaon;
+ break;
case kEta:
- func=YEta;
- break;
+ func=YEta;
+ break;
+ case kEtaFlat:
+ func=YEtaFlat;
+ break;
case kOmega:
- func=YOmega;
- break;
+ func=YOmega;
+ break;
+ case kOmegaFlat:
+ func=YOmegaFlat;
+ break;
case kEtaPrime:
- func=YEtaprime;
- break;
+ func=YEtaprime;
+ break;
case kPhi:
- func=YPhi;
- break;
+ func=YPhi;
+ break;
case kBaryon:
- func=YBaryon;
- break;
+ func=YBaryon;
+ break;
default:
- func=0;
-
printf("<AliGenPHOSlib::GetY> unknown parametrisationn");
+ func=0;
+ printf("<AliGenPHOSlib::GetY> unknown parametrisationn");
}
- return func;
+ return func;
}
typedef Int_t (*GenFuncIp) (TRandom *);
- GenFuncIp AliGenPHOSlib::GetIp(Int_t param, const char* tname) const
+GenFuncIp AliGenPHOSlib::GetIp(Int_t param, const char* /*tname*/) const
{
-// Return pointer to particle composition
- GenFuncIp func;
- switch (param)
+ // Return pointer to particle composition
+ GenFuncIp func;
+ switch (param)
{
- case kPion:
-
- func=IpPion;
- break;
+ case kPion:
+ func=IpPion;
+ break;
+ case kChargedPion:
+ func=IpChargedPion;
+ break;
+ case kPi0:
+ case kPi0Flat:
+ func=IpPi0Flat;
+ break;
case kKaon:
- func=IpKaon;
- break;
+ func=IpKaon;
+ break;
+ case kChargedKaon:
+ func=IpChargedKaon;
+ break;
+ case kKaon0L:
+ func=IpKaon0L;
+ break;
case kEta:
- func=IpEta;
- break;
+ func=IpEta;
+ break;
+ case kEtaFlat:
+ func=IpEtaFlat;
+ break;
+
case kOmega:
- func=IpOmega;
- break;
+ func=IpOmega;
+ break;
+ case kOmegaFlat:
+ func=IpOmegaFlat;
+ break;
case kEtaPrime:
- func=IpEtaprime;
- break;
+ func=IpEtaprime;
+ break;
case kPhi:
- func=IpPhi;
- break;
+ func=IpPhi;
+ break;
case kBaryon:
- func=IpBaryon;
- break;
+ func=IpBaryon;
+ break;
+ case kProton:
+ func=IpProton;
+ break;
+ case kAProton:
+ func=IpAProton;
+ break;
+ case kNeutron:
+ func=IpNeutron;
+ break;
+ case kANeutron:
+ func=IpANeutron;
+ break;
+
default:
- func=0;
-
printf("<AliGenPHOSlib::GetIp> unknown parametrisationn");
+ func=0;
+ printf("<AliGenPHOSlib::GetIp> unknown parametrisationn");
}
- return func;
+ return func;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff