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e40b9538 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/* $Id: AliGenEMlib.cxx 30052 2008-11-25 14:54:18Z morsch $ */
17
18/////////////////////////////////////////////////////////////////////////////
19// //
20// Implementation of AliGenEMlib for electron, di-electron, and photon //
21// cocktail calculations. //
22// It is based on AliGenGSIlib. //
23// //
24// Responsible: R.Averbeck@gsi.de //
25// //
26/////////////////////////////////////////////////////////////////////////////
27
28
4ae1c9f0 29#include <Riostream.h>
e40b9538 30#include "TMath.h"
31#include "TRandom.h"
32#include "TString.h"
33#include "AliGenEMlib.h"
34
35
36ClassImp(AliGenEMlib)
37
4ae1c9f0 38//Initializers for static members
39Int_t AliGenEMlib::fgSelectedPtParam=AliGenEMlib::kPizero7TeVpp;
40Int_t AliGenEMlib::fgSelectedCentrality=AliGenEMlib::kpp;
41Int_t AliGenEMlib::fgSelectedV2Systematic=AliGenEMlib::kNoV2Sys;
6078e216 42
5a516e0a 43Double_t AliGenEMlib::CrossOverLc(double a, double b, double x){
4ae1c9f0 44 if(x<b-a/2) return 1.0;
6078e216 45 else if(x>b+a/2) return 0.0;
46 else return cos(((x-b)/a+0.5)*TMath::Pi())/2+0.5;
47}
5a516e0a 48Double_t AliGenEMlib::CrossOverRc(double a, double b, double x){
6078e216 49 return 1-CrossOverLc(a,b,x);
50}
51
1b589c8a 52const Double_t AliGenEMlib::fgkV2param[kCentralities][16] = {
6a8b015a 53 // charged pion cent, based on: https://twiki.cern.ch/twiki/bin/viewauth/ALICE/FlowPAGQM2012talkIdentified
1b589c8a 54 { 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
55 ,{ 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
56 ,{ 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
57 ,{ 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
58 ,{ 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
59 ,{ 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
60 ,{ 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
61 ,{ 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
62 ,{ 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
63 ,{ 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
64 ,{ 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
65 ,{ 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
66 ,{ 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
67 ,{ 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
68 ,{ 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
69 ,{ 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
4ae1c9f0 70};
71
1b589c8a 72const Double_t AliGenEMlib::fgkRawPtOfV2Param[kCentralities][10] = {
71443190 73 { 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // pp no V2
74 ,{ 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
75 ,{ 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
76 ,{ 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
77 ,{ 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
78 ,{ 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
79 ,{ 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
80 ,{ 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
81 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-10
82 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-40
83 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-60
84 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 60-80
85 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-20
86 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-40
87 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-80
88 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-80
89};
90
1b589c8a 91const Double_t AliGenEMlib::fgkPtParam[kCentralities][10] = {
92 { 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // pp no V2
93 ,{ 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
94 ,{ 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
95 ,{ 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
96 ,{ 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
97 ,{ 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
06e32752 98 ,{ 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
99 ,{ 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
1b589c8a 100 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-10
101 ,{ 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
102 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-60
103 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 60-80
104 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-20
105 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 0-40
106 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 20-80
107 ,{ 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000,-1.0000000000, 1.0000000000,-1.0000000000, 1.0000000000, 0.0000000000, 0.0000000000 } // 40-80
108};
109
110const Double_t AliGenEMlib::fgkThermPtParam[kCentralities][2] = {
71443190 111 { 0.0000000000, 0.0000000000 } // pp no V2
112 ,{ 0.0000000000, 0.0000000000 } // 0-5
113 ,{ 0.0000000000, 0.0000000000 } // 5-10
1b589c8a 114 ,{ 3.335661e+01, 3.400585e+00 } // 10-20 //based on: https://aliceinfo.cern.ch/Notes/node/249
71443190 115 ,{ 0.0000000000, 0.0000000000 } // 20-30
116 ,{ 0.0000000000, 0.0000000000 } // 30-40
117 ,{ 0.0000000000, 0.0000000000 } // 40-50
118 ,{ 0.0000000000, 0.0000000000 } // 50-60
1b589c8a 119 ,{ 3.648327e+02, 4.477749e+00 } // 0-10 //based on: https://aliceinfo.cern.ch/Notes/node/249
120 ,{ 1.696223e+00, 2.429660e+00 } // 20-40 //based on: https://twiki.cern.ch/twiki/pub/ALICE/ALICEDirectPhotonSpectrumPaper/directPbPb.pdf
71443190 121 ,{ 0.0000000000, 0.0000000000 } // 40-60
122 ,{ 0.0000000000, 0.0000000000 } // 60-80
1b589c8a 123 ,{ 1.492160e+01, 2.805213e+00 } // 0-20 //based on: https://twiki.cern.ch/twiki/pub/ALICE/ALICEDirectPhotonSpectrumPaper/directPbPb.pdf
124 ,{ 4.215110e+01, 3.242719e+00 } // 0-40 //based on: https://aliceinfo.cern.ch/Figure/node/2866
71443190 125 ,{ 0.0000000000, 0.0000000000 } // 20-80
126 ,{ 0.0000000000, 0.0000000000 } // 40-80
127};
128
4ae1c9f0 129// MASS 0=>PIZERO, 1=>ETA, 2=>RHO, 3=>OMEGA, 4=>ETAPRIME, 5=>PHI, 6=>JPSI
71443190 130const Double_t AliGenEMlib::fgkHM[8] = {0.13498, 0.54751, 0.7755, 0.78265, 0.95778, 1.01946, 3.0969, 0.0};
4ae1c9f0 131
71443190 132const Double_t AliGenEMlib::fgkMtFactor[2][8] = {
4ae1c9f0 133 // {1.0, 0.5, 1.0, 0.9, 0.4, 0.23, 0.054}, // factor for pp from arXiv:1110.3929
134 // {1.0, 0.55, 1.0, 0.9, 0.4, 0.25, 0.004} // factor for PbPb from arXiv:1110.3929
135 //{1., 0.48, 1.0, 0.9, 0.25, 0.4}, (old values)
136 //{1., 0.48, 1.0, 0.9, 0.4, 0.25}, (nlo values)
137 //{1., 0.48, 1.0, 0.8, 0.4, 0.2, 0.06} (combination of nlo and LHC measurements)
138 //https://aliceinfo.cern.ch/Figure/node/2634
139 //https://aliceinfo.cern.ch/Figure/node/2788
140 //https://aliceinfo.cern.ch/Figure/node/4403
71443190 141 //https://aliceinfo.cern.ch/Notes/node/87
4ae1c9f0 142 //best guess:
6a8b015a 143 {1., 0.48, 1.0, 0.9, 0.4, 0.25, 0., 0.}, //pp
144 {1., 0.48, 1.0, 0.9, 0.4, 0.25, 0., 0.} //PbPb
4ae1c9f0 145};
6078e216 146
e40b9538 147//==========================================================================
148//
149// Definition of Particle Distributions
150//
151//==========================================================================
152
4ae1c9f0 153//--------------------------------------------------------------------------
154//
155// General functions
156//
157//--------------------------------------------------------------------------
5a516e0a 158Double_t AliGenEMlib::PtModifiedHagedornThermal(Double_t pt,
159 Double_t c,
160 Double_t p0,
161 Double_t p1,
162 Double_t n,
163 Double_t cT,
164 Double_t T)
4ae1c9f0 165{
166 // Modified Hagedorn Thermal fit to Picharged for PbPb:
167 Double_t invYield;
168 invYield = c/TMath::Power(p0+pt/p1,n) + cT*exp(-1.0*pt/T);
169
170 return invYield*(2*TMath::Pi()*pt);
171}
172
173
174
5a516e0a 175Double_t AliGenEMlib::PtModifiedHagedornExp(Double_t pt,
176 Double_t c,
177 Double_t p1,
178 Double_t p2,
179 Double_t p0,
180 Double_t n)
4ae1c9f0 181{
182 // Modified Hagedorn exponentiel fit to Pizero for PbPb:
183 Double_t invYield;
184 invYield = c*TMath::Power(exp(-1*(p1*pt-p2*pt*pt))+pt/p0,-n);
185
186 return invYield*(2*TMath::Pi()*pt);
187}
188
189
5a516e0a 190Double_t AliGenEMlib::PtModifiedHagedornExp2(Double_t pt,
191 Double_t c,
192 Double_t a,
193 Double_t b,
194 Double_t p0,
195 Double_t p1,
196 Double_t d,
197 Double_t n)
4ae1c9f0 198{
199 // Modified Hagedorn exponential fit to charged pions for pPb:
200 Double_t invYield;
201 invYield = c*TMath::Power(exp(-a*pt-b*pt*pt)+pt/p0+TMath::Power(pt/p1,d),-n);
202
203 return invYield*(2*TMath::Pi()*pt);
204}
205
5a516e0a 206Double_t AliGenEMlib::PtTsallis(Double_t pt,
207 Double_t m,
208 Double_t c,
209 Double_t T,
210 Double_t n)
4ae1c9f0 211{
212 // Tsallis fit to Pizero for pp:
213 Double_t mt;
214 Double_t invYield;
215
216 mt = sqrt(m*m + pt*pt);
217 invYield = c*((n-1.)*(n-2.))/(n*T*(n*T+m*(n-2.)))*pow(1.+(mt-m)/(n*T),-n);
218
219 return invYield*(2*TMath::Pi()*pt);
220}
221
71443190 222// Exponential
223Double_t AliGenEMlib::PtExponential(const Double_t *px, const Double_t *c){
224 const double &pt=px[0];
225 Double_t invYield = c[0]*exp(-pt*c[1]);
226
227 return invYield*(2*TMath::Pi()*pt);
228}
229
230// Hagedorn with additional Powerlaw
231Double_t AliGenEMlib::PtModifiedHagedornPowerlaw(const Double_t *px, const Double_t *c){
6a8b015a 232 const double &pt=px[0];
233 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
71443190 234
1b589c8a 235 return invYield*(2*TMath::Pi()*pt+0.001); //pt+0.001: be sure to be > 0
71443190 236}
237
6a8b015a 238// double powerlaw for J/Psi yield
239Double_t AliGenEMlib::PtDoublePowerlaw(const Double_t *px, const Double_t *c){
240 const double &pt=px[0];
241 Double_t yield = c[0]*pt*pow(1+pow(pt*c[1],2),-c[2]);
242
243 return yield;
244}
245
246// integral over krollwada with S=1^2*(1-mee^2/mh^2)^3 from mee=0 up to mee=mh
247// approximation is perfect for mh>20MeV
248Double_t AliGenEMlib::IntegratedKrollWada(const Double_t *mh, const Double_t *){
249 if(*mh<0.002941) return 0;
250 return 2*log(*mh/0.000511/exp(1.75))/411.11/TMath::Pi();
71443190 251}
252
253//--------------------------------------------------------------------------
254//
6a8b015a 255// DirectRealGamma
71443190 256//
257//--------------------------------------------------------------------------
71443190 258Double_t AliGenEMlib::PtPromptRealGamma( const Double_t *px, const Double_t */*dummy*/ )
259{
6a8b015a 260 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 };
71443190 261
262 return PtModifiedHagedornPowerlaw(px,promptGammaPtParam)*GetTAA(fgSelectedCentrality);
263}
264
6a8b015a 265Double_t AliGenEMlib::PtThermalRealGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 266{
6a8b015a 267 return PtExponential(px,fgkThermPtParam[fgSelectedCentrality]);
71443190 268}
269
6a8b015a 270Double_t AliGenEMlib::PtDirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 271{
6a8b015a 272 return PtPromptRealGamma(px,px)+PtThermalRealGamma(px,px);
71443190 273}
274
6a8b015a 275Int_t AliGenEMlib::IpDirectRealGamma(TRandom *)
71443190 276{
6a8b015a 277 return 22;
71443190 278}
279
6a8b015a 280Double_t AliGenEMlib::YDirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 281{
282 return YFlat(*px);
283}
284
6a8b015a 285Double_t AliGenEMlib::V2DirectRealGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 286{
1b589c8a 287 const static Double_t v2Param[3][16] = {
288 { 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
289 ,{ 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
290 ,{ 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
6a8b015a 291 };
1b589c8a 292 switch(fgSelectedCentrality){
6a8b015a 293 case k0020: return V2Param(px,v2Param[0]); break;
294 case k2040: return V2Param(px,v2Param[1]); break;
295 case k0040: return V2Param(px,v2Param[2]); break;
1b589c8a 296 // case k0010: return 0.43*V2Param(px,v2Param[1]); break; //V2Pizero(0010)/V2Pizero(2040)=0.43 +-0.025
297 // case k1020: return 0.75*V2Param(px,v2Param[1]); break; //V2Pizero(1020)/V2Pizero(2040)=0.75 +-0.04
298 case k0010: return 0.53*V2Param(px,v2Param[2]); break; //V2Pizero(0010)/V2Pizero(0040)=0.53 +-0.03
299 case k1020: return 0.91*V2Param(px,v2Param[2]); break; //V2Pizero(1020)/V2Pizero(0040)=0.91 +-0.04
6a8b015a 300 }
301 return 0;
71443190 302}
303
6a8b015a 304
71443190 305//--------------------------------------------------------------------------
306//
6a8b015a 307// DirectVirtGamma
71443190 308//
309//--------------------------------------------------------------------------
6a8b015a 310Double_t AliGenEMlib::PtPromptVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 311{
6a8b015a 312 return IntegratedKrollWada(px,px)*PtPromptRealGamma(px,px);
71443190 313}
314
6a8b015a 315Double_t AliGenEMlib::PtThermalVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 316{
6a8b015a 317 return IntegratedKrollWada(px,px)*PtThermalRealGamma(px,px);
71443190 318}
319
6a8b015a 320Double_t AliGenEMlib::PtDirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 321{
1b589c8a 322 return IntegratedKrollWada(px,px)*PtDirectRealGamma(px,px);
71443190 323}
324
6a8b015a 325Int_t AliGenEMlib::IpDirectVirtGamma(TRandom *)
71443190 326{
6a8b015a 327 return 220000;
71443190 328}
329
6a8b015a 330Double_t AliGenEMlib::YDirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 331{
332 return YFlat(*px);
333}
4ae1c9f0 334
6a8b015a 335Double_t AliGenEMlib::V2DirectVirtGamma( const Double_t *px, const Double_t */*dummy*/ )
71443190 336{
6a8b015a 337 return V2DirectRealGamma(px,px);
71443190 338}
4ae1c9f0 339
e40b9538 340//--------------------------------------------------------------------------
341//
342// Pizero
343//
344//--------------------------------------------------------------------------
345Int_t AliGenEMlib::IpPizero(TRandom *)
346{
4ae1c9f0 347 // Return pizero pdg code
e40b9538 348 return 111;
349}
350
351Double_t AliGenEMlib::PtPizero( const Double_t *px, const Double_t */*dummy*/ )
352{
6a8b015a 353 // double pigammacorr=1; //misuse pion for direct gammas, tuned for 0040, iteration 0
354 // pigammacorr*=2.258900e-01*log(*px+0.001)+1.591291e+00; //iteration 1
355 // pigammacorr*=6.601943e-03*log(*px+0.001)+9.593698e-01; //iteration 2
356 // pigammacorr*=4.019933e-03*log(*px+0.001)+9.843412e-01; //iteration 3
357 // pigammacorr*=-4.543991e-03*log(*px+0.001)+1.010886e+00; //iteration 4
358 // return pigammacorr*PtPromptRealGamma(px,px); //now the gammas from the pi->gg decay have the pt spectrum of prompt real gammas
71443190 359
4ae1c9f0 360 // fit functions and corresponding parameter of Pizero pT for pp @ 2.76 TeV and @ 7 TeV and for PbPb @ 2.76 TeV
361
362 Double_t km=0.;
363 Double_t kc=0.;
364 Double_t kn=0.;
365 Double_t kcT=0.;
366 Double_t kT=0.;
367 Double_t kp0=0.;
368 Double_t kp1=0.;
369 Double_t kp2=0.;
370 Double_t ka=0.;
371 Double_t kb=0.;
372 Double_t kd=0.;
373
1b589c8a 374 double n1,n2,n3,n4;
6a8b015a 375 int oldCent;
376
4ae1c9f0 377 switch(fgSelectedPtParam|fgSelectedCentrality) {
1b589c8a 378 // fit to pi charged, same data like in kPiOldChargedPbPb,
379 // but tested and compared against newest (2014) neutral pi measurement
380 case kPichargedPbPb|k0005:
381 case kPichargedPbPb|k0510:
382 case kPichargedPbPb|k1020:
383 case kPichargedPbPb|k2030:
384 case kPichargedPbPb|k3040:
385 case kPichargedPbPb|k4050:
386 case kPichargedPbPb|k5060:
387 case kPichargedPbPb|k2040:
388 return PtModifiedHagedornPowerlaw(px,fgkPtParam[fgSelectedCentrality]);
389 break;
390 case kPichargedPbPb|k0010:
391 n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
392 n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
393 return (n1+n2)/2;
394 break;
395 case kPichargedPbPb|k0020:
396 n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
397 n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
398 n3=PtModifiedHagedornPowerlaw(px,fgkPtParam[k1020]);
399 return (n1+n2+2*n3)/4;
400 break;
401 case kPichargedPbPb|k0040:
402 n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0005]);
403 n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k0510]);
404 n3=PtModifiedHagedornPowerlaw(px,fgkPtParam[k1020]);
405 n4=PtModifiedHagedornPowerlaw(px,fgkPtParam[k2040]);
406 return (n1+n2+2*n3+4*n4)/8;
407 break;
408 case kPichargedPbPb|k4060:
409 n1=PtModifiedHagedornPowerlaw(px,fgkPtParam[k4050]);
410 n2=PtModifiedHagedornPowerlaw(px,fgkPtParam[k5060]);
411 return (n1+n2)/2;
412 break;
413
414
4ae1c9f0 415 // fit to pi charged v1
416 // charged pion from ToF, unidentified hadrons scaled with pion from TPC
417 // for Pb-Pb @ 2.76 TeV
1b589c8a 418 case kPiOldChargedPbPb|k0005:
4ae1c9f0 419 kc=1347.5; kp0=0.9393; kp1=2.254; kn=11.294; kcT=0.002537; kT=2.414;
420 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
421 break;
1b589c8a 422 case kPiOldChargedPbPb|k0510:
4ae1c9f0 423 kc=1256.1; kp0=0.9545; kp1=2.248; kn=11.291; kcT=0.002662; kT=2.326;
424 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
425 break;
1b589c8a 426 case kPiOldChargedPbPb|k2030:
4ae1c9f0 427 kc=7421.6; kp0=1.2059; kp1=1.520; kn=10.220; kcT=0.002150; kT=2.196;
428 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
429 break;
1b589c8a 430 case kPiOldChargedPbPb|k3040:
4ae1c9f0 431 kc=1183.2; kp0=1.0478; kp1=1.623; kn=9.8073; kcT=0.00198333; kT=2.073;
432 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
433 break;
434 // the following is what went into the Pb-Pb preliminary approval (0-10%)
1b589c8a 435 case kPiOldChargedPbPb|k0010:
4ae1c9f0 436 kc=1296.0; kp0=0.968; kp1=2.567; kn=12.27; kcT=0.004219; kT=2.207;
437 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
438 break;
1b589c8a 439 case kPiOldChargedPbPb|k1020:
4ae1c9f0 440 kc=986.0; kp0=0.9752; kp1=2.376; kn=11.62; kcT=0.003116; kT=2.213;
441 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
442 break;
1b589c8a 443 case kPiOldChargedPbPb|k2040:
4ae1c9f0 444 kc=17337.0; kp0=1.337; kp1=1.507; kn=10.629; kcT=0.00184; kT=2.234;
445 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
446 break;
1b589c8a 447 case kPiOldChargedPbPb|k4050:
4ae1c9f0 448 kc=6220.0; kp0=1.322; kp1=1.224; kn=9.378; kcT=0.000595; kT=2.383;
449 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
450 break;
1b589c8a 451 case kPiOldChargedPbPb|k5060:
4ae1c9f0 452 kc=2319.0; kp0=1.267; kp1=1.188; kn=9.044; kcT=0.000437; kT=2.276;
453 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
454 break;
1b589c8a 455 case kPiOldChargedPbPb|k4060:
4ae1c9f0 456 kc=4724.0; kp0=1.319; kp1=1.195; kn=9.255; kcT=0.000511; kT=2.344;
457 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
458 break;
1b589c8a 459 case kPiOldChargedPbPb|k6080:
4ae1c9f0 460 kc=2842.0; kp0=1.465; kp1=0.8324; kn=8.167; kcT=0.0001049; kT=2.29;
461 return PtModifiedHagedornThermal(*px,kc,kp0,kp1,kn,kcT,kT);
462 break;
1b589c8a 463 case kPiOldChargedPbPb|k0020:
6a8b015a 464 oldCent=fgSelectedCentrality;
465 fgSelectedCentrality=k0010;
466 n1=PtPizero(px,px);
467 fgSelectedCentrality=k1020;
468 n2=PtPizero(px,px);
469 fgSelectedCentrality=oldCent;
470 return (n1+n2)/2;
471 break;
1b589c8a 472 case kPiOldChargedPbPb|k0040:
6a8b015a 473 oldCent=fgSelectedCentrality;
474 fgSelectedCentrality=k0010;
475 n1=PtPizero(px,px);
476 fgSelectedCentrality=k1020;
477 n2=PtPizero(px,px);
478 fgSelectedCentrality=k2040;
479 n3=PtPizero(px,px);
480 fgSelectedCentrality=oldCent;
481 return (n1+n2+2*n3)/4;
482 break;
6078e216 483
4ae1c9f0 484 // fit to pizero from conversion analysis
485 // for PbPb @ 2.76 TeV
486 // Pi0 spectra --> not final results
487 case kPizeroPbPb|k0005:
488 kc=1952.832; kp1=0.264; kp2=0.069; kp0=1.206; kn=9.732;
489 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
490 break;
491 case kPizeroPbPb|k0010:
492 kc=1810.029; kp1=0.291; kp2=0.059; kp0=1.170; kn=9.447;
493 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
494 break;
495 case kPizeroPbPb|k0020:
496 kc=856.241; kp1=-0.409; kp2=-0.127; kp0=1.219; kn=9.030;
497 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
498 break;
499 case kPizeroPbPb|k1020:
500 kc=509.781; kp1=-0.784; kp2=-0.120; kp0=0.931; kn=7.299;
501 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
502 break;
503 case kPizeroPbPb|k2040:
504 kc=541.049; kp1=0.542; kp2=-0.069; kp0=0.972; kn=7.866;
505 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
506 break;
507 case kPizeroPbPb|k2080:
508 kc=222.577; kp1=0.634; kp2=0.009; kp0=0.915; kn=7.431;
509 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
510 break;
511 case kPizeroPbPb|k4080:
512 kc=120.153; kp1=0.7; kp2=-0.14; kp0=0.835; kn=6.980;
513 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
514 break;
515 case kPizeroPbPb|k0040:
516 kc=560.532; kp1=0.548; kp2=-0.048; kp0=1.055; kn=8.132;
517 return PtModifiedHagedornExp(*px,kc,kp1,kp2,kp0,kn);
518 break;
519
520
521 // fit to charged pions for p-Pb @ 5.02TeV
522 case kPichargedPPb:
523 kc=235.5; ka=0.6903; kb=0.06864; kp0=2.289; kp1=0.5872; kd=0.6474; kn=7.842;
524 return PtModifiedHagedornExp2(*px,kc,ka,kb,kp0,kp1,kd,kn);
525 break;
526
527
528 // Tsallis fit to final pizero (PHOS+PCM) -> used for publication
529 // for pp @ 7 TeV
530 case kPizero7TeVpp:
531 case kPizeroEta7TeVpp:
532 km=0.13498; kc=28.01; kT=0.139; kn=6.875;
533 return PtTsallis(*px,km,kc,kT,kn);
534 break;
535 case kPizero7TeVpplow:
536 case kPizeroEta7TeVpplow:
537 km=0.13498; kc=23.84; kT=0.147; kn=7.025;
538 return PtTsallis(*px,km,kc,kT,kn);
539 break;
540 case kPizero7TeVpphigh:
541 case kPizeroEta7TeVpphigh:
542 km=0.13498; kc=32.47; kT=0.132; kn=6.749;
543 return PtTsallis(*px,km,kc,kT,kn);
544 break;
545 // Tsallis fit to pizero: preliminary result from PCM and PHOS (QM'11)
546 // for pp @ 2.76 TeV
547 case kPizero2760GeVpp:
548 case kPizeroEta2760GeVpp:
549 km = 0.13498; kc = 19.75; kT = 0.130; kn = 7.051;
550 return PtTsallis(*px,km,kc,kT,kn);
551 break;
552 case kPizero2760GeVpplow:
553 case kPizeroEta2760GeVpplow:
554 km = 0.13498; kc = 16.12; kT = 0.142; kn = 7.327;
555 return PtTsallis(*px,km,kc,kT,kn);
556 break;
557 case kPizero2760GeVpphigh:
558 case kPizeroEta2760GeVpphigh:
559 km = 0.13498; kc = 25.18; kT = 0.118; kn = 6.782;
560 return PtTsallis(*px,km,kc,kT,kn);
561 break;
562
563 default:
564 return NULL;
565 }
566
e40b9538 567}
568
569Double_t AliGenEMlib::YPizero( const Double_t *py, const Double_t */*dummy*/ )
570{
571 return YFlat(*py);
572
573}
574
6078e216 575Double_t AliGenEMlib::V2Pizero( const Double_t *px, const Double_t */*dummy*/ )
576{
6a8b015a 577 double n1,n2,n3,n4,n5;
578 double v1,v2,v3,v4,v5;
4ae1c9f0 579 switch(fgSelectedCentrality) {
580 case k0010:
71443190 581 n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
582 v1=V2Param(px,fgkV2param[k0005]);
583 n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
584 v2=V2Param(px,fgkV2param[k0510]);
4ae1c9f0 585 return (n1*v1+n2*v2)/(n1+n2);
586 break;
6a8b015a 587 case k0020:
588 n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
589 v1=V2Param(px,fgkV2param[k0005]);
590 n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
591 v2=V2Param(px,fgkV2param[k0510]);
592 n3=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k1020]);
593 v3=V2Param(px,fgkV2param[k1020]);
594 return (n1*v1+n2*v2+2*n3*v3)/(n1+n2+2*n3);
595 break;
4ae1c9f0 596 case k2040:
71443190 597 n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k2030]);
598 v1=V2Param(px,fgkV2param[k2030]);
599 n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k3040]);
600 v2=V2Param(px,fgkV2param[k3040]);
4ae1c9f0 601 return (n1*v1+n2*v2)/(n1+n2);
602 break;
6a8b015a 603 case k0040:
604 n1=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0005]);
605 v1=V2Param(px,fgkV2param[k0005]);
606 n2=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k0510]);
607 v2=V2Param(px,fgkV2param[k0510]);
608 n3=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k1020]);
609 v3=V2Param(px,fgkV2param[k1020]);
610 n4=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k2030]);
611 v4=V2Param(px,fgkV2param[k2030]);
612 n5=PtModifiedHagedornPowerlaw(px,fgkRawPtOfV2Param[k3040]);
613 v5=V2Param(px,fgkV2param[k3040]);
614 return (n1*v1+n2*v2+2*n3*v3+2*n4*v4+2*n5*v5)/(n1+n2+2*n3+2*n4+2*n5);
615 break;
4ae1c9f0 616
617 default:
618 return V2Param(px,fgkV2param[fgSelectedCentrality]);
619 }
6078e216 620}
621
e40b9538 622//--------------------------------------------------------------------------
623//
624// Eta
625//
626//--------------------------------------------------------------------------
627Int_t AliGenEMlib::IpEta(TRandom *)
628{
4ae1c9f0 629 // Return eta pdg code
e40b9538 630 return 221;
631}
632
633Double_t AliGenEMlib::PtEta( const Double_t *px, const Double_t */*dummy*/ )
634{
4ae1c9f0 635
636 // fit functions and corresponding parameter of Eta pT for pp @ 2.76 TeV and @ 7 TeV
637 // and mtscaled pT
638
639 Double_t km = 0.;
640 Double_t kc = 0.;
641 Double_t kT = 0.;
642 Double_t kn = 0.;
643
644 switch(fgSelectedPtParam){
645 // Tsallis fit to final eta (PHOS+PCM) -> used for final publication
646 // for pp @ 7 TeV
647 case kPizeroEta7TeVpp:
648 km = 0.547853; kc = 2.496; kT = 0.229; kn = 6.985;
649 return PtTsallis(*px,km,kc,kT,kn);
650 break;
651 case kPizeroEta7TeVpplow:
652 km = 0.547853; kc = 1.970; kT = 0.253; kn = 7.591;
653 return PtTsallis(*px,km,kc,kT,kn);
654 break;
655 case kPizeroEta7TeVpphigh:
656 km = 0.547853; kc = 3.060; kT = 0.212; kn = 6.578;
657 return PtTsallis(*px,km,kc,kT,kn);
658 break;
659 // Tsallis fit to preliminary eta (QM'11)
660 // for pp @ 2.76 TeV
661 case kPizeroEta2760GeVpp:
662 km = 0.547853; kc = 1.971; kT = 0.188; kn = 6.308;
663 return PtTsallis(*px,km,kc,kT,kn);
664 case kPizeroEta2760GeVpplow:
665 km = 0.547853; kc = 1.228; kT = 0.220; kn = 7.030;
666 return PtTsallis(*px,km,kc,kT,kn);
667 break;
668 case kPizeroEta2760GeVpphigh:
669 km = 0.547853; kc = 2.802; kT = 0.164; kn = 5.815;
670 return PtTsallis(*px,km,kc,kT,kn);
671 break;
672
673 default:
0db2f441 674 return MtScal(*px,1);
4ae1c9f0 675 break;
676
677 }
678
e40b9538 679}
680
681Double_t AliGenEMlib::YEta( const Double_t *py, const Double_t */*dummy*/ )
682{
683 return YFlat(*py);
6078e216 684}
e40b9538 685
6078e216 686Double_t AliGenEMlib::V2Eta( const Double_t *px, const Double_t */*dummy*/ )
687{
4ae1c9f0 688 return KEtScal(*px,1); //V2Param(px,fgkV2param[1][fgSelectedV2Param]);
e40b9538 689}
690
691//--------------------------------------------------------------------------
692//
693// Rho
694//
695//--------------------------------------------------------------------------
696Int_t AliGenEMlib::IpRho(TRandom *)
697{
4ae1c9f0 698 // Return rho pdg code
e40b9538 699 return 113;
700}
701
702Double_t AliGenEMlib::PtRho( const Double_t *px, const Double_t */*dummy*/ )
703{
4ae1c9f0 704 // Rho pT
0db2f441 705 return MtScal(*px,2);
e40b9538 706}
707
708Double_t AliGenEMlib::YRho( const Double_t *py, const Double_t */*dummy*/ )
709{
710 return YFlat(*py);
4ae1c9f0 711}
e40b9538 712
4ae1c9f0 713Double_t AliGenEMlib::V2Rho( const Double_t *px, const Double_t */*dummy*/ )
714{
715 return KEtScal(*px,2);
e40b9538 716}
717
718//--------------------------------------------------------------------------
719//
720// Omega
721//
722//--------------------------------------------------------------------------
723Int_t AliGenEMlib::IpOmega(TRandom *)
724{
4ae1c9f0 725 // Return omega pdg code
e40b9538 726 return 223;
727}
728
729Double_t AliGenEMlib::PtOmega( const Double_t *px, const Double_t */*dummy*/ )
730{
4ae1c9f0 731 // Omega pT
0db2f441 732 return MtScal(*px,3);
e40b9538 733}
734
735Double_t AliGenEMlib::YOmega( const Double_t *py, const Double_t */*dummy*/ )
736{
737 return YFlat(*py);
4ae1c9f0 738}
e40b9538 739
4ae1c9f0 740Double_t AliGenEMlib::V2Omega( const Double_t *px, const Double_t */*dummy*/ )
741{
742 return KEtScal(*px,3);
e40b9538 743}
744
4ae1c9f0 745
e40b9538 746//--------------------------------------------------------------------------
747//
748// Etaprime
749//
750//--------------------------------------------------------------------------
751Int_t AliGenEMlib::IpEtaprime(TRandom *)
752{
4ae1c9f0 753 // Return etaprime pdg code
e40b9538 754 return 331;
755}
756
757Double_t AliGenEMlib::PtEtaprime( const Double_t *px, const Double_t */*dummy*/ )
758{
4ae1c9f0 759 // Eta pT
0db2f441 760 return MtScal(*px,4);
e40b9538 761}
762
763Double_t AliGenEMlib::YEtaprime( const Double_t *py, const Double_t */*dummy*/ )
764{
765 return YFlat(*py);
766
767}
768
4ae1c9f0 769Double_t AliGenEMlib::V2Etaprime( const Double_t *px, const Double_t */*dummy*/ )
770{
771 return KEtScal(*px,4);
772}
773
e40b9538 774//--------------------------------------------------------------------------
775//
776// Phi
777//
778//--------------------------------------------------------------------------
779Int_t AliGenEMlib::IpPhi(TRandom *)
780{
4ae1c9f0 781 // Return phi pdg code
e40b9538 782 return 333;
783}
784
785Double_t AliGenEMlib::PtPhi( const Double_t *px, const Double_t */*dummy*/ )
786{
4ae1c9f0 787 // Phi pT
0db2f441 788 return MtScal(*px,5);
e40b9538 789}
790
791Double_t AliGenEMlib::YPhi( const Double_t *py, const Double_t */*dummy*/ )
792{
793 return YFlat(*py);
e40b9538 794}
795
4ae1c9f0 796Double_t AliGenEMlib::V2Phi( const Double_t *px, const Double_t */*dummy*/ )
e40b9538 797{
4ae1c9f0 798 return KEtScal(*px,5);
799}
800
e40b9538 801//--------------------------------------------------------------------------
802//
4ae1c9f0 803// Jpsi
e40b9538 804//
805//--------------------------------------------------------------------------
4ae1c9f0 806Int_t AliGenEMlib::IpJpsi(TRandom *)
807{
808 // Return phi pdg code
809 return 443;
810}
811
812Double_t AliGenEMlib::PtJpsi( const Double_t *px, const Double_t */*dummy*/ )
813{
814 // Jpsi pT
6a8b015a 815 // based on: //https://aliceinfo.cern.ch/Notes/node/242, https://aliceinfo.cern.ch/Figure/node/3457, www.sciencedirect.com/science/article/pii/S0370269312011446
816 const static Double_t jpsiPtParam[2][3] = {
817 { 9.686337e-03, 2.629441e-01, 4.552044e+00 }
818 ,{ 3.403549e-03, 2.897061e-01, 3.644278e+00 }
819 };
820 const double pt=px[0]*2.28/2.613;
821 switch(fgSelectedCentrality) {
822 case k0020: return 2.405*PtDoublePowerlaw(&pt,jpsiPtParam[0]); break;
823 case k2040: return 2.405*PtDoublePowerlaw(&pt,jpsiPtParam[1]); break;
824 case k0040: return 0.5*2.405*(PtDoublePowerlaw(&pt,jpsiPtParam[0])+PtDoublePowerlaw(&pt,jpsiPtParam[1])); break;
825 }
826 return 0;
4ae1c9f0 827}
828
829Double_t AliGenEMlib::YJpsi( const Double_t *py, const Double_t */*dummy*/ )
830{
831 return YFlat(*py);
832}
833
834Double_t AliGenEMlib::V2Jpsi( const Double_t *px, const Double_t */*dummy*/ )
835{
1b589c8a 836 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 };
837 switch(fgSelectedCentrality){
838 case k2040: return V2Param(px,v2Param); break;
839 case k0010: return 0.43*V2Param(px,v2Param); break; //V2Pizero(0010)/V2Pizero(2040)=0.43 +-0.025
840 case k1020: return 0.75*V2Param(px,v2Param); break; //V2Pizero(1020)/V2Pizero(2040)=0.75 +-0.04
841 case k0020: return 0.66*V2Param(px,v2Param); break; //V2Pizero(0020)/V2Pizero(2040)=0.66 +-0.035
842 case k0040: return 0.82*V2Param(px,v2Param); break; //V2Pizero(0040)/V2Pizero(2040)=0.82 +-0.05
4ae1c9f0 843 }
1b589c8a 844 return 0;
4ae1c9f0 845}
846
847Double_t AliGenEMlib::YFlat(Double_t /*y*/)
848{
849 //--------------------------------------------------------------------------
850 //
851 // flat rapidity distribution
852 //
853 //--------------------------------------------------------------------------
e40b9538 854
855 Double_t dNdy = 1.;
856
857 return dNdy;
858
859}
860
861//=============================================================
862//
863// Mt-scaling
864//
865//=============================================================
866//
4ae1c9f0 867Double_t AliGenEMlib::MtScal(Double_t pt, Int_t np)
e40b9538 868{
4ae1c9f0 869 // Function for the calculation of the Pt distribution for a
870 // given particle np, from the pizero Pt distribution using
871 // mt scaling.
e40b9538 872
4ae1c9f0 873 Double_t scaledPt = sqrt(pt*pt + fgkHM[np]*fgkHM[np] - fgkHM[0]*fgkHM[0]);
e40b9538 874 Double_t scaledYield = PtPizero(&scaledPt, (Double_t*) 0);
875
4ae1c9f0 876 // VALUE MESON/PI AT 5 GeV/c
877 Double_t NormPt = 5.;
878 Double_t scaledNormPt = sqrt(NormPt*NormPt + fgkHM[np]*fgkHM[np] - fgkHM[0]*fgkHM[0]);
e40b9538 879
4ae1c9f0 880 Double_t norm = fgkMtFactor[int(bool(fgSelectedCentrality))][np] * (PtPizero(&NormPt, (Double_t*) 0) / PtPizero(&scaledNormPt, (Double_t*) 0));
e40b9538 881
882 return norm*(pt/scaledPt)*scaledYield;
883}
884
5a516e0a 885Double_t AliGenEMlib::KEtScal(Double_t pt, Int_t np)
4ae1c9f0 886{
887 const int nq=2; //number of quarks for particle np, here always 2
71443190 888 Double_t scaledPt = sqrt(pow(2.0/nq*(sqrt(pt*pt+fgkHM[np]*fgkHM[np])-fgkHM[np])+fgkHM[0],2)-fgkHM[0]*fgkHM[0]);
71443190 889 return V2Pizero(&scaledPt, (Double_t*) 0);
4ae1c9f0 890}
891
6078e216 892Double_t AliGenEMlib::V2Param(const Double_t *px, const Double_t *par)
893{
894 // Very general parametrization of the v2
895
4ae1c9f0 896 const double &pt=px[0];
897 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]);
1b589c8a 898 double sys=0;
899 if(fgSelectedV2Systematic){
900 double syspt=pt>par[15]?par[15]:pt;
901 sys=fgSelectedV2Systematic*par[11+fgSelectedV2Systematic*2]*pow(syspt,par[12+fgSelectedV2Systematic*2]);
902 }
6a8b015a 903 return std::max(val+sys,0.0);
6078e216 904}
905
906Double_t AliGenEMlib::V2Flat(const Double_t */*px*/, const Double_t */*param*/)
907{
908 // Flat v2
909
71443190 910 return 0.0;
6078e216 911}
912
71443190 913Double_t AliGenEMlib::GetTAA(Int_t cent){
914 const static Double_t taa[16] = { 1.0, // pp
915 26.32, // 0-5
916 20.56, // 5-10
917 14.39, // 10-20
918 8.70, // 20-30
919 5.001, // 30-40
920 2.675, // 40-50
921 1.317, // 50-60
922 23.44, // 0-10
923 6.85, // 20-40
924 1.996, // 40-60
925 0.4174, // 60-80
926 18.91, // 0-20
927 12.88, // 0-40
928 3.088, // 20-80
929 1.207}; // 40-80
930 return taa[cent];
931}
4ae1c9f0 932
e40b9538 933//==========================================================================
934//
935// Set Getters
936//
937//==========================================================================
938
939typedef Double_t (*GenFunc) (const Double_t*, const Double_t*);
940
941typedef Int_t (*GenFuncIp) (TRandom *);
942
943GenFunc AliGenEMlib::GetPt(Int_t param, const char * tname) const
944{
4ae1c9f0 945 // Return pointer to pT parameterisation
e40b9538 946 GenFunc func=0;
947 TString sname(tname);
948
949 switch (param)
950 {
6a8b015a 951 case kDirectRealGamma:
952 func=PtDirectRealGamma;
71443190 953 break;
6a8b015a 954 case kDirectVirtGamma:
955 func=PtDirectVirtGamma;
71443190 956 break;
e40b9538 957 case kPizero:
958 func=PtPizero;
959 break;
960 case kEta:
961 func=PtEta;
962 break;
963 case kRho:
964 func=PtRho;
965 break;
966 case kOmega:
967 func=PtOmega;
968 break;
969 case kEtaprime:
970 func=PtEtaprime;
971 break;
972 case kPhi:
973 func=PtPhi;
974 break;
4ae1c9f0 975 case kJpsi:
976 func=PtJpsi;
977 break;
e40b9538 978
979 default:
980 func=0;
981 printf("<AliGenEMlib::GetPt> unknown parametrisation\n");
982 }
983 return func;
984}
985
986GenFunc AliGenEMlib::GetY(Int_t param, const char * tname) const
987{
4ae1c9f0 988 // Return pointer to y- parameterisation
e40b9538 989 GenFunc func=0;
990 TString sname(tname);
991
992 switch (param)
993 {
6a8b015a 994 case kDirectRealGamma:
995 func=YDirectRealGamma;
71443190 996 break;
6a8b015a 997 case kDirectVirtGamma:
998 func=YDirectVirtGamma;
71443190 999 break;
e40b9538 1000 case kPizero:
1001 func=YPizero;
1002 break;
1003 case kEta:
1004 func=YEta;
1005 break;
1006 case kRho:
1007 func=YRho;
1008 break;
1009 case kOmega:
1010 func=YOmega;
1011 break;
1012 case kEtaprime:
1013 func=YEtaprime;
1014 break;
1015 case kPhi:
1016 func=YPhi;
1017 break;
4ae1c9f0 1018 case kJpsi:
1019 func=YJpsi;
1020 break;
e40b9538 1021
1022 default:
1023 func=0;
1024 printf("<AliGenEMlib::GetY> unknown parametrisation\n");
1025 }
1026 return func;
1027}
1028
1029GenFuncIp AliGenEMlib::GetIp(Int_t param, const char * tname) const
1030{
4ae1c9f0 1031 // Return pointer to particle type parameterisation
e40b9538 1032 GenFuncIp func=0;
1033 TString sname(tname);
1034
1035 switch (param)
1036 {
6a8b015a 1037 case kDirectRealGamma:
1038 func=IpDirectRealGamma;
71443190 1039 break;
6a8b015a 1040 case kDirectVirtGamma:
1041 func=IpDirectVirtGamma;
71443190 1042 break;
e40b9538 1043 case kPizero:
1044 func=IpPizero;
1045 break;
1046 case kEta:
1047 func=IpEta;
1048 break;
1049 case kRho:
1050 func=IpRho;
1051 break;
1052 case kOmega:
1053 func=IpOmega;
1054 break;
1055 case kEtaprime:
1056 func=IpEtaprime;
1057 break;
1058 case kPhi:
1059 func=IpPhi;
1060 break;
4ae1c9f0 1061 case kJpsi:
1062 func=IpJpsi;
1063 break;
e40b9538 1064
1065 default:
1066 func=0;
1067 printf("<AliGenEMlib::GetIp> unknown parametrisation\n");
1068 }
1069 return func;
1070}
1071
6078e216 1072GenFunc AliGenEMlib::GetV2(Int_t param, const char * tname) const
1073{
1074 // Return pointer to v2-parameterisation
1075 GenFunc func=0;
1076 TString sname(tname);
e40b9538 1077
6078e216 1078 switch (param)
1079 {
6a8b015a 1080 case kDirectRealGamma:
1081 func=V2DirectRealGamma;
71443190 1082 break;
6a8b015a 1083 case kDirectVirtGamma:
1084 func=V2DirectVirtGamma;
71443190 1085 break;
6078e216 1086 case kPizero:
1087 func=V2Pizero;
1088 break;
1089 case kEta:
1090 func=V2Eta;
1091 break;
1092 case kRho:
1093 func=V2Pizero;
1094 break;
1095 case kOmega:
1096 func=V2Pizero;
1097 break;
1098 case kEtaprime:
1099 func=V2Pizero;
1100 break;
1101 case kPhi:
1102 func=V2Pizero;
1103 break;
4ae1c9f0 1104 case kJpsi:
1105 func=V2Jpsi;
1106 break;
e40b9538 1107
6078e216 1108 default:
1109 func=0;
1110 printf("<AliGenEMlib::GetV2> unknown parametrisation\n");
1111 }
1112 return func;
1113}
4ae1c9f0 1114