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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 | $Log$ |
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18 | Revision 1.1 2001/07/13 10:56:00 morsch |
19 | AliGenMC base class for AliGenParam and AliGenPythia commonalities. |
20 | |
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21 | */ |
22 | |
23 | #include "AliGenMC.h" |
24 | #include "AliPDG.h" |
25 | #include <TParticle.h> |
26 | |
27 | ClassImp(AliGenMC) |
28 | |
29 | AliGenMC::AliGenMC() |
30 | :AliGenerator() |
31 | { |
32 | // Default Constructor |
33 | SetCutOnChild(); |
34 | SetChildMomentumRange(); |
35 | SetChildPtRange(); |
36 | SetChildPhiRange(); |
37 | SetChildThetaRange(); |
38 | SetChildYRange(); |
39 | } |
40 | |
41 | AliGenMC::AliGenMC(Int_t npart) |
42 | :AliGenerator(npart) |
43 | { |
44 | // Constructor |
45 | SetCutOnChild(); |
46 | SetChildMomentumRange(); |
47 | SetChildPtRange(); |
48 | SetChildPhiRange(); |
49 | SetChildThetaRange(); |
50 | SetChildYRange(); |
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51 | SetCutVertexZ(); |
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52 | // |
53 | fParentSelect.Set(8); |
54 | fChildSelect.Set(8); |
55 | for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0; |
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56 | |
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57 | } |
58 | |
59 | AliGenMC::AliGenMC(const AliGenMC & mc) |
60 | { |
61 | // copy constructor |
62 | } |
63 | |
64 | AliGenMC::~AliGenMC() |
65 | { |
66 | // Destructor |
67 | } |
68 | |
69 | void AliGenMC::Init() |
70 | { |
71 | // |
72 | // Initialization |
73 | switch (fForceDecay) { |
74 | case kSemiElectronic: |
75 | case kDiElectron: |
76 | case kBJpsiDiElectron: |
77 | case kBPsiPrimeDiElectron: |
78 | fChildSelect[0]=kElectron; |
79 | break; |
80 | case kSemiMuonic: |
81 | case kDiMuon: |
82 | case kBJpsiDiMuon: |
83 | case kBPsiPrimeDiMuon: |
84 | case kPiToMu: |
85 | case kKaToMu: |
86 | fChildSelect[0]=kMuonMinus; |
87 | break; |
88 | case kHadronicD: |
89 | fChildSelect[0]=kPiPlus; |
90 | fChildSelect[1]=kKPlus; |
91 | break; |
92 | case kAll: |
93 | case kNoDecay: |
94 | break; |
95 | } |
96 | } |
97 | |
98 | |
99 | Bool_t AliGenMC::ParentSelected(Int_t ip) |
100 | { |
101 | // True if particle is in list of parent particles to be selected |
102 | for (Int_t i=0; i<8; i++) |
103 | { |
104 | if (fParentSelect[i]==ip) return kTRUE; |
105 | } |
106 | return kFALSE; |
107 | } |
108 | |
109 | Bool_t AliGenMC::ChildSelected(Int_t ip) |
110 | { |
111 | // True if particle is in list of decay products to be selected |
112 | for (Int_t i=0; i<5; i++) |
113 | { |
114 | if (fChildSelect[i]==ip) return kTRUE; |
115 | } |
116 | return kFALSE; |
117 | } |
118 | |
119 | Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) |
120 | { |
121 | // Perform kinematic selection |
122 | Float_t px = particle->Px(); |
123 | Float_t py = particle->Py(); |
124 | Float_t pz = particle->Pz(); |
125 | Float_t e = particle->Energy(); |
126 | Float_t pt = particle->Pt(); |
127 | Float_t p = particle->P(); |
128 | Float_t theta = particle->Theta(); |
129 | Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px))); |
130 | Float_t y; |
131 | |
132 | if ( (e-pz)<=0 || (e+pz)<=0 ) { |
133 | return kFALSE; |
134 | } else { |
135 | y = 0.5*TMath::Log((e+pz)/(e-pz)); |
136 | } |
137 | |
138 | if (flag == 0) { |
139 | // |
140 | // Primary particle cuts |
141 | // |
142 | // transverse momentum cut |
143 | if (pt > fPtMax || pt < fPtMin) { |
144 | // printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax); |
145 | return kFALSE; |
146 | } |
147 | // |
148 | // momentum cut |
149 | if (p > fPMax || p < fPMin) { |
150 | // printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax); |
151 | return kFALSE; |
152 | } |
153 | // |
154 | // theta cut |
155 | if (theta > fThetaMax || theta < fThetaMin) { |
156 | // printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax); |
157 | return kFALSE; |
158 | } |
159 | // |
160 | // rapidity cut |
161 | if (y > fYMax || y < fYMin) { |
162 | // printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax); |
163 | return kFALSE; |
164 | } |
165 | // |
166 | // phi cut |
167 | if (phi > fPhiMax || phi < fPhiMin) { |
168 | // printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax); |
169 | return kFALSE; |
170 | } |
171 | } else { |
172 | // |
173 | // Decay product cuts |
174 | // |
175 | // transverse momentum cut |
176 | if (pt > fChildPtMax || pt < fChildPtMin) { |
177 | // printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax); |
178 | return kFALSE; |
179 | } |
180 | // |
181 | // momentum cut |
182 | if (p > fChildPMax || p < fChildPMin) { |
183 | // printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax); |
184 | return kFALSE; |
185 | } |
186 | // |
187 | // theta cut |
188 | if (theta > fChildThetaMax || theta < fChildThetaMin) { |
189 | // printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax); |
190 | return kFALSE; |
191 | } |
192 | // |
193 | // rapidity cut |
194 | if (y > fChildYMax || y < fChildYMin) { |
195 | // printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax); |
196 | return kFALSE; |
197 | } |
198 | // |
199 | // phi cut |
200 | if (phi > fChildPhiMax || phi < fChildPhiMin) { |
201 | // printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax); |
202 | return kFALSE; |
203 | } |
204 | } |
205 | |
206 | |
207 | |
208 | return kTRUE; |
209 | } |
210 | |
211 | Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) |
212 | { |
213 | // |
214 | // If the particle is in a diffractive state, then take action accordingly |
215 | switch (pdgcode) { |
216 | case 91: |
217 | return 92; |
218 | case 110: |
219 | //rho_diff0 -- difficult to translate, return rho0 |
220 | return 113; |
221 | case 210: |
222 | //pi_diffr+ -- change to pi+ |
223 | return 211; |
224 | case 220: |
225 | //omega_di0 -- change to omega0 |
226 | return 223; |
227 | case 330: |
228 | //phi_diff0 -- return phi0 |
229 | return 333; |
230 | case 440: |
231 | //J/psi_di0 -- return J/psi |
232 | return 443; |
233 | case 2110: |
234 | //n_diffr -- return neutron |
235 | return 2112; |
236 | case 2210: |
237 | //p_diffr+ -- return proton |
238 | return 2212; |
239 | } |
240 | //non diffractive state -- return code unchanged |
241 | return pdgcode; |
242 | } |
243 | |
244 | AliGenMC& AliGenMC::operator=(const AliGenMC& rhs) |
245 | { |
246 | // Assignment operator |
247 | return *this; |
248 | } |
249 | |