EVGEN/AliGenEMlib.h

   1 #ifndef ALIGENEMLIB_H
   2 #define ALIGENEMLIB_H
   3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 /* $Id: AliGenEMlib.h 30052 2008-11-25 14:54:18Z morsch $ */
   7
   8 /////////////////////////////////////////////////////////////////////////////
   9 //                                                                         //
  10 // Implementation of AliGenEMlib for electron, di-electron, and photon     //
  11 // cocktail calculations.                                                  //
  12 // It is based on AliGenGSIlib.                                            //
  13 //                                                                         //
  14 // Responsible: R.Averbeck@gsi.de                                          //
  15 //                                                                         //
  16 /////////////////////////////////////////////////////////////////////////////
  17
  18 #include "AliGenLib.h"
  19 class TRandom;
  20
  21 class AliGenEMlib :public AliGenLib {
  22 public:
  23
  24   enum Particle_t{kPizero=0, kEta, kRho, kOmega, kEtaprime, kPhi, kJpsi, kDirectRealGamma, kDirectVirtGamma };
  25   enum Centrality_t{kpp=0x0, k0005=0x1, k0510=0x2, k1020=0x3, k2030=0x4, k3040=0x5, k4050=0x6, k5060=0x7, k0010=0x8, k2040=0x9, k4060=0xA, k6080=0xB, k0020=0xC, k0040=0xD, k2080=0xE, k4080=0xF, kCentralities=0x10};
  26   enum PtParamSet_t{kPizero7TeVpp=0x00, kPizeroEta7TeVpp=0x10, kPizero7TeVpplow=0x20, kPizeroEta7TeVpplow=0x30, kPizero7TeVpphigh=0x40, kPizeroEta7TeVpphigh=0x50, kPizero2760GeVpp=0x60, kPizeroEta2760GeVpp=0x70, kPizero2760GeVpplow=0x80, kPizeroEta2760GeVpplow=0x90, kPizero2760GeVpphigh=0xA0, kPizeroEta2760GeVpphigh=0xB0, kPiOldChargedPbPb=0xC0, kPichargedPbPb=0xD0, kPizeroPbPb=0xE0, kPichargedPPb=0xF0 };
  27   enum v2Sys_t{kLoV2Sys=-1, kNoV2Sys=0, kUpV2Sys=+1};
  28
  29   AliGenEMlib() { } ;
  30
  31   static void SelectParams(PtParamSet_t ptSelect, Centrality_t centSelect=kpp, Int_t v2sys=kNoV2Sys)
  32   { fgSelectedPtParam=ptSelect; fgSelectedCentrality=centSelect; fgSelectedV2Systematic=v2sys; }
  33
  34     GenFunc   GetPt(Int_t param, const char * tname=0) const;
  35     GenFunc   GetY(Int_t param, const char * tname=0) const;
  36     GenFuncIp GetIp(Int_t param, const char * tname=0) const;
  37   GenFunc   GetV2(Int_t param, const char * tname=0) const;
  38
  39   //private:
  40
  41   // General functions
  42
  43   static Int_t fgSelectedPtParam; // selected pT parameter
  44   static Int_t fgSelectedCentrality; // selected Centrality
  45   static Int_t fgSelectedV2Systematic; // selected v2 systematics, usefully values: -1,0,1
  46
  47
  48   static Double_t PtModifiedHagedornThermal(Double_t pt,
  49                                             Double_t c,
  50                                             Double_t p0,
  51                                             Double_t p1,
  52                                             Double_t n,
  53                                             Double_t cT,
  54                                             Double_t T);
  55
  56
  57
  58   static Double_t PtModifiedHagedornExp(Double_t pt,
  59                                         Double_t c,
  60                                         Double_t p0,
  61                                         Double_t p1,
  62                                         Double_t p2,
  63                                         Double_t n);
  64
  65
  66   static Double_t PtModifiedHagedornExp2(Double_t pt,
  67                                            Double_t c,
  68                                            Double_t a,
  69                                            Double_t b,
  70                                            Double_t p0,
  71                                            Double_t p1,
  72                                            Double_t d,
  73                                            Double_t n);
  74
  75
  76   static Double_t PtTsallis(Double_t pt,
  77                             Double_t m,
  78                             Double_t c,
  79                             Double_t T,
  80                             Double_t n);
  81
  82   static Double_t PtExponential(const Double_t *pt, const Double_t *param);
  83   static Double_t PtModifiedHagedornPowerlaw(const Double_t *pt, const Double_t *param);
  84   static Double_t PtDoublePowerlaw(const Double_t *pt, const Double_t *param);
  85   static Double_t IntegratedKrollWada(const Double_t *mh, const Double_t *);
  86
  87   // direct gamma
  88   static Double_t PtPromptRealGamma(const Double_t *px, const Double_t *dummy);
  89   static Double_t PtPromptVirtGamma(const Double_t *px, const Double_t *dummy);
  90   static Double_t PtThermalRealGamma(const Double_t *px, const Double_t *dummy);
  91   static Double_t PtThermalVirtGamma(const Double_t *px, const Double_t *dummy);
  92
  93   static Int_t    IpDirectRealGamma(TRandom *ran);
  94   static Double_t PtDirectRealGamma(const Double_t *px, const Double_t *dummy);
  95   static Double_t YDirectRealGamma(const Double_t *py, const Double_t *dummy);
  96   static Double_t V2DirectRealGamma(const Double_t *px, const Double_t *dummy);
  97
  98   static Int_t    IpDirectVirtGamma(TRandom *ran);
  99   static Double_t PtDirectVirtGamma(const Double_t *px, const Double_t *dummy);
 100   static Double_t YDirectVirtGamma(const Double_t *py, const Double_t *dummy);
 101   static Double_t V2DirectVirtGamma(const Double_t *px, const Double_t *dummy);
 102
 103   // Pizero
 104     static Int_t    IpPizero(TRandom *ran);
 105   static Double_t PtPizero(const Double_t *px, const Double_t *dummy);
 106     static Double_t YPizero(const Double_t *py, const Double_t *dummy);
 107   static Double_t V2Pizero(const Double_t *px, const Double_t *dummy);
 108
 109   // Eta
 110     static Int_t    IpEta(TRandom *ran);
 111   static Double_t PtEta(const Double_t *px, const Double_t *dummy);
 112     static Double_t YEta(const Double_t *py, const Double_t *dummy);
 113   static Double_t V2Eta(const Double_t *px, const Double_t *dummy);
 114
 115   // Rho
 116     static Int_t    IpRho(TRandom *ran);
 117   static Double_t PtRho(const Double_t *px, const Double_t *dummy);
 118     static Double_t YRho(const Double_t *py, const Double_t *dummy);
 119   static Double_t V2Rho(const Double_t *py, const Double_t *dummy);
 120
 121   // Omega
 122     static Int_t    IpOmega(TRandom *ran);
 123   static Double_t PtOmega(const Double_t *px, const Double_t *dummy);
 124     static Double_t YOmega(const Double_t *py, const Double_t *dummy);
 125   static Double_t V2Omega(const Double_t *py, const Double_t *dummy);
 126
 127   // Etaprime
 128     static Int_t    IpEtaprime(TRandom *ran);
 129   static Double_t PtEtaprime(const Double_t *px, const Double_t *dummy);
 130     static Double_t YEtaprime(const Double_t *py, const Double_t *dummy);
 131   static Double_t V2Etaprime(const Double_t *py, const Double_t *dummy);
 132
 133   // Phi
 134     static Int_t    IpPhi(TRandom *ran);
 135   static Double_t PtPhi(const Double_t *px, const Double_t *dummy);
 136     static Double_t YPhi(const Double_t *py, const Double_t *dummy);
 137   static Double_t V2Phi(const Double_t *py, const Double_t *dummy);
 138
 139   // Jpsi
 140   static Int_t    IpJpsi(TRandom *ran);
 141   static Double_t PtJpsi(const Double_t *px, const Double_t *dummy);
 142   static Double_t YJpsi(const Double_t *py, const Double_t *dummy);
 143   static Double_t V2Jpsi(const Double_t *py, const Double_t *dummy);
 144
 145   // General
 146   //static Double_t PtFlat(const Double_t *px, const Double_t *dummy);
 147     static Double_t YFlat(Double_t y);
 148   static Double_t MtScal(Double_t pt, Int_t np);
 149   static Double_t V2Param(const Double_t *px, const Double_t *param);
 150   static Double_t V2Flat(const Double_t *px, const Double_t *param);
 151   static Double_t KEtScal(Double_t pt, Int_t np);
 152   static Double_t GetTAA(Int_t cent);
 153
 154   static Double_t CrossOverLc(double a, double b, double x);
 155   static Double_t CrossOverRc(double a, double b, double x);
 156
 157   static const Double_t fgkPtParam[kCentralities][10];          // parameters of pi pt spectrum
 158   static const Double_t fgkV2param[kCentralities][16];          // parameters of pi v2 spectrum
 159   static const Double_t fgkRawPtOfV2Param[kCentralities][10];   // parameters of the raw pt spectrum of v2 analysis
 160   static const Double_t fgkThermPtParam[kCentralities][2];      // parameters of thermal gamma pt
 161   static const Double_t fgkHM[8];                    // particle masses
 162   static const Double_t fgkMtFactor[2][8];           // mt scaling factor
 163
 164   ClassDef(AliGenEMlib,0)
 165 };
 166
 167
 168 #endif