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Fixes for pA indenfication of events
[u/mrichter/AliRoot.git] / PWGLF / FORWARD / analysis2 / AliFMDMCEventInspector.cxx
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e1f47419 1//
2// This class inspects the event
3//
4// Input:
5// - AliESDFMD object possibly corrected for sharing
6//
7// Output:
8// - A histogram of v_z of events with triggers.
9// - A histogram of v_z of events with vertex and triggers
10// - A histogram of trigger counters
11//
12// Note, that these are added to the master output list
13//
14// Corrections used:
15// - None
16//
17#include "AliFMDMCEventInspector.h"
18#include "AliLog.h"
19#include "AliAODForwardMult.h"
20#include "AliForwardUtil.h"
21#include "AliCentrality.h"
22#include "AliESDEvent.h"
23#include "AliMCEvent.h"
1f480471 24#include "AliStack.h"
e1f47419 25#include "AliGenPythiaEventHeader.h"
26#include "AliGenDPMjetEventHeader.h"
27#include "AliGenHijingEventHeader.h"
28// #include "AliGenHydjetEventHeader.h"
29#include "AliGenEposEventHeader.h"
30#include "AliGenHerwigEventHeader.h"
31#include "AliGenGeVSimEventHeader.h"
2d2513f0 32#include "AliAnalysisManager.h"
33#include "AliMCEventHandler.h"
e1f47419 34#include "AliHeader.h"
35#include <TList.h>
e308a636 36#include <TH2F.h>
1f480471 37#include <TParticle.h>
38#include <TMath.h>
e308a636 39
e1f47419 40//====================================================================
41AliFMDMCEventInspector::AliFMDMCEventInspector()
42 : AliFMDEventInspector(),
43 fHVertex(0),
44 fHPhiR(0),
e308a636 45 fHB(0),
46 fHBvsPart(0),
47 fHBvsBin(0),
48 fHBvsCent(0),
49 fHVzComp(0),
50 fHCentVsPart(0),
f7cfc454 51 fHCentVsBin(0),
52 fProduction("")
e1f47419 53{
54 //
55 // Constructor
56 //
57}
58
59//____________________________________________________________________
60AliFMDMCEventInspector::AliFMDMCEventInspector(const char* /* name */)
61 : AliFMDEventInspector("fmdEventInspector"),
62 fHVertex(0),
63 fHPhiR(0),
e308a636 64 fHB(0),
65 fHBvsPart(0),
66 fHBvsBin(0),
67 fHBvsCent(0),
68 fHVzComp(0),
69 fHCentVsPart(0),
f7cfc454 70 fHCentVsBin(0),
71 fProduction("")
e1f47419 72{
73 //
74 // Constructor
75 //
76 // Parameters:
77 // name Name of object
78 //
79}
80
81//____________________________________________________________________
82AliFMDMCEventInspector::AliFMDMCEventInspector(const AliFMDMCEventInspector& o)
83 : AliFMDEventInspector(o),
84 fHVertex(0),
85 fHPhiR(0),
e308a636 86 fHB(0),
87 fHBvsPart(0),
88 fHBvsBin(0),
89 fHBvsCent(0),
90 fHVzComp(0),
91 fHCentVsPart(0),
f7cfc454 92 fHCentVsBin(0),
93 fProduction("")
e1f47419 94{
95 //
96 // Copy constructor
97 //
98 // Parameters:
99 // o Object to copy from
100 //
101}
102
103//____________________________________________________________________
104AliFMDMCEventInspector::~AliFMDMCEventInspector()
105{
106 //
107 // Destructor
108 //
109}
110//____________________________________________________________________
111AliFMDMCEventInspector&
112AliFMDMCEventInspector::operator=(const AliFMDMCEventInspector& o)
113{
114 //
115 // Assignement operator
116 //
117 // Parameters:
118 // o Object to assign from
119 //
120 // Return:
121 // Reference to this object
122 //
123 AliFMDEventInspector::operator=(o);
124 return *this;
125}
126
127//____________________________________________________________________
128void
129AliFMDMCEventInspector::Init(const TAxis& vtxAxis)
130{
131 //
132 // Initialize the object
133 //
134 // Parameters:
135 // vtxAxis Vertex axis in use
136 //
137 AliFMDEventInspector::Init(vtxAxis);
138
e308a636 139 Int_t maxPart = 450;
140 Int_t maxBin = 225;
141 Int_t maxB = 25;
142 Int_t nVtx = vtxAxis.GetNbins();
143 Double_t lVtx = vtxAxis.GetXmin();
144 Double_t hVtx = vtxAxis.GetXmax();
145 fHVertex = new TH1F("vertex", "True vertex distribution", nVtx, lVtx, hVtx);
e1f47419 146 fHVertex->SetXTitle("v_{z} [cm]");
147 fHVertex->SetYTitle("# of events");
148 fHVertex->SetFillColor(kGreen+1);
149 fHVertex->SetFillStyle(3001);
150 fHVertex->SetDirectory(0);
151 // fHVertex->Sumw2();
152 fList->Add(fHVertex);
153
154 fHPhiR = new TH1F("phiR", "Event plane", 120, 0, 2*TMath::Pi());
155 fHPhiR->SetXTitle("#Phi_{R} [radians]");
156 fHPhiR->SetYTitle("# of events");
157 fHPhiR->SetFillColor(kGreen+1);
158 fHPhiR->SetFillStyle(3001);
159 fHPhiR->SetDirectory(0);
160 fList->Add(fHPhiR);
161
e308a636 162 fHB = new TH1F("b", "Impact parameter", 5*maxB, 0, maxB);
e1f47419 163 fHB->SetXTitle("b [fm]");
164 fHB->SetYTitle("# of events");
165 fHB->SetFillColor(kGreen+1);
166 fHB->SetFillStyle(3001);
167 fHB->SetDirectory(0);
168 fList->Add(fHB);
e308a636 169
170 fHBvsPart = new TH2F("bVsParticipants", "Impact parameter vs Participants",
171 5*maxB, 0, maxB, maxPart, -.5, maxPart-.5);
172 fHBvsPart->SetXTitle("b [fm]");
173 fHBvsPart->SetYTitle("# of participants");
174 fHBvsPart->SetZTitle("Events");
175 fHBvsPart->SetDirectory(0);
176 fList->Add(fHBvsPart);
177
178 fHBvsBin = new TH2F("bVsBinary", "Impact parameter vs Binary Collisions",
179 5*maxB, 0, maxB, maxBin, -.5, maxBin-.5);
180 fHBvsBin->SetXTitle("b [fm]");
181 fHBvsBin->SetYTitle("# of binary collisions");
182 fHBvsBin->SetZTitle("Events");
183 fHBvsBin->SetDirectory(0);
184 fList->Add(fHBvsBin);
e1f47419 185
e308a636 186 fHBvsCent = new TH2F("bVsCentrality", "Impact parameter vs Centrality",
187 5*maxB, 0, maxB, fCentAxis->GetNbins(),
188 fCentAxis->GetXbins()->GetArray());
189 fHBvsCent->SetXTitle("b [fm]");
190 fHBvsCent->SetYTitle("Centrality [%]");
191 fHBvsCent->SetZTitle("Event");
192 fHBvsCent->SetDirectory(0);
193 fList->Add(fHBvsCent);
194
195
196 fHVzComp = new TH2F("vzComparison", "v_{z} truth vs reconstructed",
197 10*nVtx, lVtx, hVtx, 10*nVtx, lVtx, hVtx);
198 fHVzComp->SetXTitle("True v_{z} [cm]");
199 fHVzComp->SetYTitle("Reconstructed v_{z} [cm]");
200 fHVzComp->SetZTitle("Events");
201 fHVzComp->SetDirectory(0);
202 fList->Add(fHVzComp);
203
204 fHCentVsPart = new TH2F("centralityVsParticipans",
205 "# of participants vs Centrality",
206 maxPart, -.5, maxPart-.5, fCentAxis->GetNbins(),
207 fCentAxis->GetXbins()->GetArray());
208 fHCentVsPart->SetXTitle("Participants");
209 fHCentVsPart->SetYTitle("Centrality [%]");
210 fHCentVsPart->SetZTitle("Event");
211 fHCentVsPart->SetDirectory(0);
212 fList->Add(fHCentVsPart);
213
214 fHCentVsBin = new TH2F("centralityVsBinary",
215 "# of binary collisions vs Centrality",
216 maxBin, -.5, maxBin-.5, fCentAxis->GetNbins(),
217 fCentAxis->GetXbins()->GetArray());
218 fHCentVsBin->SetXTitle("Binary collisions");
219 fHCentVsBin->SetYTitle("Centrality [%]");
220 fHCentVsBin->SetZTitle("Event");
221 fHCentVsBin->SetDirectory(0);
222 fList->Add(fHCentVsBin);
e1f47419 223}
224
f7cfc454 225//____________________________________________________________________
226void
9b2f2e39 227AliFMDMCEventInspector::StoreInformation(Int_t runNo)
f7cfc454 228{
229 // Store information about running conditions in the output list
230 if (!fList) return;
9b2f2e39 231 AliFMDEventInspector::StoreInformation(runNo);
f7cfc454 232 TNamed* mc = new TNamed("mc", fProduction.Data());
233 mc->SetUniqueID(1);
234 fList->Add(mc);
235}
236
237namespace
238{
239 TString& AppendField(TString& s, bool test, const char* f)
240 {
241 if (!test) return s;
242 if (!s.IsNull()) s.Append(",");
243 s.Append(f);
244 return s;
245 }
246}
247
248//____________________________________________________________________
249void
250AliFMDMCEventInspector::ReadProductionDetails(AliMCEvent* event)
251{
252 //Assign MC only triggers : True NSD etc.
253 AliHeader* header = event->Header();
254 AliGenEventHeader* genHeader = header->GenEventHeader();
255 AliCollisionGeometry* colGeometry =
256 dynamic_cast<AliCollisionGeometry*>(genHeader);
257 AliGenPythiaEventHeader* pythiaHeader =
258 dynamic_cast<AliGenPythiaEventHeader*>(genHeader);
259 AliGenDPMjetEventHeader* dpmHeader =
260 dynamic_cast<AliGenDPMjetEventHeader*>(genHeader);
261 AliGenGeVSimEventHeader* gevHeader =
262 dynamic_cast<AliGenGeVSimEventHeader*>(genHeader);
263 AliGenHerwigEventHeader* herwigHeader =
264 dynamic_cast<AliGenHerwigEventHeader*>(genHeader);
265 AliGenHijingEventHeader* hijingHeader =
266 dynamic_cast<AliGenHijingEventHeader*>(genHeader);
267 // AliGenHydjetEventHeader* hydjetHeader =
268 // dynamic_cast<AliGenHydjetEventHeader*>(genHeader);
269 AliGenEposEventHeader* eposHeader =
270 dynamic_cast<AliGenEposEventHeader*>(genHeader);
271
272 AppendField(fProduction, colGeometry, "Geometry");
273 AppendField(fProduction, pythiaHeader, "Pythia");
274 AppendField(fProduction, dpmHeader, "DPM");
275 AppendField(fProduction, gevHeader, "GevSim");
276 AppendField(fProduction, herwigHeader, "Herwig");
277 AppendField(fProduction, hijingHeader, "Hijing");
278 // AppendField(fProduction, hydjetHeader, "Hydjet");
279 AppendField(fProduction, eposHeader, "EPOS");
280}
281
e1f47419 282//____________________________________________________________________
283UInt_t
284AliFMDMCEventInspector::ProcessMC(AliMCEvent* event,
285 UInt_t& triggers,
286 UShort_t& ivz,
287 Double_t& vz,
288 Double_t& b,
241cca4d 289 Double_t& c,
e308a636 290 Int_t& npart,
291 Int_t& nbin,
e1f47419 292 Double_t& phiR)
293{
294 //
295 // Process the event
296 //
297 // Parameters:
298 // event Input event
299 // triggers On return, the triggers fired
300 // ivz On return, the found vertex bin (1-based). A zero
301 // means outside of the defined vertex range
302 // vz On return, the z position of the interaction
303 // b On return, the impact parameter - < 0 if not available
241cca4d 304 // c On return, centrality estimate - < 0 if not available
e1f47419 305 // phiR On return, the event plane angle - < 0 if not available
306 //
307 // Return:
308 // 0 (or kOk) on success, otherwise a bit mask of error codes
309 //
310
311 // Check that we have an event
312 if (!event) {
313 AliWarning("No MC event found for input event");
314 return kNoEvent;
315 }
316
317 //Assign MC only triggers : True NSD etc.
318 AliHeader* header = event->Header();
319 AliGenEventHeader* genHeader = header->GenEventHeader();
e308a636 320 AliCollisionGeometry* colGeometry =
321 dynamic_cast<AliCollisionGeometry*>(genHeader);
e1f47419 322 AliGenPythiaEventHeader* pythiaHeader =
323 dynamic_cast<AliGenPythiaEventHeader*>(genHeader);
324 AliGenDPMjetEventHeader* dpmHeader =
325 dynamic_cast<AliGenDPMjetEventHeader*>(genHeader);
326 AliGenGeVSimEventHeader* gevHeader =
327 dynamic_cast<AliGenGeVSimEventHeader*>(genHeader);
e1f47419 328 AliGenHerwigEventHeader* herwigHeader =
329 dynamic_cast<AliGenHerwigEventHeader*>(genHeader);
e308a636 330 // AliGenHijingEventHeader* hijingHeader =
331 // dynamic_cast<AliGenHijingEventHeader*>(genHeader);
e1f47419 332 // AliGenHydjetEventHeader* hydjetHeader =
333 // dynamic_cast<AliGenHydjetEventHeader*>(genHeader);
e308a636 334 // AliGenEposEventHeader* eposHeader =
335 // dynamic_cast<AliGenEposEventHeader*>(genHeader);
e1f47419 336
337 // Check if this is a single diffractive event
e308a636 338 Bool_t sd = kFALSE;
339 Double_t phi = -1111;
340 npart = 0;
341 nbin = 0;
342 b = -1;
241cca4d 343 c = -1;
e308a636 344 if (colGeometry) {
345 b = colGeometry->ImpactParameter();
346 phi = colGeometry->ReactionPlaneAngle();
347 npart = (colGeometry->ProjectileParticipants() +
348 colGeometry->TargetParticipants());
349 nbin = colGeometry->NN();
350 }
d4d486f8 351 if (fDebug && !colGeometry) {
352 AliWarningF("Collision header of class %s is not a CollisionHeader",
353 genHeader->ClassName());
354 }
355
e1f47419 356 if(pythiaHeader) {
357 Int_t pythiaType = pythiaHeader->ProcessType();
1f480471 358 // 92 and 93 are SD
359 // 94 is DD
e1f47419 360 if (pythiaType==92 || pythiaType==93) sd = kTRUE;
e308a636 361 b = pythiaHeader->GetImpactParameter();
362 npart = 2; // Always 2 protons
363 nbin = 1; // Always 1 binary collision
e1f47419 364 }
241cca4d 365 if (b >= 0) {
366 if (b < 3.5) c = 2.5; //0-5%
367 else if (b < 4.95) c = 7.5; //5-10%
368 else if (b < 6.98) c = 15; //10-20%
369 else if (b < 8.55) c = 25; //20-30%
370 else if (b < 9.88) c = 35; //30-40%
371 else if (b < 11.04) c = 45; //40-50%
372 else c = 55; //50-60%
373 }
e308a636 374 if(dpmHeader) { // Also an AliCollisionGeometry
e1f47419 375 Int_t processType = dpmHeader->ProcessType();
1f480471 376 // 1 & 4 are ND
377 // 5 & 6 are SD
378 // 7 is DD
e1f47419 379 if (processType == 5 || processType == 6) sd = kTRUE;
e1f47419 380 }
381 if (gevHeader) {
382 phi = gevHeader->GetEventPlane();
383 }
e1f47419 384 if (herwigHeader) {
385 Int_t processType = herwigHeader->ProcessType();
386 // This is a guess
387 if (processType == 5 || processType == 6) sd = kTRUE;
e308a636 388 npart = 2; // Always 2 protons
389 nbin = 1; // Always 1 binary collision
e1f47419 390 }
e308a636 391 // if (hijingHeader) {
392 // b = hijingHeader->ImpactParameter();
393 // phi = hijingHeader->ReactionPlaneAngle();
394 // }
e1f47419 395 // if (hydjetHeader) {
396 // b = hydjetHeader->ImpactParameter();
397 // phi = hydjetHeader->ReactionPlaneAngle();
398 // }
e308a636 399 // if (eposHeader) {
400 // b = eposHeader->ImpactParameter();
401 // phi = eposHeader->ReactionPlaneAngle();
402 // }
e1f47419 403
404 // Normalize event plane angle to [0,2pi]
405 if (phi <= -1111) phiR = -1;
406 else {
407 while (true) {
408 if (phi < 0) phi += 2*TMath::Pi();
409 else if (phi > 2*TMath::Pi()) phi -= 2*TMath::Pi();
410 else break;
411 }
412 }
413
1f480471 414 // Do a check on particles
415 sd = IsSingleDiffractive(event->Stack());
416
e1f47419 417 // Set NSD flag
418 if(!sd) {
419 triggers |= AliAODForwardMult::kMCNSD;
420 fHTriggers->Fill(kMCNSD+0.5);
421 }
422
423 // Get the primary vertex from EG
424 TArrayF vtx;
425 genHeader->PrimaryVertex(vtx);
426 vz = vtx[2];
427
d4d486f8 428 if (fDebug) {
429 AliInfoF("vz=%f, phiR=%f, b=%f, npart=%d, nbin=%d",
430 vz, phiR, b, npart, nbin);
431 }
e1f47419 432 fHVertex->Fill(vz);
433 fHPhiR->Fill(phiR);
434 fHB->Fill(b);
e308a636 435 fHBvsPart->Fill(b, npart);
436 fHBvsBin->Fill(b, nbin);
e1f47419 437
241cca4d 438 if(fUseDisplacedVertices) {
439 // Put the vertex at fixed locations
440 Double_t zvtx = vz;
441 Double_t ratio = zvtx/37.5;
442 if(ratio > 0) ratio = ratio + 0.5;
443 if(ratio < 0) ratio = ratio - 0.5;
444 Int_t ratioInt = Int_t(ratio);
445 zvtx = 37.5*((Double_t)ratioInt);
446 if(TMath::Abs(zvtx) > 999)
447 return kBadVertex;
448 }
449
e1f47419 450 // Check for the vertex bin
d2286e26 451 ivz = fVtxAxis.FindBin(vz);
e1f47419 452 if (ivz <= 0 || ivz > fHEventsTr->GetXaxis()->GetNbins()) {
453 if (fDebug > 3) {
454 AliWarning(Form("Vertex @ %f outside of range [%f,%f]",
d2286e26 455 vz, fVtxAxis.GetXmin(), fVtxAxis.GetXmax())); }
e1f47419 456 ivz = 0;
457 return kBadVertex;
458 }
459
460
461 return kOk;
462}
1f480471 463
464//____________________________________________________________________
465namespace {
466 Double_t rapidity(TParticle* p, Double_t mass)
467 {
468 Double_t pt = p->Pt();
469 Double_t pz = p->Pz();
470 Double_t ee = TMath::Sqrt(pt*pt+pz*pz+mass*mass);
471 if (TMath::Abs(ee - TMath::Abs(pz)) < 1e-9) return TMath::Sign(1e30, pz);
472 return .5 * TMath::Log((ee + pz) / (ee - pz));
473 }
474}
475
476//____________________________________________________________________
477Bool_t
478AliFMDMCEventInspector::IsSingleDiffractive(AliStack* stack,
479 Double_t xiMin,
480 Double_t xiMax) const
481{
482 // Re-implementation of AliPWG0Helper::IsHadronLevelSingleDiffrative
483 //
484 // This is re-implemented here to be indendent of the PWG0 library.
485 TParticle* p1 = 0; // Particle with least y
486 TParticle* p2 = 0; // Particle with largest y
487 Double_t y1 = 1e10; // y of p1
488 Double_t y2 = -1e10; // y of p2
489
490 // Loop over primaries
491 for (Int_t i = 0; i < stack->GetNprimary(); i++) {
492 TParticle* p = stack->Particle(i);
493 if (!p) continue;
494
495 Int_t pdg = TMath::Abs(p->GetPdgCode());
496 Int_t c1 = p->GetFirstDaughter();
497 Int_t s = p->GetStatusCode();
498 Int_t mfl = Int_t(pdg/TMath::Power(10,Int_t(TMath::Log10(pdg))));
499
500 // Select final state charm and beauty
501 if (c1 > -1 || s != 1) mfl = 0;
502
503 // Check if this is a primary, pi0, Sigma0, ???, or most
504 // significant digit is larger than or equal to 4
505 if (!(stack->IsPhysicalPrimary(i) ||
506 pdg == 111 ||
507 pdg == 3212 ||
508 pdg == 3124 ||
509 mfl >= 4)) continue;
510
511 Int_t m1 = p->GetFirstMother();
512 if (m1 > 0) {
513 TParticle* pm1 = stack->Particle(m1);
514 Int_t mpdg = TMath::Abs(pm1->GetPdgCode());
515 // Check if mother is a p0, Simga0, or ???
516 if (mpdg == 111 || mpdg == 3124 || mpdg == 3212) continue;
517 }
518
519 // Calculate the rapidity of the particle
520 Double_t mm = (pdg != 3124 ? p->GetMass() : 1.5195);
521 Double_t yy = rapidity(p, mm);
522
523 // Check if the rapidity of this particle is further out than any
524 // of the preceding particles
525 if (yy < y1) {
526 y1 = yy;
527 p1 = p;
528 }
529 if (yy > y2) {
530 y2 = yy;
531 p2 = p;
532 }
533 }
534 if (!p1 || !p2) return false;
535
536 // Calculate rapidities assuming protons
537 y1 = TMath::Abs(rapidity(p1, 0.938));
538 y2 = TMath::Abs(rapidity(p2, 0.938));
539
540 // Check if both or just one is a proton
541 Int_t pdg1 = p1->GetPdgCode();
542 Int_t pdg2 = p2->GetPdgCode();
543 Int_t arm = -99999;
544 if (pdg1 == 2212 && pdg2 == 2212)
545 arm = (y1 > y2 ? 0 : 1);
546 else if (pdg1 == 2212)
547 arm = 0;
548 else if (pdg2 == 2212)
549 arm = 1;
550 else
551 return false;
552
5bb5d1f6 553 // Rapidity shift
d4d486f8 554 Double_t m02s = (fEnergy > 0 ? 1 - 2 * p1->Energy() / fEnergy : 0);
555 Double_t m12s = (fEnergy > 0 ? 1 - 2 * p2->Energy() / fEnergy : 0);
1f480471 556
557 if (arm == 0 && m02s > xiMin && m02s < xiMax) return true;
558 if (arm == 1 && m12s > xiMin && m12s < xiMax) return true;
559
560 return false;
561}
e1f47419 562
e308a636 563//____________________________________________________________________
564Bool_t
565AliFMDMCEventInspector::CompareResults(Double_t vz, Double_t trueVz,
566 Double_t cent, Double_t b,
567 Int_t npart, Int_t nbin)
568{
569 fHVzComp->Fill(trueVz, vz);
570 fHBvsCent->Fill(b, cent);
571 fHCentVsPart->Fill(npart, cent);
572 fHCentVsBin->Fill(nbin, cent);
573
574 return true;
575}
e1f47419 576//
577// EOF
578//
579