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3decf5cb | 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 | ||
b2a60966 | 16 | /* $Id$ */ |
17 | ||
3decf5cb | 18 | //_________________________________________________________________________ |
b2a60966 | 19 | // Implementation of the PHOS manager class for fast simulations |
20 | // Tracks particles until the reach a grossly designed PHOS module | |
21 | // Modify the particles property (momentum, energy, type) according to | |
22 | // the PHOS response function. The result is called a virtual reconstructed | |
23 | // particle. | |
24 | // | |
25 | //*-- Author: Yves Schutz (SUBATECH) | |
3decf5cb | 26 | |
27 | // --- ROOT system --- | |
3a4295ee | 28 | |
3decf5cb | 29 | #include "TBRIK.h" |
30 | #include "TNode.h" | |
31 | #include "TParticle.h" | |
3a4295ee | 32 | #include "TTree.h" |
33 | #include "TGeometry.h" | |
34 | #include "TFile.h" | |
3decf5cb | 35 | |
36 | // --- Standard library --- | |
37 | ||
de9ec31b | 38 | #include <stdio.h> |
3decf5cb | 39 | |
40 | // --- AliRoot header files --- | |
3a4295ee | 41 | #include "AliPHOSFastRecParticle.h" |
42 | #include "AliPHOSGeometry.h" | |
3decf5cb | 43 | #include "AliPHOSvFast.h" |
3a4295ee | 44 | #include "AliPHOSGetter.h" |
3decf5cb | 45 | #include "AliRun.h" |
46 | #include "AliConst.h" | |
3a4295ee | 47 | #include "AliMC.h" |
3decf5cb | 48 | |
49 | ClassImp(AliPHOSvFast) | |
50 | ||
51 | //____________________________________________________________________________ | |
3a4295ee | 52 | AliPHOSvFast::AliPHOSvFast() : AliPHOS() |
3decf5cb | 53 | { |
3a4295ee | 54 | // default ctor : initialize data member |
55 | fBigBoxX = 0. ; | |
56 | fBigBoxY = 0. ; | |
57 | fBigBoxZ = 0. ; | |
58 | fFastRecParticles = 0 ; | |
59 | fNRecParticles = 0 ; | |
60 | fRan = 0 ; | |
61 | fResPara1 = 0. ; | |
62 | fResPara2 = 0. ; | |
63 | fResPara3 = 0. ; | |
64 | fPosParaA0 = 0. ; | |
65 | fPosParaA1 = 0. ; | |
66 | fPosParaB0 = 0. ; | |
67 | fPosParaB1 = 0. ; | |
68 | fPosParaB2 = 0. ; | |
b2a60966 | 69 | |
3decf5cb | 70 | } |
71 | ||
72 | //____________________________________________________________________________ | |
73 | AliPHOSvFast::AliPHOSvFast(const char *name, const char *title): | |
74 | AliPHOS(name,title) | |
75 | { | |
b2a60966 | 76 | // ctor |
77 | ||
3decf5cb | 78 | |
7a9d98f9 | 79 | // create the Getter |
80 | AliPHOSGetter::GetInstance(gDirectory->GetName(), 0) ; | |
81 | ||
82 | SetBigBox(0, GetGeometry()->GetOuterBoxSize(0) ) ; | |
83 | SetBigBox(1, GetGeometry()->GetOuterBoxSize(3) + GetGeometry()->GetCPVBoxSize(1) ) ; | |
84 | SetBigBox(2, GetGeometry()->GetOuterBoxSize(2) ); | |
85 | ||
86 | fNRecParticles = 0 ; | |
87 | fFastRecParticles = new AliPHOSFastRecParticle::FastRecParticlesList("AliPHOSFastRecParticle", 100) ; | |
88 | ||
89 | fResPara1 = 0.030 ; // GeV | |
90 | fResPara2 = 0.00003 ; | |
91 | fResPara3 = 0.00001 ; | |
92 | ||
93 | fPosParaA0 = 2.87 ; // mm | |
94 | fPosParaA1 = -0.0975 ; | |
95 | fPosParaB0 = 0.257 ; | |
96 | fPosParaB1 = 0.137 ; | |
97 | fPosParaB2 = 0.00619 ; | |
3decf5cb | 98 | } |
99 | ||
100 | //____________________________________________________________________________ | |
101 | AliPHOSvFast::~AliPHOSvFast() | |
102 | { | |
b2a60966 | 103 | // dtor |
3decf5cb | 104 | |
a73f33f0 | 105 | fFastRecParticles->Delete() ; |
106 | delete fFastRecParticles ; | |
107 | fFastRecParticles = 0 ; | |
3decf5cb | 108 | |
109 | } | |
110 | ||
111 | //____________________________________________________________________________ | |
a73f33f0 | 112 | void AliPHOSvFast::AddRecParticle(const AliPHOSFastRecParticle & rp) |
113 | { | |
b2a60966 | 114 | // Add a virtually reconstructed particle to the list |
115 | ||
f96d3dc7 | 116 | new( (*fFastRecParticles)[fNRecParticles] ) AliPHOSFastRecParticle(rp) ; |
117 | fNRecParticles++ ; | |
3decf5cb | 118 | } |
119 | ||
120 | //____________________________________________________________________________ | |
121 | void AliPHOSvFast::BuildGeometry() | |
122 | { | |
3decf5cb | 123 | // Build the PHOS geometry for the ROOT display |
b2a60966 | 124 | //BEGIN_HTML |
125 | /* | |
126 | <H2> | |
127 | PHOS FAST in ALICE displayed by root | |
128 | </H2> | |
129 | <H4> All Views </H4> | |
130 | <P> | |
131 | <CENTER> | |
132 | <IMG Align=BOTTOM ALT="Fast All Views" SRC="../images/AliPHOSvFastAllViews.gif"> | |
133 | </CENTER></P> | |
134 | <H4> Front View </H4> | |
135 | <P> | |
136 | <CENTER> | |
137 | <IMG Align=BOTTOM ALT="Fast Front View" SRC="../images/AliPHOSvFastFrontView.gif"> | |
138 | </CENTER></P> | |
139 | */ | |
140 | //END_HTML | |
141 | ||
3decf5cb | 142 | const Int_t kColorPHOS = kRed ; |
143 | ||
144 | Double_t const kRADDEG = 180.0 / kPI ; | |
145 | ||
146 | new TBRIK( "BigBox", "PHOS box", "void", GetBigBox(0)/2, | |
147 | GetBigBox(1)/2, | |
148 | GetBigBox(2)/2 ); | |
149 | ||
150 | // position PHOS into ALICE | |
151 | ||
fa7cce36 | 152 | Float_t r = GetGeometry()->GetIPtoCrystalSurface() + GetBigBox(1) / 2.0 ; |
3decf5cb | 153 | Int_t number = 988 ; |
fa7cce36 | 154 | Float_t pphi = TMath::ATan( GetBigBox(0) / ( 2.0 * GetGeometry()->GetIPtoCrystalSurface() ) ) ; |
3decf5cb | 155 | pphi *= kRADDEG ; |
156 | TNode * top = gAlice->GetGeometry()->GetNode("alice") ; | |
157 | ||
158 | char * nodename = new char[20] ; | |
159 | char * rotname = new char[20] ; | |
160 | ||
fa7cce36 | 161 | for( Int_t i = 1; i <= GetGeometry()->GetNModules(); i++ ) { |
162 | Float_t angle = pphi * 2 * ( i - GetGeometry()->GetNModules() / 2.0 - 0.5 ) ; | |
3decf5cb | 163 | sprintf(rotname, "%s%d", "rot", number++) ; |
164 | new TRotMatrix(rotname, rotname, 90, angle, 90, 90 + angle, 0, 0); | |
165 | top->cd(); | |
166 | sprintf(nodename,"%s%d", "Module", i) ; | |
167 | Float_t x = r * TMath::Sin( angle / kRADDEG ) ; | |
168 | Float_t y = -r * TMath::Cos( angle / kRADDEG ) ; | |
169 | TNode * bigboxnode = new TNode(nodename, nodename, "BigBox", x, y, 0, rotname ) ; | |
170 | bigboxnode->SetLineColor(kColorPHOS) ; | |
171 | fNodes->Add(bigboxnode) ; | |
172 | } | |
173 | delete[] nodename ; | |
174 | delete[] rotname ; | |
175 | } | |
176 | ||
177 | //____________________________________________________________________________ | |
178 | void AliPHOSvFast::CreateGeometry() | |
179 | { | |
b2a60966 | 180 | // Create the geometry for GEANT |
181 | ||
3decf5cb | 182 | AliPHOSvFast *phostmp = (AliPHOSvFast*)gAlice->GetModule("PHOS") ; |
b2a60966 | 183 | |
3decf5cb | 184 | if ( phostmp == NULL ) { |
185 | ||
186 | fprintf(stderr, "PHOS detector not found!\n") ; | |
187 | return ; | |
188 | ||
189 | } | |
190 | ||
191 | // Get pointer to the array containing media indeces | |
192 | Int_t *idtmed = fIdtmed->GetArray() - 699 ; | |
193 | ||
194 | Float_t bigbox[3] ; | |
195 | bigbox[0] = GetBigBox(0) / 2.0 ; | |
196 | bigbox[1] = GetBigBox(1) / 2.0 ; | |
197 | bigbox[2] = GetBigBox(2) / 2.0 ; | |
198 | ||
199 | gMC->Gsvolu("PHOS", "BOX ", idtmed[798], bigbox, 3) ; | |
200 | ||
201 | // --- Position PHOS mdules in ALICE setup --- | |
202 | ||
203 | Int_t idrotm[99] ; | |
204 | Double_t const kRADDEG = 180.0 / kPI ; | |
205 | ||
fa7cce36 | 206 | for( Int_t i = 1; i <= GetGeometry()->GetNModules(); i++ ) { |
3decf5cb | 207 | |
fa7cce36 | 208 | Float_t angle = GetGeometry()->GetPHOSAngle(i) ; |
3decf5cb | 209 | AliMatrix(idrotm[i-1], 90.0, angle, 90.0, 90.0+angle, 0.0, 0.0) ; |
210 | ||
fa7cce36 | 211 | Float_t r = GetGeometry()->GetIPtoCrystalSurface() + GetBigBox(1) / 2.0 ; |
3decf5cb | 212 | |
213 | Float_t xP1 = r * TMath::Sin( angle / kRADDEG ) ; | |
214 | Float_t yP1 = -r * TMath::Cos( angle / kRADDEG ) ; | |
3decf5cb | 215 | gMC->Gspos("PHOS", i, "ALIC", xP1, yP1, 0.0, idrotm[i-1], "ONLY") ; |
216 | ||
217 | } // for GetNModules | |
218 | ||
219 | } | |
220 | ||
221 | ||
222 | //____________________________________________________________________________ | |
223 | void AliPHOSvFast::Init(void) | |
224 | { | |
b2a60966 | 225 | // Prints out an information message |
226 | ||
3decf5cb | 227 | Int_t i; |
228 | ||
229 | printf("\n"); | |
230 | for(i=0;i<35;i++) printf("*"); | |
231 | printf(" FAST PHOS_INIT "); | |
232 | for(i=0;i<35;i++) printf("*"); | |
233 | printf("\n"); | |
234 | ||
235 | // Here the PHOS initialisation code (if any!) | |
236 | ||
237 | for(i=0;i<80;i++) printf("*"); | |
238 | printf("\n"); | |
239 | ||
240 | } | |
241 | ||
242 | //___________________________________________________________________________ | |
3a4295ee | 243 | Float_t AliPHOSvFast::GetBigBox(Int_t index) const |
3decf5cb | 244 | { |
b2a60966 | 245 | // Get the X, Y or Z dimension of the box describing a PHOS module |
246 | ||
3decf5cb | 247 | Float_t rv = 0 ; |
248 | ||
249 | switch (index) { | |
250 | case 0: | |
251 | rv = fBigBoxX ; | |
252 | break ; | |
253 | case 1: | |
254 | rv = fBigBoxY ; | |
255 | break ; | |
256 | case 2: | |
257 | rv = fBigBoxZ ; | |
258 | break ; | |
259 | } | |
260 | return rv ; | |
261 | } | |
262 | ||
263 | //___________________________________________________________________________ | |
9e1a0ddb | 264 | void AliPHOSvFast::MakeBranch(Option_t* opt, const char *file) |
3decf5cb | 265 | { |
b2a60966 | 266 | // Create new branch in the current reconstructed Root Tree |
f96d3dc7 | 267 | |
2ab0c725 | 268 | AliDetector::MakeBranch(opt,file) ; |
3decf5cb | 269 | |
270 | char branchname[10]; | |
271 | sprintf(branchname,"%s",GetName()); | |
3a4295ee | 272 | const char *cd = strstr(opt,"R"); |
3decf5cb | 273 | |
a73f33f0 | 274 | if (fFastRecParticles && gAlice->TreeR() && cd) { |
9e1a0ddb | 275 | MakeBranchInTree(gAlice->TreeR(), |
276 | branchname, &fFastRecParticles, fBufferSize, file); | |
3decf5cb | 277 | } |
278 | } | |
279 | ||
a73f33f0 | 280 | //____________________________________________________________________________ |
281 | Double_t AliPHOSvFast::MakeEnergy(const Double_t energy) | |
282 | { | |
b2a60966 | 283 | // Smears the energy according to the energy dependent energy resolution. |
284 | // A gaussian distribution is assumed | |
285 | ||
b1aa729d | 286 | Double_t sigma = SigmaE(energy) ; |
287 | return fRan.Gaus(energy, sigma) ; | |
a73f33f0 | 288 | } |
289 | ||
290 | //____________________________________________________________________________ | |
b1aa729d | 291 | TVector3 AliPHOSvFast::MakePosition(const Double_t energy, const TVector3 pos, const Double_t theta, const Double_t phi) |
a73f33f0 | 292 | { |
b2a60966 | 293 | // Smears the impact position according to the energy dependent position resolution |
294 | // A gaussian position distribution is assumed | |
295 | ||
b1aa729d | 296 | TVector3 newpos ; |
297 | Double_t sigma = SigmaP( energy, theta*180./TMath::Pi() ) ; | |
298 | Double_t x = fRan.Gaus( pos.X(), sigma ) ; | |
299 | sigma = SigmaP( energy, phi*180./TMath::Pi() ) ; | |
300 | Double_t z = fRan.Gaus( pos.Z(), sigma ) ; | |
301 | Double_t y = pos.Y() ; | |
302 | ||
303 | newpos.SetX(x) ; | |
304 | newpos.SetY(y) ; | |
305 | newpos.SetZ(z) ; | |
306 | ||
307 | return newpos ; | |
308 | } | |
a73f33f0 | 309 | |
b1aa729d | 310 | //____________________________________________________________________________ |
311 | void AliPHOSvFast::MakeRecParticle(const Int_t modid, const TVector3 pos, AliPHOSFastRecParticle & rp) | |
312 | { | |
b2a60966 | 313 | // Modify the primary particle properties according |
314 | // 1. the response function of PHOS | |
315 | // 2. the performance of the EMC+PPSD setup | |
316 | ||
b1aa729d | 317 | Int_t type = MakeType( rp ) ; |
a73f33f0 | 318 | rp.SetType(type) ; |
319 | ||
320 | ||
321 | // get the detected energy | |
322 | ||
323 | TLorentzVector momentum ; | |
324 | rp.Momentum(momentum) ; | |
325 | Double_t kineticenergy = TMath::Sqrt( TMath::Power(momentum.E(), 2) - TMath::Power(rp.GetMass(), 2) ) ; | |
326 | Double_t modifiedkineticenergy = MakeEnergy(kineticenergy ) ; | |
b1aa729d | 327 | Double_t modifiedenergy = TMath::Sqrt( TMath::Power(modifiedkineticenergy, 2) |
328 | + TMath::Power( rp.GetMass(), 2) ) ; | |
329 | ||
330 | // get the angle of incidence | |
331 | ||
332 | Double_t incidencetheta = 90. * TMath::Pi() /180 - rp.Theta() ; | |
fa7cce36 | 333 | Double_t incidencephi = ( 270 + GetGeometry()->GetPHOSAngle(modid) ) * TMath::Pi() / 180. - rp.Phi() ; |
b1aa729d | 334 | |
335 | // get the detected direction | |
336 | ||
337 | TVector3 modifiedposition = MakePosition(kineticenergy, pos, incidencetheta, incidencephi) ; | |
338 | modifiedposition *= modifiedkineticenergy / modifiedposition.Mag() ; | |
339 | ||
340 | // Set the modified 4-momentum of the reconstructed particle | |
341 | ||
342 | rp.SetMomentum(modifiedposition.X(), modifiedposition.Y(), modifiedposition.Z(), modifiedenergy) ; | |
343 | ||
a73f33f0 | 344 | } |
345 | ||
346 | //____________________________________________________________________________ | |
b1aa729d | 347 | Int_t AliPHOSvFast::MakeType(AliPHOSFastRecParticle & rp ) |
a73f33f0 | 348 | { |
b2a60966 | 349 | // Generate a particle type using the performance of the EMC+PPSD setup |
350 | ||
9ec91567 | 351 | Int_t rv = AliPHOSFastRecParticle::kUNDEFINED ; |
b1aa729d | 352 | Int_t charge = (Int_t)rp.GetPDG()->Charge() ; |
353 | Int_t test ; | |
354 | Float_t ran ; | |
f96d3dc7 | 355 | if ( charge != 0 && ( TMath::Abs(rp.GetPdgCode()) != 11 ) ) |
b1aa729d | 356 | test = - 1 ; |
357 | else | |
358 | test = rp.GetPdgCode() ; | |
359 | ||
3a4295ee | 360 | cout << " SHOULD NOT BE USED until values of probabilities are properly set " << endl ; |
361 | assert(1==0) ; // NB: ALL VALUES SHOLD BE CHECKED !!!! | |
b1aa729d | 362 | switch (test) { |
363 | ||
3a4295ee | 364 | case 22: // it's a photon // NB: ALL VALUES SHOLD BE CHECKED !!!! |
b1aa729d | 365 | ran = fRan.Rndm() ; |
3a4295ee | 366 | if( ran <= 0.9498 ) |
367 | rv = AliPHOSFastRecParticle::kNEUTRALHAFAST ; | |
368 | else | |
369 | rv = AliPHOSFastRecParticle::kNEUTRALEMFAST ; | |
b1aa729d | 370 | break ; |
371 | ||
372 | case 2112: // it's a neutron | |
373 | ran = fRan.Rndm() ; | |
374 | if ( ran <= 0.9998 ) | |
3a4295ee | 375 | rv = AliPHOSFastRecParticle::kNEUTRALHASLOW ; |
b1aa729d | 376 | else |
3a4295ee | 377 | rv = AliPHOSFastRecParticle::kNEUTRALEMSLOW ; |
b1aa729d | 378 | break ; |
3a4295ee | 379 | |
b1aa729d | 380 | case -2112: // it's a anti-neutron |
381 | ran = fRan.Rndm() ; | |
382 | if ( ran <= 0.9984 ) | |
3a4295ee | 383 | rv = AliPHOSFastRecParticle::kNEUTRALHASLOW ; |
b1aa729d | 384 | else |
3a4295ee | 385 | rv = AliPHOSFastRecParticle::kNEUTRALEMSLOW ; |
b1aa729d | 386 | break ; |
387 | ||
388 | case 11: // it's a electron | |
389 | ran = fRan.Rndm() ; | |
390 | if ( ran <= 0.9996 ) | |
3a4295ee | 391 | rv = AliPHOSFastRecParticle::kCHARGEDEMFAST ; |
b1aa729d | 392 | else |
3a4295ee | 393 | rv = AliPHOSFastRecParticle::kCHARGEDHAFAST ; |
b1aa729d | 394 | break; |
395 | ||
f96d3dc7 | 396 | case -11: // it's a positon |
b1aa729d | 397 | ran = fRan.Rndm() ; |
398 | if ( ran <= 0.9996 ) | |
3a4295ee | 399 | rv = AliPHOSFastRecParticle::kCHARGEDEMFAST ; |
b1aa729d | 400 | else |
3a4295ee | 401 | rv = AliPHOSFastRecParticle::kCHARGEDHAFAST ; |
b1aa729d | 402 | break; |
403 | ||
404 | case -1: // it's a charged | |
405 | ran = fRan.Rndm() ; | |
406 | if ( ran <= 0.9996 ) | |
3a4295ee | 407 | rv = AliPHOSFastRecParticle::kCHARGEDHAFAST ; |
b1aa729d | 408 | else |
3a4295ee | 409 | rv = AliPHOSFastRecParticle::kNEUTRALHAFAST ; |
b1aa729d | 410 | |
411 | break ; | |
412 | } | |
413 | ||
414 | ||
a73f33f0 | 415 | return rv ; |
416 | } | |
417 | ||
f96d3dc7 | 418 | //___________________________________________________________________________ |
419 | void AliPHOSvFast::ResetPoints() | |
420 | { | |
b2a60966 | 421 | // This overloads the method in AliDetector |
422 | ||
f96d3dc7 | 423 | ResetFastRecParticles() ; |
424 | } | |
425 | ||
426 | //___________________________________________________________________________ | |
427 | void AliPHOSvFast::ResetFastRecParticles() | |
428 | { | |
b2a60966 | 429 | // Resets the list of virtual reconstructed particles |
430 | ||
f96d3dc7 | 431 | if (fFastRecParticles) |
432 | fFastRecParticles->Clear() ; | |
433 | fNRecParticles = 0 ; | |
434 | } | |
435 | ||
3decf5cb | 436 | //___________________________________________________________________________ |
437 | void AliPHOSvFast::SetBigBox(Int_t index, Float_t value) | |
438 | { | |
b2a60966 | 439 | // Set the size of the Box describing a PHOS module |
440 | ||
3decf5cb | 441 | switch (index) { |
442 | case 0: | |
443 | fBigBoxX = value ; | |
444 | break ; | |
445 | case 1: | |
446 | fBigBoxY = value ; | |
447 | break ; | |
448 | case 2: | |
449 | fBigBoxZ = value ; | |
450 | break ; | |
451 | } | |
452 | ||
453 | } | |
454 | ||
a73f33f0 | 455 | //____________________________________________________________________________ |
456 | Double_t AliPHOSvFast::SigmaE(Double_t energy) | |
457 | { | |
b2a60966 | 458 | // Calculates the energy dependent energy resolution |
459 | ||
a73f33f0 | 460 | Double_t rv = -1 ; |
461 | ||
462 | rv = TMath::Sqrt( TMath::Power(fResPara1/energy, 2) | |
463 | + TMath::Power(fResPara2/TMath::Sqrt(energy), 2) | |
464 | + TMath::Power(fResPara3, 2) ) ; | |
465 | ||
466 | return rv * energy ; | |
467 | } | |
468 | ||
b1aa729d | 469 | //____________________________________________________________________________ |
7a9d98f9 | 470 | Double_t AliPHOSvFast::SigmaP(Double_t energy, Double_t incidence) |
b1aa729d | 471 | { |
b2a60966 | 472 | // Calculates the energy dependent position resolution |
473 | ||
b1aa729d | 474 | Double_t paraA = fPosParaA0 + fPosParaA1 * incidence ; |
475 | Double_t paraB = fPosParaB0 + fPosParaB1 * incidence + fPosParaB2 * incidence * incidence ; | |
476 | ||
477 | return ( paraA / TMath::Sqrt(energy) + paraB ) * 0.1 ; // in cm | |
478 | } | |
479 | ||
3decf5cb | 480 | //____________________________________________________________________________ |
481 | void AliPHOSvFast::StepManager(void) | |
482 | { | |
b2a60966 | 483 | // Only verifies if the particle reaches PHOS and stops the tracking |
3a4295ee | 484 | |
3decf5cb | 485 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
3a4295ee | 486 | |
a73f33f0 | 487 | TLorentzVector lv ; |
488 | gMC->TrackPosition(lv) ; | |
b1aa729d | 489 | TVector3 pos = lv.Vect() ; |
490 | Int_t modid ; | |
491 | gMC->CurrentVolID(modid); | |
a73f33f0 | 492 | |
3a4295ee | 493 | Float_t energy = gMC->Etot() ; //Total energy of current track |
3decf5cb | 494 | |
3a4295ee | 495 | //Calculating mass of current particle |
496 | TDatabasePDG * pdg = TDatabasePDG::Instance() ; | |
497 | TParticlePDG * partPDG = pdg->GetParticle(gMC->TrackPid()) ; | |
498 | Float_t mass = partPDG->Mass() ; | |
a73f33f0 | 499 | |
3a4295ee | 500 | if(energy > mass){ |
501 | pos.SetMag(TMath::Sqrt(energy*energy-mass*mass)) ; | |
502 | TLorentzVector pTrack(pos, energy) ; | |
a73f33f0 | 503 | |
3a4295ee | 504 | TParticle * part = new TParticle(gMC->TrackPid(), 0,-1,-1,-1,-1, pTrack, lv) ; |
505 | ||
506 | AliPHOSFastRecParticle rp(*part) ; | |
507 | rp.SetPrimary(primary) ; | |
b1aa729d | 508 | |
3a4295ee | 509 | // Adds the response of PHOS to the particle |
510 | MakeRecParticle(modid, pos, rp) ; | |
511 | ||
512 | // add the `track' particle to the FastRecParticles list | |
b1aa729d | 513 | |
3a4295ee | 514 | AddRecParticle(rp) ; |
a73f33f0 | 515 | |
3a4295ee | 516 | part->Delete() ; |
517 | } | |
a73f33f0 | 518 | // stop the track as soon PHOS is reached |
b1aa729d | 519 | |
3decf5cb | 520 | gMC->StopTrack() ; |
521 | ||
522 | } | |
523 |