/////////////////////////////////////////////////////////////////////////////
+#include <Riostream.h>
#include "TMath.h"
#include "TRandom.h"
#include "TString.h"
ClassImp(AliGenEMlib)
+//Initializers for static members
+Int_t AliGenEMlib::fgSelectedPtParam=AliGenEMlib::kPizero7TeVpp;
+Int_t AliGenEMlib::fgSelectedCentrality=AliGenEMlib::kpp;
+Int_t AliGenEMlib::fgSelectedV2Systematic=AliGenEMlib::kNoV2Sys;
+
+Double_t AliGenEMlib::CrossOverLc(double a, double b, double x){
+ if(x<b-a/2) return 1.0;
+ else if(x>b+a/2) return 0.0;
+ else return cos(((x-b)/a+0.5)*TMath::Pi())/2+0.5;
+}
+Double_t AliGenEMlib::CrossOverRc(double a, double b, double x){
+ return 1-CrossOverLc(a,b,x);
+}
+
+const Double_t AliGenEMlib::fgkV2param[kCentralities][16] = {
+ // charged pion cent, based on: https://twiki.cern.ch/twiki/bin/viewauth/ALICE/FlowPAGQM2012talkIdentified
+ { 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // pp no V2
+ ,{ 6.554571e-02, 1.436915e+00, 4.610598e-02, 2.554090e+00, 1.300948e+00, 2.970850e-02, 4.767877e+00, 4.228885e+00, 6.025959e-02, 1.570851e-03, 1.108941e+00, 0, 1, 1.715434e-03, 4.088070e-01, 25 } // 0-5
+ ,{ 1.171348e-01, 1.333067e+00, 4.537086e-02, 3.046348e+00, 3.903416e+00, 4.407152e-02, 9.123846e-01, 4.834531e+00, 1.186227e-01, 2.259463e-03, 8.916458e-01, 0, 1, 2.300647e-03, 4.531172e-01, 25 } // 5-10
+ ,{ 1.748434e-01, 1.285199e+00, 4.219881e-02, 4.018858e+00, 4.255082e+00, 7.955896e-03, 1.183264e-01,-9.329627e+00, 5.826570e-01, 3.368057e-03, 5.437668e-01, 0, 1, 3.178663e-03, 3.617552e-01, 25 } // 10-20
+ ,{ 2.149526e-01, 1.408792e+00, 5.062101e-02, 3.206279e+00, 3.988517e+00, 3.724655e-02, 1.995791e-01,-1.571536e+01, 6.494227e+00, 4.957874e-03, 4.903140e-01, 0, 1, 4.214626e-03, 3.457922e-01, 25 } // 20-30
+ ,{ 2.408942e-01, 1.477541e+00, 5.768983e-02, 3.333347e+00, 3.648508e+00,-2.044309e-02, 1.004145e-01,-2.386625e+01, 3.301913e+00, 5.666750e-03, 5.118686e-01, 0, 1, 4.626802e-03, 3.188974e-01, 25 } // 30-40
+ ,{ 2.495109e-01, 1.543680e+00, 6.217835e-02, 3.518863e+00, 4.557145e+00, 6.014553e-02, 1.491814e-01,-5.443647e+00, 5.403300e-01, 6.217285e-03, 5.580218e-01, 0, 1, 4.620486e-03, 3.792879e-01, 25 } // 40-50
+ ,{ 2.166399e-01, 1.931033e+00, 8.195390e-02, 2.226640e+00, 3.106649e+00, 1.058755e-01, 8.557791e-01, 4.006501e+00, 2.476449e-01, 6.720714e-03, 6.342966e-01, 0, 1, 4.449839e-03, 4.968750e-01, 25 } // 50-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 0-10
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 20-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 40-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 60-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 0-20
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 0-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 20-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 2.0000000000, 0.0000000000, 1.0000000000, 0, 1, 0.0000000000, 1.0000000000, 10 } // 40-80
+};
+
+const Double_t AliGenEMlib::fgkRawPtOfV2Param[kCentralities][10] = {
+ { 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // pp no V2
+ ,{ 2.181446e+08, 9.412925e-01, 1.158774e-01, 3.020303e+01, 6.790828e+00, 9.999996e+01, 2.616827e+00, 3.980492e+00, 1.225169e+07, 5.575243e+00 } // 0-5
+ ,{ 3.006215e+08, 9.511881e-01, 1.192788e-01, 2.981931e+01, 5.068175e+01, 9.999993e+01, 2.650635e+00, 4.073982e+00, 2.508045e+07, 5.621039e+00 } // 5-10
+ ,{ 1.643438e+09, 9.604242e-01, 1.218512e-01, 2.912684e+01, 1.164242e+00, 9.999709e+01, 2.662326e+00, 4.027795e+00, 7.020810e+07, 5.696860e+00 } // 10-20
+ ,{ 8.109985e+08, 9.421935e-01, 1.328020e-01, 2.655910e+01, 1.053677e+00, 9.999812e+01, 2.722949e+00, 3.964547e+00, 6.104096e+07, 5.694703e+00 } // 20-30
+ ,{ 5.219789e+08, 9.417339e-01, 1.417541e-01, 2.518080e+01, 7.430803e-02, 9.303295e+01, 2.780227e+00, 3.909570e+00, 4.723116e+07, 5.778375e+00 } // 30-40
+ ,{ 2.547159e+08, 9.481459e-01, 2.364858e-01, 1.689288e+01, 3.858883e+00, 6.352619e+00, 2.742270e+00, 3.855226e+00, 3.120535e+07, 5.878677e+00 } // 40-50
+ ,{ 9.396097e+07, 9.304491e-01, 3.244940e-01, 1.291696e+01, 2.854367e+00, 6.325908e+00, 2.828258e+00, 4.133699e+00, 1.302739e+07, 5.977896e+00 } // 50-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-10
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 60-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-20
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-80
+};
+
+const Double_t AliGenEMlib::fgkPtParam[kCentralities][10] = {
+ { 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // pp no V2
+ ,{ 7.641493e+01, 7.203468e-01, 3.651383e-01, 1.047542e+01, 3.494331e+00, 5.129019e+00, 3.081716e+00, 5.154525e+00, 3.065719e+01, 5.823718e+00 } // 0-5
+ ,{ 1.704676e+02, 7.852682e-01, 4.177172e-01, 1.014652e+01, 3.324409e+00, 4.825894e+00, 2.889738e+00, 4.772249e+00, 3.502627e+01, 5.938773e+00 } // 5-10
+ ,{ 1.823377e+02, 8.144309e-01, 4.291562e-01, 1.022767e+01, 3.585469e+00, 5.275078e+00, 3.144351e+00, 5.259097e+00, 2.675708e+01, 5.892506e+00 } // 10-20
+ ,{ 4.851407e+02, 9.341151e-01, 4.716673e-01, 1.058090e+01, 4.681218e+00, 7.261284e+00, 3.883227e+00, 6.638627e+00, 1.562806e+01, 5.772127e+00 } // 20-30
+ ,{ 3.157060e+01, 6.849451e-01, 4.868669e-01, 8.394558e+00, 3.539142e+00, 5.495280e+00, 4.102638e+00, 3.722991e+00, 1.638622e+01, 5.935963e+00 } // 30-40
+ ,{ 1.857919e+01, 6.185989e-01, 5.878869e-01, 7.035064e+00, 2.892415e+00, 4.339383e+00, 3.549679e+00, 2.821061e+00, 1.529318e+01, 6.091388e+00 } // 40-50
+ ,{ 1.069397e+01, 5.816587e-01, 6.542961e-01, 6.472858e+00, 2.643870e+00, 3.929020e+00, 3.339224e+00, 2.410371e+00, 9.606748e+00, 6.116685e+00 } // 50-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-10
+ ,{ 1.271594e+02, 7.790165e-01, 5.793214e-01, 8.050008e+00, 3.211312e+00, 4.825258e+00, 3.840509e+00, 3.046231e+00, 2.172177e+01, 5.983496e+00 } // 20-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-60
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 60-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-20
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-40
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-80
+ ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-80
+};
+
+const Double_t AliGenEMlib::fgkThermPtParam[kCentralities][2] = {
+ { 0.0000000000, 0.0000000000 } // pp no V2
+ ,{ 0.0000000000, 0.0000000000 } // 0-5
+ ,{ 0.0000000000, 0.0000000000 } // 5-10
+ ,{ 3.335661e+01, 3.400585e+00 } // 10-20 //based on: https://aliceinfo.cern.ch/Notes/node/249
+ ,{ 0.0000000000, 0.0000000000 } // 20-30
+ ,{ 0.0000000000, 0.0000000000 } // 30-40
+ ,{ 0.0000000000, 0.0000000000 } // 40-50
+ ,{ 0.0000000000, 0.0000000000 } // 50-60
+ ,{ 3.648327e+02, 4.477749e+00 } // 0-10 //based on: https://aliceinfo.cern.ch/Notes/node/249
+ ,{ 1.696223e+00, 2.429660e+00 } // 20-40 //based on: https://twiki.cern.ch/twiki/pub/ALICE/ALICEDirectPhotonSpectrumPaper/directPbPb.pdf
+ ,{ 0.0000000000, 0.0000000000 } // 40-60
+ ,{ 0.0000000000, 0.0000000000 } // 60-80
+ ,{ 1.492160e+01, 2.805213e+00 } // 0-20 //based on: https://twiki.cern.ch/twiki/pub/ALICE/ALICEDirectPhotonSpectrumPaper/directPbPb.pdf
+ ,{ 4.215110e+01, 3.242719e+00 } // 0-40 //based on: https://aliceinfo.cern.ch/Figure/node/2866
+ ,{ 0.0000000000, 0.0000000000 } // 20-80
+ ,{ 0.0000000000, 0.0000000000 } // 40-80
+};
+
+// MASS 0=>PIZERO, 1=>ETA, 2=>RHO, 3=>OMEGA, 4=>ETAPRIME, 5=>PHI, 6=>JPSI
+const Double_t AliGenEMlib::fgkHM[8] = {0.13498, 0.54751, 0.7755, 0.78265, 0.95778, 1.01946, 3.0969, 0.0};
+
+const Double_t AliGenEMlib::fgkMtFactor[2][8] = {
+ // {1.0, 0.5, 1.0, 0.9, 0.4, 0.23, 0.054}, // factor for pp from arXiv:1110.3929
+ // {1.0, 0.55, 1.0, 0.9, 0.4, 0.25, 0.004} // factor for PbPb from arXiv:1110.3929
+ //{1., 0.48, 1.0, 0.9, 0.25, 0.4}, (old values)
+ //{1., 0.48, 1.0, 0.9, 0.4, 0.25}, (nlo values)
+ //{1., 0.48, 1.0, 0.8, 0.4, 0.2, 0.06} (combination of nlo and LHC measurements)
+ //https://aliceinfo.cern.ch/Figure/node/2634
+ //https://aliceinfo.cern.ch/Figure/node/2788
+ //https://aliceinfo.cern.ch/Figure/node/4403
+ //https://aliceinfo.cern.ch/Notes/node/87
+ //best guess:
+ {1., 0.48, 1.0, 0.9, 0.4, 0.25, 0., 0.}, //pp
+ {1., 0.48, 1.0, 0.9, 0.4, 0.25, 0., 0.} //PbPb
+};
+
//==========================================================================
//
// Definition of Particle Distributions
//
//==========================================================================
+//--------------------------------------------------------------------------
+//
+// General functions
+//
+//--------------------------------------------------------------------------
+Double_t AliGenEMlib::PtModifiedHagedornThermal(Double_t pt,
+ Double_t c,
+ Double_t p0,
+ Double_t p1,
+ Double_t n,
+ Double_t cT,
+ Double_t T)
+{
+ // Modified Hagedorn Thermal fit to Picharged for PbPb:
+ Double_t invYield;
+ invYield = c/TMath::Power(p0+pt/p1,n) + cT*exp(-1.0*pt/T);
+
+ return invYield*(2*TMath::Pi()*pt);
+}
+
+
+
+Double_t AliGenEMlib::PtModifiedHagedornExp(Double_t pt,
+ Double_t c,
+ Double_t p1,
+ Double_t p2,
+ Double_t p0,
+ Double_t n)
+{
+ // Modified Hagedorn exponentiel fit to Pizero for PbPb:
+ Double_t invYield;
+ invYield = c*TMath::Power(exp(-1*(p1*pt-p2*pt*pt))+pt/p0,-n);
+
+ return invYield*(2*TMath::Pi()*pt);
+}
+
+
+Double_t AliGenEMlib::PtModifiedHagedornExp2(Double_t pt,
+ Double_t c,
+ Double_t a,
+ Double_t b,
+ Double_t p0,
+ Double_t p1,
+ Double_t d,
+ Double_t n)
+{
+ // Modified Hagedorn exponential fit to charged pions for pPb:
+ Double_t invYield;
+ invYield = c*TMath::Power(exp(-a*pt-b*pt*pt)+pt/p0+TMath::Power(pt/p1,d),-n);
+
+ return invYield*(2*TMath::Pi()*pt);
+}
+
+Double_t AliGenEMlib::PtTsallis(Double_t pt,
+ Double_t m,
+ Double_t c,
+ Double_t T,
+ Double_t n)
+{
+ // Tsallis fit to Pizero for pp:
+ Double_t mt;
+ Double_t invYield;
+
+ mt = sqrt(m*m + pt*pt);
+ invYield = c*((n-1.)*(n-2.))/(n*T*(n*T+m*(n-2.)))*pow(1.+(mt-m)/(n*T),-n);
+
+ return invYield*(2*TMath::Pi()*pt);
+}
+
+// Exponential
+Double_t AliGenEMlib::PtExponential(const Double_t *px, const Double_t *c){
+ const double &pt=px[0];
+ Double_t invYield = c[0]*exp(-pt*c[1]);
+
+ return invYield*(2*TMath::Pi()*pt);
+}
+
+// Hagedorn with additional Powerlaw
+Double_t AliGenEMlib::PtModifiedHagedornPowerlaw(const Double_t *px, const Double_t *c){
+ const double &pt=px[0];
+ Double_t invYield = c[0]*pow(c[1]+pt*c[2],-c[3])*CrossOverLc(c[5],c[4],pt)+CrossOverRc(c[7],c[6],pt)*c[8]*pow(pt+0.001,-c[9]); //pt+0.001: prevent powerlaw from exploding for pt->0
+
+ return invYield*(2*TMath::Pi()*pt+0.001); //pt+0.001: be sure to be > 0
+}
+
+// double powerlaw for J/Psi yield
+Double_t AliGenEMlib::PtDoublePowerlaw(const Double_t *px, const Double_t *c){
+ const double &pt=px[0];
+ Double_t yield = c[0]*pt*pow(1+pow(pt*c[1],2),-c[2]);
+
+ return yield;
+}
+
+// integral over krollwada with S=1^2*(1-mee^2/mh^2)^3 from mee=0 up to mee=mh
+// approximation is perfect for mh>20MeV
+Double_t AliGenEMlib::IntegratedKrollWada(const Double_t *mh, const Double_t *){
+ if(*mh<0.002941) return 0;
+ return 2*log(*mh/0.000511/exp(1.75))/411.11/TMath::Pi();
+}
+
+//--------------------------------------------------------------------------
+//
+// DirectRealGamma
+//
+//--------------------------------------------------------------------------
+Double_t AliGenEMlib::PtPromptRealGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ const static Double_t promptGammaPtParam[10] = { 8.715017e-02, 4.439243e-01, 1.011650e+00, 5.193789e+00, 2.194442e+01, 1.062124e+01, 2.469876e+01, 6.052479e-02, 5.611410e-02, 5.169743e+00 };
+
+ return PtModifiedHagedornPowerlaw(px,promptGammaPtParam)*GetTAA(fgSelectedCentrality);
+}
+
+Double_t AliGenEMlib::PtThermalRealGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return PtExponential(px,fgkThermPtParam[fgSelectedCentrality]);
+}
+
+Double_t AliGenEMlib::PtDirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return PtPromptRealGamma(px,px)+PtThermalRealGamma(px,px);
+}
+
+Int_t AliGenEMlib::IpDirectRealGamma(TRandom *)
+{
+ return 22;
+}
+
+Double_t AliGenEMlib::YDirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return YFlat(*px);
+}
+
+Double_t AliGenEMlib::V2DirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ const static Double_t v2Param[3][16] = {
+ { 1.004245e-01, 1.057645e+00, 0.000000e+00, 2.836492e+00, 2.819767e+00, -6.231529e-02, 1.173054e+00, 2.836492e+00, 1.881590e-01, 1.183293e-02, 1.252249e+00, 0, 1, 4.876263e-03, 1.518526e+00, 4.5 } // 00-20, based on: https://aliceinfo.cern.ch/Notes/node/249
+ ,{ 1.619000e-01, 1.868201e+00, 6.983303e-15, 2.242170e+00, 4.484339e+00, -1.695734e-02, 2.301359e+00, 2.871469e+00, 1.619000e-01, 2.264320e-02, 1.028641e+00, 0, 1, 8.172203e-03, 1.271637e+00, 4.5 } // 20-40
+ ,{ 1.335000e-01, 1.076916e+00, 1.462605e-08, 2.785732e+00, 5.571464e+00, -2.356156e-02, 2.745437e+00, 2.785732e+00, 1.335000e-01, 1.571589e-02, 1.001131e+00, 0, 1, 5.179715e-03, 1.329344e+00, 4.5 } // 00-40
+ };
+ switch(fgSelectedCentrality){
+ case k0020: return V2Param(px,v2Param[0]); break;
+ case k2040: return V2Param(px,v2Param[1]); break;
+ case k0040: return V2Param(px,v2Param[2]); break;
+ // case k0010: return 0.43*V2Param(px,v2Param[1]); break; //V2Pizero(0010)/V2Pizero(2040)=0.43 +-0.025
+ // case k1020: return 0.75*V2Param(px,v2Param[1]); break; //V2Pizero(1020)/V2Pizero(2040)=0.75 +-0.04
+ case k0010: return 0.53*V2Param(px,v2Param[2]); break; //V2Pizero(0010)/V2Pizero(0040)=0.53 +-0.03
+ case k1020: return 0.91*V2Param(px,v2Param[2]); break; //V2Pizero(1020)/V2Pizero(0040)=0.91 +-0.04
+ }
+ return 0;
+}
+
+
+//--------------------------------------------------------------------------
+//
+// DirectVirtGamma
+//
+//--------------------------------------------------------------------------
+Double_t AliGenEMlib::PtPromptVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return IntegratedKrollWada(px,px)*PtPromptRealGamma(px,px);
+}
+
+Double_t AliGenEMlib::PtThermalVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return IntegratedKrollWada(px,px)*PtThermalRealGamma(px,px);
+}
+
+Double_t AliGenEMlib::PtDirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return IntegratedKrollWada(px,px)*PtDirectRealGamma(px,px);
+}
+
+Int_t AliGenEMlib::IpDirectVirtGamma(TRandom *)
+{
+ return 220000;
+}
+
+Double_t AliGenEMlib::YDirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return YFlat(*px);
+}
+
+Double_t AliGenEMlib::V2DirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return V2DirectRealGamma(px,px);
+}
+
//--------------------------------------------------------------------------
//
// Pizero
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpPizero(TRandom *)
{
-// Return pizero pdg code
+ // Return pizero pdg code
return 111;
}
Double_t AliGenEMlib::PtPizero( const Double_t *px, const Double_t */*dummy*/ )
{
-// Generate pizero pT distribution from modified Hagedorn parameterization
-// taken from fit to unidentified hadrons in pp at 7 TeV
- const Double_t kc=0.000565;
- const Double_t kp0=0.2472;
- const Double_t kp1=4.354;
- const Double_t kn=7.007;
- Double_t invYield;
- Double_t x=*px;
-
- invYield = kc/TMath::Power(kp0+x/kp1,kn);
+ // double pigammacorr=1; //misuse pion for direct gammas, tuned for 0040, iteration 0
+ // pigammacorr*=2.258900e-01*log(*px+0.001)+1.591291e+00; //iteration 1
+ // pigammacorr*=6.601943e-03*log(*px+0.001)+9.593698e-01; //iteration 2
+ // pigammacorr*=4.019933e-03*log(*px+0.001)+9.843412e-01; //iteration 3
+ // pigammacorr*=-4.543991e-03*log(*px+0.001)+1.010886e+00; //iteration 4
+ // return pigammacorr*PtPromptRealGamma(px,px); //now the gammas from the pi->gg decay have the pt spectrum of prompt real gammas
+
+ // fit functions and corresponding parameter of Pizero pT for pp @ 2.76 TeV and @ 7 TeV and for PbPb @ 2.76 TeV
+
+ Double_t km=0.;
+ Double_t kc=0.;
+ Double_t kn=0.;
+ Double_t kcT=0.;
+ Double_t kT=0.;
+ Double_t kp0=0.;
+ Double_t kp1=0.;
+ Double_t kp2=0.;
+ Double_t ka=0.;
+ Double_t kb=0.;
+ Double_t kd=0.;
+
+ double n1,n2,n3,n4;
+ int oldCent;
+
+ switch(fgSelectedPtParam|fgSelectedCentrality) {
+ // fit to pi charged, same data like in kPiOldChargedPbPb,
+ // but tested and compared against newest (2014) neutral pi measurement
+ case kPichargedPbPb|k0005:
+ case kPichargedPbPb|k0510:
+ case kPichargedPbPb|k1020:
+ case kPichargedPbPb|k2030:
+ case kPichargedPbPb|k3040:
+ case kPichargedPbPb|k4050:
+ case kPichargedPbPb|k5060:
+ case kPichargedPbPb|k2040:
+ return PtModifiedHagedornPowerlaw(px,fgkPtParam[fgSelectedCentrality]);
+ break;
+ case kPichargedPbPb|k0010:
+ n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
+ return (n1+n2)/2;
+ break;
+ case kPichargedPbPb|k0020:
+ n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
+ n3=PtModifiedHagedornPowerlaw(px,fgkPtParam[k1020]);
+ return (n1+n2+2*n3)/4;
+ break;
+ case kPichargedPbPb|k0040:
+ n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
+ n3=PtModifiedHagedornPowerlaw(px,fgkPtParam[k1020]);
+ n4=PtModifiedHagedornPowerlaw(px,fgkPtParam[k2040]);
+ return (n1+n2+2*n3+4*n4)/8;
+ break;
+ case kPichargedPbPb|k4060:
+ n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k4050]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k5060]);
+ return (n1+n2)/2;
+ break;
+
+
+ // fit to pi charged v1
+ // charged pion from ToF, unidentified hadrons scaled with pion from TPC
+ // for Pb-Pb @ 2.76 TeV
+ case kPiOldChargedPbPb|k0005:
+ kc=1347.5; kp0=0.9393; kp1=2.254; kn=11.294; kcT=0.002537; kT=2.414;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k0510:
+ kc=1256.1; kp0=0.9545; kp1=2.248; kn=11.291; kcT=0.002662; kT=2.326;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k2030:
+ kc=7421.6; kp0=1.2059; kp1=1.520; kn=10.220; kcT=0.002150; kT=2.196;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k3040:
+ kc=1183.2; kp0=1.0478; kp1=1.623; kn=9.8073; kcT=0.00198333; kT=2.073;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ // the following is what went into the Pb-Pb preliminary approval (0-10%)
+ case kPiOldChargedPbPb|k0010:
+ kc=1296.0; kp0=0.968; kp1=2.567; kn=12.27; kcT=0.004219; kT=2.207;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k1020:
+ kc=986.0; kp0=0.9752; kp1=2.376; kn=11.62; kcT=0.003116; kT=2.213;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k2040:
+ kc=17337.0; kp0=1.337; kp1=1.507; kn=10.629; kcT=0.00184; kT=2.234;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k4050:
+ kc=6220.0; kp0=1.322; kp1=1.224; kn=9.378; kcT=0.000595; kT=2.383;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k5060:
+ kc=2319.0; kp0=1.267; kp1=1.188; kn=9.044; kcT=0.000437; kT=2.276;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k4060:
+ kc=4724.0; kp0=1.319; kp1=1.195; kn=9.255; kcT=0.000511; kT=2.344;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k6080:
+ kc=2842.0; kp0=1.465; kp1=0.8324; kn=8.167; kcT=0.0001049; kT=2.29;
+ return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
+ break;
+ case kPiOldChargedPbPb|k0020:
+ oldCent=fgSelectedCentrality;
+ fgSelectedCentrality=k0010;
+ n1=PtPizero(px,px);
+ fgSelectedCentrality=k1020;
+ n2=PtPizero(px,px);
+ fgSelectedCentrality=oldCent;
+ return (n1+n2)/2;
+ break;
+ case kPiOldChargedPbPb|k0040:
+ oldCent=fgSelectedCentrality;
+ fgSelectedCentrality=k0010;
+ n1=PtPizero(px,px);
+ fgSelectedCentrality=k1020;
+ n2=PtPizero(px,px);
+ fgSelectedCentrality=k2040;
+ n3=PtPizero(px,px);
+ fgSelectedCentrality=oldCent;
+ return (n1+n2+2*n3)/4;
+ break;
+
+ // fit to pizero from conversion analysis
+ // for PbPb @ 2.76 TeV
+ // Pi0 spectra --> not final results
+ case kPizeroPbPb|k0005:
+ kc=1952.832; kp1=0.264; kp2=0.069; kp0=1.206; kn=9.732;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k0010:
+ kc=1810.029; kp1=0.291; kp2=0.059; kp0=1.170; kn=9.447;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k0020:
+ kc=856.241; kp1=-0.409; kp2=-0.127; kp0=1.219; kn=9.030;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k1020:
+ kc=509.781; kp1=-0.784; kp2=-0.120; kp0=0.931; kn=7.299;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k2040:
+ kc=541.049; kp1=0.542; kp2=-0.069; kp0=0.972; kn=7.866;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k2080:
+ kc=222.577; kp1=0.634; kp2=0.009; kp0=0.915; kn=7.431;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k4080:
+ kc=120.153; kp1=0.7; kp2=-0.14; kp0=0.835; kn=6.980;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+ case kPizeroPbPb|k0040:
+ kc=560.532; kp1=0.548; kp2=-0.048; kp0=1.055; kn=8.132;
+ return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
+ break;
+
+
+ // fit to charged pions for p-Pb @ 5.02TeV
+ case kPichargedPPb:
+ kc=235.5; ka=0.6903; kb=0.06864; kp0=2.289; kp1=0.5872; kd=0.6474; kn=7.842;
+ return PtModifiedHagedornExp2(*px,kc,ka,kb,kp0,kp1,kd,kn);
+ break;
+
+
+ // Tsallis fit to final pizero (PHOS+PCM) -> used for publication
+ // for pp @ 7 TeV
+ case kPizero7TeVpp:
+ case kPizeroEta7TeVpp:
+ km=0.13498; kc=28.01; kT=0.139; kn=6.875;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizero7TeVpplow:
+ case kPizeroEta7TeVpplow:
+ km=0.13498; kc=23.84; kT=0.147; kn=7.025;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizero7TeVpphigh:
+ case kPizeroEta7TeVpphigh:
+ km=0.13498; kc=32.47; kT=0.132; kn=6.749;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ // Tsallis fit to pizero: preliminary result from PCM and PHOS (QM'11)
+ // for pp @ 2.76 TeV
+ case kPizero2760GeVpp:
+ case kPizeroEta2760GeVpp:
+ km = 0.13498; kc = 19.75; kT = 0.130; kn = 7.051;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizero2760GeVpplow:
+ case kPizeroEta2760GeVpplow:
+ km = 0.13498; kc = 16.12; kT = 0.142; kn = 7.327;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizero2760GeVpphigh:
+ case kPizeroEta2760GeVpphigh:
+ km = 0.13498; kc = 25.18; kT = 0.118; kn = 6.782;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+
+ default:
+ return NULL;
+ }
- return invYield*(2*TMath::Pi()*x);
-
}
Double_t AliGenEMlib::YPizero( const Double_t *py, const Double_t */*dummy*/ )
}
+Double_t AliGenEMlib::V2Pizero( const Double_t *px, const Double_t */*dummy*/ )
+{
+ double n1,n2,n3,n4,n5;
+ double v1,v2,v3,v4,v5;
+ switch(fgSelectedCentrality) {
+ case k0010:
+ n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
+ v1=V2Param(px,fgkV2param[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
+ v2=V2Param(px,fgkV2param[k0510]);
+ return (n1*v1+n2*v2)/(n1+n2);
+ break;
+ case k0020:
+ n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
+ v1=V2Param(px,fgkV2param[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
+ v2=V2Param(px,fgkV2param[k0510]);
+ n3=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k1020]);
+ v3=V2Param(px,fgkV2param[k1020]);
+ return (n1*v1+n2*v2+2*n3*v3)/(n1+n2+2*n3);
+ break;
+ case k2040:
+ n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k2030]);
+ v1=V2Param(px,fgkV2param[k2030]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k3040]);
+ v2=V2Param(px,fgkV2param[k3040]);
+ return (n1*v1+n2*v2)/(n1+n2);
+ break;
+ case k0040:
+ n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
+ v1=V2Param(px,fgkV2param[k0005]);
+ n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
+ v2=V2Param(px,fgkV2param[k0510]);
+ n3=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k1020]);
+ v3=V2Param(px,fgkV2param[k1020]);
+ n4=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k2030]);
+ v4=V2Param(px,fgkV2param[k2030]);
+ n5=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k3040]);
+ v5=V2Param(px,fgkV2param[k3040]);
+ return (n1*v1+n2*v2+2*n3*v3+2*n4*v4+2*n5*v5)/(n1+n2+2*n3+2*n4+2*n5);
+ break;
+
+ default:
+ return V2Param(px,fgkV2param[fgSelectedCentrality]);
+ }
+}
+
//--------------------------------------------------------------------------
//
// Eta
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpEta(TRandom *)
{
-// Return eta pdg code
+ // Return eta pdg code
return 221;
}
Double_t AliGenEMlib::PtEta( const Double_t *px, const Double_t */*dummy*/ )
{
-// Eta pT
+
+ // fit functions and corresponding parameter of Eta pT for pp @ 2.76 TeV and @ 7 TeV
+ // and mtscaled pT
+
+ Double_t km = 0.;
+ Double_t kc = 0.;
+ Double_t kT = 0.;
+ Double_t kn = 0.;
+
+ switch(fgSelectedPtParam){
+ // Tsallis fit to final eta (PHOS+PCM) -> used for final publication
+ // for pp @ 7 TeV
+ case kPizeroEta7TeVpp:
+ km = 0.547853; kc = 2.496; kT = 0.229; kn = 6.985;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizeroEta7TeVpplow:
+ km = 0.547853; kc = 1.970; kT = 0.253; kn = 7.591;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizeroEta7TeVpphigh:
+ km = 0.547853; kc = 3.060; kT = 0.212; kn = 6.578;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ // Tsallis fit to preliminary eta (QM'11)
+ // for pp @ 2.76 TeV
+ case kPizeroEta2760GeVpp:
+ km = 0.547853; kc = 1.971; kT = 0.188; kn = 6.308;
+ return PtTsallis(*px,km,kc,kT,kn);
+ case kPizeroEta2760GeVpplow:
+ km = 0.547853; kc = 1.228; kT = 0.220; kn = 7.030;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+ case kPizeroEta2760GeVpphigh:
+ km = 0.547853; kc = 2.802; kT = 0.164; kn = 5.815;
+ return PtTsallis(*px,km,kc,kT,kn);
+ break;
+
+ default:
return MtScal(*px,1);
+ break;
+
+ }
+
}
Double_t AliGenEMlib::YEta( const Double_t *py, const Double_t */*dummy*/ )
{
return YFlat(*py);
+}
+Double_t AliGenEMlib::V2Eta( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return KEtScal(*px,1); //V2Param(px,fgkV2param[1][fgSelectedV2Param]);
}
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpRho(TRandom *)
{
-// Return rho pdg code
+ // Return rho pdg code
return 113;
}
Double_t AliGenEMlib::PtRho( const Double_t *px, const Double_t */*dummy*/ )
{
-// Rho pT
+ // Rho pT
return MtScal(*px,2);
}
Double_t AliGenEMlib::YRho( const Double_t *py, const Double_t */*dummy*/ )
{
return YFlat(*py);
+}
+Double_t AliGenEMlib::V2Rho( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return KEtScal(*px,2);
}
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpOmega(TRandom *)
{
-// Return omega pdg code
+ // Return omega pdg code
return 223;
}
Double_t AliGenEMlib::PtOmega( const Double_t *px, const Double_t */*dummy*/ )
{
-// Omega pT
+ // Omega pT
return MtScal(*px,3);
}
Double_t AliGenEMlib::YOmega( const Double_t *py, const Double_t */*dummy*/ )
{
return YFlat(*py);
+}
+Double_t AliGenEMlib::V2Omega( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return KEtScal(*px,3);
}
+
//--------------------------------------------------------------------------
//
// Etaprime
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpEtaprime(TRandom *)
{
-// Return etaprime pdg code
+ // Return etaprime pdg code
return 331;
}
Double_t AliGenEMlib::PtEtaprime( const Double_t *px, const Double_t */*dummy*/ )
{
-// Eta pT
+ // Eta pT
return MtScal(*px,4);
}
}
+Double_t AliGenEMlib::V2Etaprime( const Double_t *px, const Double_t */*dummy*/ )
+{
+ return KEtScal(*px,4);
+}
+
//--------------------------------------------------------------------------
//
// Phi
//--------------------------------------------------------------------------
Int_t AliGenEMlib::IpPhi(TRandom *)
{
-// Return phi pdg code
+ // Return phi pdg code
return 333;
}
Double_t AliGenEMlib::PtPhi( const Double_t *px, const Double_t */*dummy*/ )
{
-// Phi pT
+ // Phi pT
return MtScal(*px,5);
}
Double_t AliGenEMlib::YPhi( const Double_t *py, const Double_t */*dummy*/ )
{
return YFlat(*py);
-
}
-Double_t AliGenEMlib::YFlat(Double_t /*y*/)
+Double_t AliGenEMlib::V2Phi( const Double_t *px, const Double_t */*dummy*/ )
{
+ return KEtScal(*px,5);
+}
+
//--------------------------------------------------------------------------
//
-// flat rapidity distribution
+// Jpsi
//
//--------------------------------------------------------------------------
+Int_t AliGenEMlib::IpJpsi(TRandom *)
+{
+ // Return phi pdg code
+ return 443;
+}
+
+Double_t AliGenEMlib::PtJpsi( const Double_t *px, const Double_t */*dummy*/ )
+{
+ // Jpsi pT
+ // based on: //https://aliceinfo.cern.ch/Notes/node/242, https://aliceinfo.cern.ch/Figure/node/3457, www.sciencedirect.com/science/article/pii/S0370269312011446
+ const static Double_t jpsiPtParam[2][3] = {
+ { 9.686337e-03, 2.629441e-01, 4.552044e+00 }
+ ,{ 3.403549e-03, 2.897061e-01, 3.644278e+00 }
+ };
+ const double pt=px[0]*2.28/2.613;
+ switch(fgSelectedCentrality) {
+ case k0020: return 2.405*PtDoublePowerlaw(&pt,jpsiPtParam[0]); break;
+ case k2040: return 2.405*PtDoublePowerlaw(&pt,jpsiPtParam[1]); break;
+ case k0040: return 0.5*2.405*(PtDoublePowerlaw(&pt,jpsiPtParam[0])+PtDoublePowerlaw(&pt,jpsiPtParam[1])); break;
+ }
+ return 0;
+}
+
+Double_t AliGenEMlib::YJpsi( const Double_t *py, const Double_t */*dummy*/ )
+{
+ return YFlat(*py);
+}
+
+Double_t AliGenEMlib::V2Jpsi( const Double_t *px, const Double_t */*dummy*/ )
+{
+ const static Double_t v2Param[16] = { 1.156000e-01, 8.936854e-01, 0.000000e+00, 4.000000e+00, 6.222375e+00, -1.600314e-01, 8.766676e-01, 7.824143e+00, 1.156000e-01, 3.484503e-02, 4.413685e-01, 0, 1, 3.484503e-02, 4.413685e-01, 7.2 };
+ switch(fgSelectedCentrality){
+ case k2040: return V2Param(px,v2Param); break;
+ case k0010: return 0.43*V2Param(px,v2Param); break; //V2Pizero(0010)/V2Pizero(2040)=0.43 +-0.025
+ case k1020: return 0.75*V2Param(px,v2Param); break; //V2Pizero(1020)/V2Pizero(2040)=0.75 +-0.04
+ case k0020: return 0.66*V2Param(px,v2Param); break; //V2Pizero(0020)/V2Pizero(2040)=0.66 +-0.035
+ case k0040: return 0.82*V2Param(px,v2Param); break; //V2Pizero(0040)/V2Pizero(2040)=0.82 +-0.05
+ }
+ return 0;
+}
+
+Double_t AliGenEMlib::YFlat(Double_t /*y*/)
+{
+ //--------------------------------------------------------------------------
+ //
+ // flat rapidity distribution
+ //
+ //--------------------------------------------------------------------------
Double_t dNdy = 1.;
//
//=============================================================
//
- Double_t AliGenEMlib::MtScal(Double_t pt, Int_t np)
+Double_t AliGenEMlib::MtScal(Double_t pt, Int_t np)
{
-// Function for the calculation of the Pt distribution for a
-// given particle np, from the pizero Pt distribution using
-// mt scaling.
+ // Function for the calculation of the Pt distribution for a
+ // given particle np, from the pizero Pt distribution using
+ // mt scaling.
-// MASS 1=>PIZERO, 2=>ETA, 3=>RHO, 4=>OMEGA, 5=>ETAPRIME, 6=>PHI
+ Double_t scaledPt = sqrt(pt*pt + fgkHM[np]*fgkHM[np] - fgkHM[0]*fgkHM[0]);
+ Double_t scaledYield = PtPizero(&scaledPt, (Double_t*) 0);
- const Double_t khm[6] = {0.13498, 0.54751, 0.7755, 0.78265, 0.95778, 1.01946};
- np--;
+ // VALUE MESON/PI AT 5 GeV/c
+ Double_t NormPt = 5.;
+ Double_t scaledNormPt = sqrt(NormPt*NormPt + fgkHM[np]*fgkHM[np] - fgkHM[0]*fgkHM[0]);
- Double_t scaledPt = sqrt(pt*pt + khm[np]*khm[np] - khm[0]*khm[0]);
- Double_t scaledYield = PtPizero(&scaledPt, (Double_t*) 0);
+ Double_t norm = fgkMtFactor[int(bool(fgSelectedCentrality))][np] * (PtPizero(&NormPt, (Double_t*) 0) / PtPizero(&scaledNormPt, (Double_t*) 0));
- // VALUE MESON/PI AT 5 GEV
+ return norm*(pt/scaledPt)*scaledYield;
+}
- Double_t normPt = 5.;
- Double_t scaledNormPt = sqrt(normPt*normPt + khm[np]*khm[np] - khm[0]*khm[0]);
- const Double_t kfmax[6]={1., 0.48, 1.0, 0.9, 0.25, 0.4};
+Double_t AliGenEMlib::KEtScal(Double_t pt, Int_t np)
+{
+ const int nq=2; //number of quarks for particle np, here always 2
+ Double_t scaledPt = sqrt(pow(2.0/nq*(sqrt(pt*pt+fgkHM[np]*fgkHM[np])-fgkHM[np])+fgkHM[0],2)-fgkHM[0]*fgkHM[0]);
+ return V2Pizero(&scaledPt, (Double_t*) 0);
+}
- Double_t norm = kfmax[np] * (PtPizero(&normPt, (Double_t*) 0) / PtPizero(&scaledNormPt, (Double_t*) 0));
+Double_t AliGenEMlib::V2Param(const Double_t *px, const Double_t *par)
+{
+ // Very general parametrization of the v2
+
+ const double &pt=px[0];
+ double val=CrossOverLc(par[4],par[3],pt)*(2*par[0]/(1+TMath::Exp(par[1]*(par[2]-pt)))-par[0])+CrossOverRc(par[4],par[3],pt)*((par[8]-par[5])/(1+TMath::Exp(par[6]*(pt-par[7])))+par[5]);
+ double sys=0;
+ if(fgSelectedV2Systematic){
+ double syspt=pt>par[15]?par[15]:pt;
+ sys=fgSelectedV2Systematic*par[11+fgSelectedV2Systematic*2]*pow(syspt,par[12+fgSelectedV2Systematic*2]);
+ }
+ return std::max(val+sys,0.0);
+}
- return norm*(pt/scaledPt)*scaledYield;
+Double_t AliGenEMlib::V2Flat(const Double_t */*px*/, const Double_t */*param*/)
+{
+ // Flat v2
+
+ return 0.0;
+}
+
+Double_t AliGenEMlib::GetTAA(Int_t cent){
+ const static Double_t taa[16] = { 1.0, // pp
+ 26.32, // 0-5
+ 20.56, // 5-10
+ 14.39, // 10-20
+ 8.70, // 20-30
+ 5.001, // 30-40
+ 2.675, // 40-50
+ 1.317, // 50-60
+ 23.44, // 0-10
+ 6.85, // 20-40
+ 1.996, // 40-60
+ 0.4174, // 60-80
+ 18.91, // 0-20
+ 12.88, // 0-40
+ 3.088, // 20-80
+ 1.207}; // 40-80
+ return taa[cent];
}
//==========================================================================
GenFunc AliGenEMlib::GetPt(Int_t param, const char * tname) const
{
-// Return pointer to pT parameterisation
+ // Return pointer to pT parameterisation
GenFunc func=0;
TString sname(tname);
switch (param)
{
+ case kDirectRealGamma:
+ func=PtDirectRealGamma;
+ break;
+ case kDirectVirtGamma:
+ func=PtDirectVirtGamma;
+ break;
case kPizero:
func=PtPizero;
break;
case kPhi:
func=PtPhi;
break;
+ case kJpsi:
+ func=PtJpsi;
+ break;
default:
func=0;
GenFunc AliGenEMlib::GetY(Int_t param, const char * tname) const
{
-// Return pointer to y- parameterisation
+ // Return pointer to y- parameterisation
GenFunc func=0;
TString sname(tname);
switch (param)
{
+ case kDirectRealGamma:
+ func=YDirectRealGamma;
+ break;
+ case kDirectVirtGamma:
+ func=YDirectVirtGamma;
+ break;
case kPizero:
func=YPizero;
break;
case kPhi:
func=YPhi;
break;
+ case kJpsi:
+ func=YJpsi;
+ break;
default:
func=0;
GenFuncIp AliGenEMlib::GetIp(Int_t param, const char * tname) const
{
-// Return pointer to particle type parameterisation
+ // Return pointer to particle type parameterisation
GenFuncIp func=0;
TString sname(tname);
switch (param)
{
+ case kDirectRealGamma:
+ func=IpDirectRealGamma;
+ break;
+ case kDirectVirtGamma:
+ func=IpDirectVirtGamma;
+ break;
case kPizero:
func=IpPizero;
break;
case kPhi:
func=IpPhi;
break;
+ case kJpsi:
+ func=IpJpsi;
+ break;
default:
func=0;
return func;
}
+GenFunc AliGenEMlib::GetV2(Int_t param, const char * tname) const
+{
+ // Return pointer to v2-parameterisation
+ GenFunc func=0;
+ TString sname(tname);
+ switch (param)
+ {
+ case kDirectRealGamma:
+ func=V2DirectRealGamma;
+ break;
+ case kDirectVirtGamma:
+ func=V2DirectVirtGamma;
+ break;
+ case kPizero:
+ func=V2Pizero;
+ break;
+ case kEta:
+ func=V2Eta;
+ break;
+ case kRho:
+ func=V2Pizero;
+ break;
+ case kOmega:
+ func=V2Pizero;
+ break;
+ case kEtaprime:
+ func=V2Pizero;
+ break;
+ case kPhi:
+ func=V2Pizero;
+ break;
+ case kJpsi:
+ func=V2Jpsi;
+ break;
-
-
-
-
-
-
-
-
+ default:
+ func=0;
+ printf("<AliGenEMlib::GetV2> unknown parametrisation\n");
+ }
+ return func;
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff