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1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
3 | * * |
4 | * Author: The ALICE Off-line Project. * |
5 | * Contributors are mentioned in the code where appropriate. * |
6 | * * |
7 | * Permission to use, copy, modify and distribute this software and its * |
8 | * documentation strictly for non-commercial purposes is hereby granted * |
9 | * without fee, provided that the above copyright notice appears in all * |
10 | * copies and that both the copyright notice and this permission notice * |
11 | * appear in the supporting documentation. The authors make no claims * |
12 | * about the suitability of this software for any purpose. It is * |
13 | * provided "as is" without express or implied warranty. * |
14 | **************************************************************************/ |
15 | |
16 | /* |
17 | $Log$ |
18 | */ |
19 | |
20 | #include "AliGenMC.h" |
21 | #include "AliPDG.h" |
22 | #include <TParticle.h> |
23 | |
24 | ClassImp(AliGenMC) |
25 | |
26 | AliGenMC::AliGenMC() |
27 | :AliGenerator() |
28 | { |
29 | // Default Constructor |
30 | SetCutOnChild(); |
31 | SetChildMomentumRange(); |
32 | SetChildPtRange(); |
33 | SetChildPhiRange(); |
34 | SetChildThetaRange(); |
35 | SetChildYRange(); |
36 | } |
37 | |
38 | AliGenMC::AliGenMC(Int_t npart) |
39 | :AliGenerator(npart) |
40 | { |
41 | // Constructor |
42 | SetCutOnChild(); |
43 | SetChildMomentumRange(); |
44 | SetChildPtRange(); |
45 | SetChildPhiRange(); |
46 | SetChildThetaRange(); |
47 | SetChildYRange(); |
48 | // |
49 | fParentSelect.Set(8); |
50 | fChildSelect.Set(8); |
51 | for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0; |
52 | } |
53 | |
54 | AliGenMC::AliGenMC(const AliGenMC & mc) |
55 | { |
56 | // copy constructor |
57 | } |
58 | |
59 | AliGenMC::~AliGenMC() |
60 | { |
61 | // Destructor |
62 | } |
63 | |
64 | void AliGenMC::Init() |
65 | { |
66 | // |
67 | // Initialization |
68 | switch (fForceDecay) { |
69 | case kSemiElectronic: |
70 | case kDiElectron: |
71 | case kBJpsiDiElectron: |
72 | case kBPsiPrimeDiElectron: |
73 | fChildSelect[0]=kElectron; |
74 | break; |
75 | case kSemiMuonic: |
76 | case kDiMuon: |
77 | case kBJpsiDiMuon: |
78 | case kBPsiPrimeDiMuon: |
79 | case kPiToMu: |
80 | case kKaToMu: |
81 | fChildSelect[0]=kMuonMinus; |
82 | break; |
83 | case kHadronicD: |
84 | fChildSelect[0]=kPiPlus; |
85 | fChildSelect[1]=kKPlus; |
86 | break; |
87 | case kAll: |
88 | case kNoDecay: |
89 | break; |
90 | } |
91 | } |
92 | |
93 | |
94 | Bool_t AliGenMC::ParentSelected(Int_t ip) |
95 | { |
96 | // True if particle is in list of parent particles to be selected |
97 | for (Int_t i=0; i<8; i++) |
98 | { |
99 | if (fParentSelect[i]==ip) return kTRUE; |
100 | } |
101 | return kFALSE; |
102 | } |
103 | |
104 | Bool_t AliGenMC::ChildSelected(Int_t ip) |
105 | { |
106 | // True if particle is in list of decay products to be selected |
107 | for (Int_t i=0; i<5; i++) |
108 | { |
109 | if (fChildSelect[i]==ip) return kTRUE; |
110 | } |
111 | return kFALSE; |
112 | } |
113 | |
114 | Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) |
115 | { |
116 | // Perform kinematic selection |
117 | Float_t px = particle->Px(); |
118 | Float_t py = particle->Py(); |
119 | Float_t pz = particle->Pz(); |
120 | Float_t e = particle->Energy(); |
121 | Float_t pt = particle->Pt(); |
122 | Float_t p = particle->P(); |
123 | Float_t theta = particle->Theta(); |
124 | Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px))); |
125 | Float_t y; |
126 | |
127 | if ( (e-pz)<=0 || (e+pz)<=0 ) { |
128 | return kFALSE; |
129 | } else { |
130 | y = 0.5*TMath::Log((e+pz)/(e-pz)); |
131 | } |
132 | |
133 | if (flag == 0) { |
134 | // |
135 | // Primary particle cuts |
136 | // |
137 | // transverse momentum cut |
138 | if (pt > fPtMax || pt < fPtMin) { |
139 | // printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax); |
140 | return kFALSE; |
141 | } |
142 | // |
143 | // momentum cut |
144 | if (p > fPMax || p < fPMin) { |
145 | // printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax); |
146 | return kFALSE; |
147 | } |
148 | // |
149 | // theta cut |
150 | if (theta > fThetaMax || theta < fThetaMin) { |
151 | // printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax); |
152 | return kFALSE; |
153 | } |
154 | // |
155 | // rapidity cut |
156 | if (y > fYMax || y < fYMin) { |
157 | // printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax); |
158 | return kFALSE; |
159 | } |
160 | // |
161 | // phi cut |
162 | if (phi > fPhiMax || phi < fPhiMin) { |
163 | // printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax); |
164 | return kFALSE; |
165 | } |
166 | } else { |
167 | // |
168 | // Decay product cuts |
169 | // |
170 | // transverse momentum cut |
171 | if (pt > fChildPtMax || pt < fChildPtMin) { |
172 | // printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax); |
173 | return kFALSE; |
174 | } |
175 | // |
176 | // momentum cut |
177 | if (p > fChildPMax || p < fChildPMin) { |
178 | // printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax); |
179 | return kFALSE; |
180 | } |
181 | // |
182 | // theta cut |
183 | if (theta > fChildThetaMax || theta < fChildThetaMin) { |
184 | // printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax); |
185 | return kFALSE; |
186 | } |
187 | // |
188 | // rapidity cut |
189 | if (y > fChildYMax || y < fChildYMin) { |
190 | // printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax); |
191 | return kFALSE; |
192 | } |
193 | // |
194 | // phi cut |
195 | if (phi > fChildPhiMax || phi < fChildPhiMin) { |
196 | // printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax); |
197 | return kFALSE; |
198 | } |
199 | } |
200 | |
201 | |
202 | |
203 | return kTRUE; |
204 | } |
205 | |
206 | Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) |
207 | { |
208 | // |
209 | // If the particle is in a diffractive state, then take action accordingly |
210 | switch (pdgcode) { |
211 | case 91: |
212 | return 92; |
213 | case 110: |
214 | //rho_diff0 -- difficult to translate, return rho0 |
215 | return 113; |
216 | case 210: |
217 | //pi_diffr+ -- change to pi+ |
218 | return 211; |
219 | case 220: |
220 | //omega_di0 -- change to omega0 |
221 | return 223; |
222 | case 330: |
223 | //phi_diff0 -- return phi0 |
224 | return 333; |
225 | case 440: |
226 | //J/psi_di0 -- return J/psi |
227 | return 443; |
228 | case 2110: |
229 | //n_diffr -- return neutron |
230 | return 2112; |
231 | case 2210: |
232 | //p_diffr+ -- return proton |
233 | return 2212; |
234 | } |
235 | //non diffractive state -- return code unchanged |
236 | return pdgcode; |
237 | } |
238 | |
239 | AliGenMC& AliGenMC::operator=(const AliGenMC& rhs) |
240 | { |
241 | // Assignment operator |
242 | return *this; |
243 | } |
244 | |