Using ios or ios_base with different compilers
[u/mrichter/AliRoot.git] / EVGEN / AliGenMC.cxx
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e36044d6 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$Log$
027677ae 18Revision 1.10 2002/06/05 14:05:46 morsch
19Decayer option kPhiKK for forced phi->K+K- decay added.
20
00cb2f27 21Revision 1.9 2002/05/30 14:58:29 morsch
22Add pointer to AliGeometry to handle geometrical acceptance. (G. MArtinez)
23
65de9f86 24Revision 1.8 2002/04/26 10:42:35 morsch
25Case kNoDecayHeavy added. (N. Carrer)
26
d5f86442 27Revision 1.7 2002/04/17 10:32:32 morsch
28Coding Rule violations corrected.
29
62d0ae06 30Revision 1.6 2002/03/26 14:19:36 morsch
31Saver calculation of rapdity.
32
fef61e14 33Revision 1.5 2002/03/12 17:02:20 morsch
34Change in calculation of rapidity, include case in which numerically e == pz.
35
95450c6d 36Revision 1.4 2001/11/27 13:13:07 morsch
37Maximum lifetime for long-lived particles to be put on the stack is parameter.
38It can be set via SetMaximumLifetime(..).
39
47fc6bd5 40Revision 1.3 2001/10/16 08:48:56 morsch
41Common vertex related code moved to base class AliGenerator.
42
b80a8e41 43Revision 1.2 2001/10/15 08:15:51 morsch
44Event vertex and vertex truncation setting moved into AliMC.
45
dba8ac91 46Revision 1.1 2001/07/13 10:56:00 morsch
47AliGenMC base class for AliGenParam and AliGenPythia commonalities.
48
e36044d6 49*/
50
62d0ae06 51// Base class for generators using external MC generators.
52// For example AliGenPythia using Pythia.
53// Provides basic functionality: setting of kinematic cuts on
54// decay products and particle selection.
55// andreas.morsch@cern.ch
56
e36044d6 57#include "AliGenMC.h"
58#include "AliPDG.h"
65de9f86 59#include <TMath.h>
e36044d6 60#include <TParticle.h>
61
62 ClassImp(AliGenMC)
63
64AliGenMC::AliGenMC()
65 :AliGenerator()
66{
67// Default Constructor
68 SetCutOnChild();
69 SetChildMomentumRange();
70 SetChildPtRange();
71 SetChildPhiRange();
72 SetChildThetaRange();
73 SetChildYRange();
47fc6bd5 74 SetMaximumLifetime();
65de9f86 75 SetGeometryAcceptance();
76 SetPdgCodeParticleforAcceptanceCut();
77 SetNumberOfAcceptedParticles();
e36044d6 78}
79
80AliGenMC::AliGenMC(Int_t npart)
81 :AliGenerator(npart)
82{
83// Constructor
84 SetCutOnChild();
85 SetChildMomentumRange();
86 SetChildPtRange();
87 SetChildPhiRange();
88 SetChildThetaRange();
89 SetChildYRange();
90//
91 fParentSelect.Set(8);
92 fChildSelect.Set(8);
93 for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
47fc6bd5 94 SetMaximumLifetime();
65de9f86 95 SetGeometryAcceptance();
96 SetPdgCodeParticleforAcceptanceCut();
97 SetNumberOfAcceptedParticles();
e36044d6 98}
99
100AliGenMC::AliGenMC(const AliGenMC & mc)
101{
102// copy constructor
103}
104
105AliGenMC::~AliGenMC()
106{
107// Destructor
108}
109
110void AliGenMC::Init()
111{
112//
113// Initialization
114 switch (fForceDecay) {
115 case kSemiElectronic:
116 case kDiElectron:
117 case kBJpsiDiElectron:
118 case kBPsiPrimeDiElectron:
47fc6bd5 119 fChildSelect[0] = kElectron;
e36044d6 120 break;
121 case kSemiMuonic:
122 case kDiMuon:
123 case kBJpsiDiMuon:
124 case kBPsiPrimeDiMuon:
125 case kPiToMu:
126 case kKaToMu:
127 fChildSelect[0]=kMuonMinus;
128 break;
129 case kHadronicD:
130 fChildSelect[0]=kPiPlus;
131 fChildSelect[1]=kKPlus;
132 break;
00cb2f27 133 case kPhiKK:
027677ae 134 fChildSelect[0]=kKPlus;
62d0ae06 135 case kOmega:
e36044d6 136 case kAll:
137 case kNoDecay:
d5f86442 138 case kNoDecayHeavy:
e36044d6 139 break;
140 }
141}
142
143
62d0ae06 144Bool_t AliGenMC::ParentSelected(Int_t ip) const
e36044d6 145{
146// True if particle is in list of parent particles to be selected
147 for (Int_t i=0; i<8; i++)
148 {
62d0ae06 149 if (fParentSelect.At(i) == ip) return kTRUE;
e36044d6 150 }
151 return kFALSE;
152}
153
62d0ae06 154Bool_t AliGenMC::ChildSelected(Int_t ip) const
e36044d6 155{
156// True if particle is in list of decay products to be selected
157 for (Int_t i=0; i<5; i++)
158 {
62d0ae06 159 if (fChildSelect.At(i) == ip) return kTRUE;
e36044d6 160 }
161 return kFALSE;
162}
163
62d0ae06 164Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) const
e36044d6 165{
166// Perform kinematic selection
167 Float_t px = particle->Px();
168 Float_t py = particle->Py();
169 Float_t pz = particle->Pz();
170 Float_t e = particle->Energy();
171 Float_t pt = particle->Pt();
172 Float_t p = particle->P();
173 Float_t theta = particle->Theta();
95450c6d 174 Float_t mass = particle->GetMass();
175 Float_t mt2 = pt * pt + mass * mass;
176
e36044d6 177 Float_t phi = Float_t(TMath::ATan2(Double_t(py),Double_t(px)));
95450c6d 178 Double_t y, y0;
179
fef61e14 180 if (TMath::Abs(pz) < e) {
95450c6d 181 y = 0.5*TMath::Log((e+pz)/(e-pz));
182 } else {
183 y = 1.e10;
184 }
e36044d6 185
95450c6d 186 if (mt2) {
187 y0 = 0.5*TMath::Log((e+TMath::Abs(pz))*(e+TMath::Abs(pz))/mt2);
e36044d6 188 } else {
95450c6d 189 if (TMath::Abs(y) < 1.e10) {
190 y0 = y;
191 } else {
192 y0 = 1.e10;
193 }
e36044d6 194 }
95450c6d 195
196 y = (pz < 0) ? -y0 : y0;
e36044d6 197
198 if (flag == 0) {
199//
200// Primary particle cuts
201//
202// transverse momentum cut
203 if (pt > fPtMax || pt < fPtMin) {
204// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
205 return kFALSE;
206 }
207//
208// momentum cut
209 if (p > fPMax || p < fPMin) {
210// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
211 return kFALSE;
212 }
213//
214// theta cut
215 if (theta > fThetaMax || theta < fThetaMin) {
216// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
217 return kFALSE;
218 }
219//
220// rapidity cut
221 if (y > fYMax || y < fYMin) {
222// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
223 return kFALSE;
224 }
225//
226// phi cut
227 if (phi > fPhiMax || phi < fPhiMin) {
228// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
229 return kFALSE;
230 }
231 } else {
232//
233// Decay product cuts
234//
235// transverse momentum cut
236 if (pt > fChildPtMax || pt < fChildPtMin) {
237// printf("\n failed pt cut %f %f %f \n",pt,fChildPtMin,fChildPtMax);
238 return kFALSE;
239 }
240//
241// momentum cut
242 if (p > fChildPMax || p < fChildPMin) {
243// printf("\n failed p cut %f %f %f \n",p,fChildPMin,fChildPMax);
244 return kFALSE;
245 }
246//
247// theta cut
248 if (theta > fChildThetaMax || theta < fChildThetaMin) {
249// printf("\n failed theta cut %f %f %f \n",theta,fChildThetaMin,fChildThetaMax);
250 return kFALSE;
251 }
252//
253// rapidity cut
254 if (y > fChildYMax || y < fChildYMin) {
255// printf("\n failed y cut %f %f %f \n",y,fChildYMin,fChildYMax);
256 return kFALSE;
257 }
258//
259// phi cut
260 if (phi > fChildPhiMax || phi < fChildPhiMin) {
261// printf("\n failed phi cut %f %f %f \n",phi,fChildPhiMin,fChildPhiMax);
262 return kFALSE;
263 }
264 }
265
e36044d6 266 return kTRUE;
267}
268
65de9f86 269Bool_t AliGenMC::CheckAcceptanceGeometry(Int_t np, TClonesArray* particles)
270{
271 Bool_t Check ; // All fPdgCodeParticleforAcceptanceCut particles are in in the fGeometryAcceptance acceptance
272 Int_t NumberOfPdgCodeParticleforAcceptanceCut=0;
273 Int_t NumberOfAcceptedPdgCodeParticleforAcceptanceCut=0;
274 TParticle * particle;
275 Int_t i;
276 for (i=0; i<np; i++) {
277 particle = (TParticle *) particles->At(i);
278 if( TMath::Abs( particle->GetPdgCode() ) == TMath::Abs( fPdgCodeParticleforAcceptanceCut ) ) {
279 NumberOfPdgCodeParticleforAcceptanceCut++;
280 if (fGeometryAcceptance->Impact(particle)) NumberOfAcceptedPdgCodeParticleforAcceptanceCut++;
281 }
282 }
283 if ( NumberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
284 Check = kTRUE;
285 else
286 Check = kFALSE;
287
288 return Check;
289}
290
62d0ae06 291Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) const
e36044d6 292{
293//
294// If the particle is in a diffractive state, then take action accordingly
295 switch (pdgcode) {
296 case 91:
297 return 92;
298 case 110:
299 //rho_diff0 -- difficult to translate, return rho0
300 return 113;
301 case 210:
302 //pi_diffr+ -- change to pi+
303 return 211;
304 case 220:
305 //omega_di0 -- change to omega0
306 return 223;
307 case 330:
308 //phi_diff0 -- return phi0
309 return 333;
310 case 440:
311 //J/psi_di0 -- return J/psi
312 return 443;
313 case 2110:
314 //n_diffr -- return neutron
315 return 2112;
316 case 2210:
317 //p_diffr+ -- return proton
318 return 2212;
319 }
320 //non diffractive state -- return code unchanged
321 return pdgcode;
322}
323
324AliGenMC& AliGenMC::operator=(const AliGenMC& rhs)
325{
326// Assignment operator
327 return *this;
328}
329