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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 1.3 2001/10/16 08:48:56 morsch |
19 | Common vertex related code moved to base class AliGenerator. |
20 | |
b80a8e41 |
21 | Revision 1.2 2001/10/15 08:15:51 morsch |
22 | Event vertex and vertex truncation setting moved into AliMC. |
23 | |
dba8ac91 |
24 | Revision 1.1 2001/07/13 10:56:00 morsch |
25 | AliGenMC base class for AliGenParam and AliGenPythia commonalities. |
26 | |
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27 | */ |
28 | |
29 | #include "AliGenMC.h" |
30 | #include "AliPDG.h" |
31 | #include <TParticle.h> |
32 | |
33 | ClassImp(AliGenMC) |
34 | |
35 | AliGenMC::AliGenMC() |
36 | :AliGenerator() |
37 | { |
38 | // Default Constructor |
39 | SetCutOnChild(); |
40 | SetChildMomentumRange(); |
41 | SetChildPtRange(); |
42 | SetChildPhiRange(); |
43 | SetChildThetaRange(); |
44 | SetChildYRange(); |
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45 | SetMaximumLifetime(); |
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46 | } |
47 | |
48 | AliGenMC::AliGenMC(Int_t npart) |
49 | :AliGenerator(npart) |
50 | { |
51 | // Constructor |
52 | SetCutOnChild(); |
53 | SetChildMomentumRange(); |
54 | SetChildPtRange(); |
55 | SetChildPhiRange(); |
56 | SetChildThetaRange(); |
57 | SetChildYRange(); |
58 | // |
59 | fParentSelect.Set(8); |
60 | fChildSelect.Set(8); |
61 | for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0; |
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62 | SetMaximumLifetime(); |
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63 | } |
64 | |
65 | AliGenMC::AliGenMC(const AliGenMC & mc) |
66 | { |
67 | // copy constructor |
68 | } |
69 | |
70 | AliGenMC::~AliGenMC() |
71 | { |
72 | // Destructor |
73 | } |
74 | |
75 | void AliGenMC::Init() |
76 | { |
77 | // |
78 | // Initialization |
79 | switch (fForceDecay) { |
80 | case kSemiElectronic: |
81 | case kDiElectron: |
82 | case kBJpsiDiElectron: |
83 | case kBPsiPrimeDiElectron: |
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84 | fChildSelect[0] = kElectron; |
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85 | break; |
86 | case kSemiMuonic: |
87 | case kDiMuon: |
88 | case kBJpsiDiMuon: |
89 | case kBPsiPrimeDiMuon: |
90 | case kPiToMu: |
91 | case kKaToMu: |
92 | fChildSelect[0]=kMuonMinus; |
93 | break; |
94 | case kHadronicD: |
95 | fChildSelect[0]=kPiPlus; |
96 | fChildSelect[1]=kKPlus; |
97 | break; |
98 | case kAll: |
99 | case kNoDecay: |
100 | break; |
101 | } |
102 | } |
103 | |
104 | |
105 | Bool_t AliGenMC::ParentSelected(Int_t ip) |
106 | { |
107 | // True if particle is in list of parent particles to be selected |
108 | for (Int_t i=0; i<8; i++) |
109 | { |
110 | if (fParentSelect[i]==ip) return kTRUE; |
111 | } |
112 | return kFALSE; |
113 | } |
114 | |
115 | Bool_t AliGenMC::ChildSelected(Int_t ip) |
116 | { |
117 | // True if particle is in list of decay products to be selected |
118 | for (Int_t i=0; i<5; i++) |
119 | { |
120 | if (fChildSelect[i]==ip) return kTRUE; |
121 | } |
122 | return kFALSE; |
123 | } |
124 | |
125 | Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) |
126 | { |
127 | // Perform kinematic selection |
128 | Float_t px = particle->Px(); |
129 | Float_t py = particle->Py(); |
130 | Float_t pz = particle->Pz(); |
131 | Float_t e = particle->Energy(); |
132 | Float_t pt = particle->Pt(); |
133 | Float_t p = particle->P(); |
134 | Float_t theta = particle->Theta(); |
135 | Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px))); |
136 | Float_t y; |
137 | |
138 | if ( (e-pz)<=0 || (e+pz)<=0 ) { |
139 | return kFALSE; |
140 | } else { |
141 | y = 0.5*TMath::Log((e+pz)/(e-pz)); |
142 | } |
143 | |
144 | if (flag == 0) { |
145 | // |
146 | // Primary particle cuts |
147 | // |
148 | // transverse momentum cut |
149 | if (pt > fPtMax || pt < fPtMin) { |
150 | // printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax); |
151 | return kFALSE; |
152 | } |
153 | // |
154 | // momentum cut |
155 | if (p > fPMax || p < fPMin) { |
156 | // printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax); |
157 | return kFALSE; |
158 | } |
159 | // |
160 | // theta cut |
161 | if (theta > fThetaMax || theta < fThetaMin) { |
162 | // printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax); |
163 | return kFALSE; |
164 | } |
165 | // |
166 | // rapidity cut |
167 | if (y > fYMax || y < fYMin) { |
168 | // printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax); |
169 | return kFALSE; |
170 | } |
171 | // |
172 | // phi cut |
173 | if (phi > fPhiMax || phi < fPhiMin) { |
174 | // printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax); |
175 | return kFALSE; |
176 | } |
177 | } else { |
178 | // |
179 | // Decay product cuts |
180 | // |
181 | // transverse momentum cut |
182 | if (pt > fChildPtMax || pt < fChildPtMin) { |
183 | // printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax); |
184 | return kFALSE; |
185 | } |
186 | // |
187 | // momentum cut |
188 | if (p > fChildPMax || p < fChildPMin) { |
189 | // printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax); |
190 | return kFALSE; |
191 | } |
192 | // |
193 | // theta cut |
194 | if (theta > fChildThetaMax || theta < fChildThetaMin) { |
195 | // printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax); |
196 | return kFALSE; |
197 | } |
198 | // |
199 | // rapidity cut |
200 | if (y > fChildYMax || y < fChildYMin) { |
201 | // printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax); |
202 | return kFALSE; |
203 | } |
204 | // |
205 | // phi cut |
206 | if (phi > fChildPhiMax || phi < fChildPhiMin) { |
207 | // printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax); |
208 | return kFALSE; |
209 | } |
210 | } |
211 | |
212 | |
213 | |
214 | return kTRUE; |
215 | } |
216 | |
217 | Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) |
218 | { |
219 | // |
220 | // If the particle is in a diffractive state, then take action accordingly |
221 | switch (pdgcode) { |
222 | case 91: |
223 | return 92; |
224 | case 110: |
225 | //rho_diff0 -- difficult to translate, return rho0 |
226 | return 113; |
227 | case 210: |
228 | //pi_diffr+ -- change to pi+ |
229 | return 211; |
230 | case 220: |
231 | //omega_di0 -- change to omega0 |
232 | return 223; |
233 | case 330: |
234 | //phi_diff0 -- return phi0 |
235 | return 333; |
236 | case 440: |
237 | //J/psi_di0 -- return J/psi |
238 | return 443; |
239 | case 2110: |
240 | //n_diffr -- return neutron |
241 | return 2112; |
242 | case 2210: |
243 | //p_diffr+ -- return proton |
244 | return 2212; |
245 | } |
246 | //non diffractive state -- return code unchanged |
247 | return pdgcode; |
248 | } |
249 | |
250 | AliGenMC& AliGenMC::operator=(const AliGenMC& rhs) |
251 | { |
252 | // Assignment operator |
253 | return *this; |
254 | } |
255 | |