1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 //The design of this class is based on the AliFMDParameters class. Its purpose
17 //is to hold parameters for the analysis such as background correction and
20 //Author: Hans Hjersing Dalsgaard, NBI, hans.dalsgaard@cern.ch
23 #include "AliFMDDebug.h" // ALILOG_H
24 #include "AliFMDAnaParameters.h" // ALIFMDPARAMETERS_H
25 //#include <AliCDBManager.h> // ALICDBMANAGER_H
26 //#include <AliCDBEntry.h> // ALICDBMANAGER_H
27 //#include "AliFMDRing.h"
29 #include <Riostream.h>
35 #include "AliTriggerAnalysis.h"
36 #include "AliPhysicsSelection.h"
37 #include "AliBackgroundSelection.h"
38 #include "AliMultiplicity.h"
39 #include "AliESDEvent.h"
40 #include "AliESDVertex.h"
42 //====================================================================
43 ClassImp(AliFMDAnaParameters)
45 ; // This is here to keep Emacs for indenting the next line
48 //const char* AliFMDAnaParameters::fgkBackgroundCorrection = "FMD/Correction/Background";
49 //const char* AliFMDAnaParameters::fgkEnergyDists = "FMD/Correction/EnergyDistribution";
50 const char* AliFMDAnaParameters::fgkBackgroundID = "background";
51 const char* AliFMDAnaParameters::fgkEnergyDistributionID = "energydistributions";
52 const char* AliFMDAnaParameters::fgkEventSelectionEffID = "eventselectionefficiency";
53 const char* AliFMDAnaParameters::fgkSharingEffID = "sharingefficiency";
54 //____________________________________________________________________
55 AliFMDAnaParameters* AliFMDAnaParameters::fgInstance = 0;
57 //____________________________________________________________________
60 AliFMDAnaParameters::Instance()
62 // Get static instance
63 if (!fgInstance) fgInstance = new AliFMDAnaParameters;
67 //____________________________________________________________________
68 AliFMDAnaParameters::AliFMDAnaParameters() :
71 fEnergyDistribution(0),
72 fEventSelectionEfficiency(0),
73 fSharingEfficiency(0),
74 fCorner1(4.2231, 26.6638),
75 fCorner2(1.8357, 27.9500),
76 fEnergyPath("$ALICE_ROOT/PWG2/FORWARD/corrections/EnergyDistribution"),
77 fBackgroundPath("$ALICE_ROOT/PWG2/FORWARD/corrections/Background"),
78 fEventSelectionEffPath("$ALICE_ROOT/PWG2/FORWARD/corrections/EventSelectionEfficiency"),
79 fSharingEffPath("$ALICE_ROOT/PWG2/FORWARD/corrections/SharingEfficiency"),
80 fProcessPrimary(kFALSE),
89 fSPDhighLimit(999999999),
90 fCentralSelection(kFALSE),
91 fSharingObjectPresent(kTRUE),
92 fNumberOfEtaBinsToCut(1)
94 // Default constructor
95 fPhysicsSelection = new AliPhysicsSelection;
96 AliBackgroundSelection* backgroundSelection = new AliBackgroundSelection("bg","bg");
98 fPhysicsSelection->AddBackgroundIdentification(backgroundSelection);
99 //fPhysicsSelection->Initialize(104792);
100 // Do not use this - it is only for IO
104 //____________________________________________________________________
105 char* AliFMDAnaParameters::GetPath(const char* species) {
109 if(species == fgkBackgroundID)
110 path = Form("%s/%s_%d_%d_%d_%d_%d_%d.root",
111 fBackgroundPath.Data(),
119 if(species == fgkEnergyDistributionID)
120 path = Form("%s/%s_%d_%d_%d_%d_%d_%d.root",
122 fgkEnergyDistributionID,
129 if(species == fgkEventSelectionEffID)
130 path = Form("%s/%s_%d_%d_%d_%d_%d_%d.root",
131 fEventSelectionEffPath.Data(),
132 fgkEventSelectionEffID,
139 if(species == fgkSharingEffID)
140 path = Form("%s/%s_%d_%d_%d_%d_%d_%d.root",
141 fSharingEffPath.Data(),
152 //____________________________________________________________________
153 void AliFMDAnaParameters::Init(Bool_t forceReInit, UInt_t what)
155 // Initialize the parameters manager. We need to get stuff from files here.
157 if (forceReInit) fIsInit = kFALSE;
159 if (what & kBackgroundCorrection) InitBackground();
160 if (what & kEnergyDistributions) InitEnergyDists();
161 if (what & kEventSelectionEfficiency) InitEventSelectionEff();
162 if (what & kSharingEfficiency) InitSharingEff();
171 //____________________________________________________________________
173 void AliFMDAnaParameters::InitBackground() {
174 //Init background correction objects.
176 TFile* fin = TFile::Open(GetPath(fgkBackgroundID));
180 fBackground = dynamic_cast<AliFMDAnaCalibBackgroundCorrection*>(fin->Get(fgkBackgroundID));
181 if (!fBackground) AliFatal("Invalid background object from CDB");
187 //____________________________________________________________________
189 void AliFMDAnaParameters::InitEnergyDists() {
190 //Init energy distributions
191 TFile* fin = TFile::Open(GetPath(fgkEnergyDistributionID));
195 fEnergyDistribution = dynamic_cast<AliFMDAnaCalibEnergyDistribution*>(fin->Get(fgkEnergyDistributionID));
197 if (!fEnergyDistribution) AliFatal("Invalid background object from CDB");
201 //____________________________________________________________________
203 void AliFMDAnaParameters::InitEventSelectionEff() {
204 //Init event selection objects
206 TFile* fin = TFile::Open(GetPath(fgkEventSelectionEffID));
210 fEventSelectionEfficiency = dynamic_cast<AliFMDAnaCalibEventSelectionEfficiency*>(fin->Get(fgkEventSelectionEffID));
211 if (!fEventSelectionEfficiency) AliFatal("Invalid background object from CDB");
215 //____________________________________________________________________
217 void AliFMDAnaParameters::InitSharingEff() {
219 fSharingObjectPresent = kTRUE;
220 TFile* fin = TFile::Open(GetPath(fgkSharingEffID));
223 fSharingObjectPresent = kFALSE;
227 fSharingEfficiency = dynamic_cast<AliFMDAnaCalibSharingEfficiency*>(fin->Get(fgkSharingEffID));
228 if (!fSharingEfficiency) {
229 fSharingObjectPresent = kFALSE;
234 //____________________________________________________________________
235 void AliFMDAnaParameters::FindEtaLimits() {
237 fEtaLowBinLimits.SetBins(4,0,4,2,0,2,GetNvtxBins(),0,GetNvtxBins());
238 fEtaHighBinLimits.SetBins(4,0,4,2,0,2,GetNvtxBins(),0,GetNvtxBins());
239 for(Int_t det=0; det<=3;det++) {
240 Int_t nRings = (det<=1 ? 1 : 2);
241 for (UShort_t ir = 0; ir < nRings; ir++) {
242 Char_t ringChar = (ir == 0 ? 'I' : 'O');
243 for(Int_t v =0; v<GetNvtxBins(); v++) {
244 fEtaLowBinLimits.SetBinContent(det,ir,v,GetFirstEtaBinFromMap(v, det, ringChar));
245 fEtaHighBinLimits.SetBinContent(det,ir,v,GetLastEtaBinFromMap(v, det, ringChar));
246 //std::cout<<det<<" "<<ringChar<<" "<<fEtaLowBinLimits.GetBinContent(det,ir,v)<<" "<<fEtaHighBinLimits.GetBinContent(det,ir,v)<<std::endl;
252 //____________________________________________________________________
254 void AliFMDAnaParameters::PrintStatus() const
256 //Print current status
257 TString energystring;
260 energystring.Form("900 GeV"); break;
262 energystring.Form("7000 GeV"); break;
264 energystring.Form("10000 GeV"); break;
266 energystring.Form("14000 GeV"); break;
268 energystring.Form("invalid energy"); break;
270 TString triggerstring;
273 triggerstring.Form("Minimum bias 1"); break;
275 triggerstring.Form("Minimum bias 2"); break;
277 triggerstring.Form("SPD FAST OR"); break;
279 triggerstring.Form("NO TRIGGER TEST"); break;
281 energystring.Form("invalid trigger"); break;
286 magstring.Form("5 kGaus"); break;
288 magstring.Form("0 kGaus"); break;
290 magstring.Form("invalid mag field"); break;
292 TString collsystemstring;
295 collsystemstring.Form("p+p"); break;
297 collsystemstring.Form("Pb+Pb"); break;
299 collsystemstring.Form("invalid collision system"); break;
303 std::cout<<"Energy = "<<energystring.Data()<<std::endl;
304 std::cout<<"Trigger = "<<triggerstring.Data()<<std::endl;
305 std::cout<<"Mag Field = "<<magstring.Data()<<std::endl;
306 std::cout<<"Coll System = "<<collsystemstring.Data()<<std::endl;
312 //____________________________________________________________________
313 Float_t AliFMDAnaParameters::GetVtxCutZ() {
314 //Get the z vtx cut in analysis
316 AliWarning("Not initialized yet. Call Init() to remedy");
320 return fBackground->GetVtxCutZ();
323 //____________________________________________________________________
324 Int_t AliFMDAnaParameters::GetNvtxBins() {
325 //Get number of vtx bins
327 AliWarning("Not initialized yet. Call Init() to remedy");
331 return fBackground->GetNvtxBins();
333 //____________________________________________________________________
334 TH1F* AliFMDAnaParameters::GetEnergyDistribution(Int_t det, Char_t ring, Float_t eta) {
336 return fEnergyDistribution->GetEnergyDistribution(det, ring, eta);
338 //____________________________________________________________________
339 TH1F* AliFMDAnaParameters::GetEmptyEnergyDistribution(Int_t det, Char_t ring) {
341 return fEnergyDistribution->GetEmptyEnergyDistribution(det, ring);
343 //____________________________________________________________________
344 TH1F* AliFMDAnaParameters::GetRingEnergyDistribution(Int_t det, Char_t ring) {
346 return fEnergyDistribution->GetRingEnergyDistribution(det, ring);
348 //____________________________________________________________________
349 Float_t AliFMDAnaParameters::GetSigma(Int_t det, Char_t ring, Float_t eta) {
350 //Get sigma of Landau fits
352 AliWarning("Not initialized yet. Call Init() to remedy");
356 TH1F* hEnergyDist = GetEnergyDistribution(det,ring, eta);
357 TF1* fitFunc = hEnergyDist->GetFunction("FMDfitFunc");
359 //AliWarning(Form("No function for FMD%d%c, eta %f",det,ring,eta));
362 Float_t sigma = fitFunc->GetParameter(2);
367 //____________________________________________________________________
368 Float_t AliFMDAnaParameters::GetMPV(Int_t det, Char_t ring, Float_t eta) {
369 //Get MPV of landau fits
371 AliWarning("Not initialized yet. Call Init() to remedy");
374 //AliFMDAnaParameters* pars = AliFMDAnaParameters::Instance();
375 TH1F* hEnergyDist = GetEnergyDistribution(det,ring,eta);
376 TF1* fitFunc = hEnergyDist->GetFunction("FMDfitFunc");
378 AliWarning(Form("No function for FMD%d%c, eta %f",det,ring,eta));
379 std::cout<<hEnergyDist->GetEntries()<<" "<<GetEtaBin(eta)<<std::endl;
383 Float_t mpv = fitFunc->GetParameter(1);
386 //____________________________________________________________________
387 Float_t AliFMDAnaParameters::GetConstant(Int_t det, Char_t ring, Float_t eta) {
388 //Get constant parameter of Landau fits
390 AliWarning("Not initialized yet. Call Init() to remedy");
394 TH1F* hEnergyDist = GetEnergyDistribution(det,ring,eta);
395 TF1* fitFunc = hEnergyDist->GetFunction("FMDfitFunc");
397 AliWarning(Form("No function for FMD%d%c, eta %f",det,ring,eta));
401 Float_t mpv = fitFunc->GetParameter(0);
404 //____________________________________________________________________
405 Float_t AliFMDAnaParameters::Get2MIPWeight(Int_t det, Char_t ring, Float_t eta) {
406 //Get 2 MIP weights of convoluted Landau fits
408 AliWarning("Not initialized yet. Call Init() to remedy");
412 TH1F* hEnergyDist = GetEnergyDistribution(det,ring,eta);
413 TF1* fitFunc = hEnergyDist->GetFunction("FMDfitFunc");
414 if(!fitFunc) return 0;
415 Float_t twoMIPweight = fitFunc->GetParameter(3);
419 if(twoMIPweight < 1e-05)
424 //____________________________________________________________________
425 Float_t AliFMDAnaParameters::Get3MIPWeight(Int_t det, Char_t ring, Float_t eta) {
426 //Get 3 MIP weights of convoluted Landau fits
428 AliWarning("Not initialized yet. Call Init() to remedy");
432 TH1F* hEnergyDist = GetEnergyDistribution(det,ring,eta);
433 TF1* fitFunc = hEnergyDist->GetFunction("FMDfitFunc");
434 if(!fitFunc) return 0;
435 Float_t threeMIPweight = fitFunc->GetParameter(4);
437 if(threeMIPweight < 1e-05)
440 Float_t twoMIPweight = fitFunc->GetParameter(3);
442 if(twoMIPweight < 1e-05)
445 return threeMIPweight;
447 //____________________________________________________________________
448 Int_t AliFMDAnaParameters::GetNetaBins() {
449 return GetBackgroundCorrection(1,'I',0)->GetNbinsX();
452 //____________________________________________________________________
453 Float_t AliFMDAnaParameters::GetEtaMin() {
455 return GetBackgroundCorrection(1,'I',0)->GetXaxis()->GetXmin();
457 //____________________________________________________________________
458 Float_t AliFMDAnaParameters::GetEtaMax() {
460 return GetBackgroundCorrection(1,'I',0)->GetXaxis()->GetXmax();
463 //____________________________________________________________________
464 Int_t AliFMDAnaParameters::GetEtaBin(Float_t eta) {
465 TAxis testaxis(GetNetaBins(),GetEtaMin(),GetEtaMax());
466 Int_t binnumber = testaxis.FindBin(eta) ;
471 //____________________________________________________________________
473 TH2F* AliFMDAnaParameters::GetBackgroundCorrection(Int_t det,
476 //Get background correction histogram
478 AliWarning("Not initialized yet. Call Init() to remedy");
484 if(vtxbin > fBackground->GetNvtxBins()) {
485 AliWarning(Form("No background object for vertex bin %d", vtxbin));
489 return fBackground->GetBgCorrection(det,ring,vtxbin);
491 //____________________________________________________________________
493 TH1F* AliFMDAnaParameters::GetDoubleHitCorrection(Int_t det,
495 //Get correction for several hits in strips for p+p
497 AliWarning("Not initialized yet. Call Init() to remedy");
501 return fBackground->GetDoubleHitCorrection(det,ring);
503 //_____________________________________________________________________
504 TH1F* AliFMDAnaParameters::GetSPDDeadCorrection(Int_t vtxbin) {
506 //Get correction for several hits in strips for p+p
508 AliWarning("Not initialized yet. Call Init() to remedy");
512 return fBackground->GetSPDDeadCorrection(vtxbin);
514 //_____________________________________________________________________
515 Float_t AliFMDAnaParameters::GetEventSelectionEfficiency(Int_t vtxbin) {
516 //Get event selection efficiency object
518 AliWarning("Not initialized yet. Call Init() to remedy");
521 return fEventSelectionEfficiency->GetCorrection(vtxbin);
524 //_____________________________________________________________________
525 TH1F* AliFMDAnaParameters::GetSharingEfficiency(Int_t det, Char_t ring, Int_t vtxbin) {
526 //Get sharing efficiency object
528 AliWarning("Not initialized yet. Call Init() to remedy");
532 return fSharingEfficiency->GetSharingEff(det,ring,vtxbin);
535 //_____________________________________________________________________
536 TH1F* AliFMDAnaParameters::GetSharingEfficiencyTrVtx(Int_t det, Char_t ring, Int_t vtxbin) {
537 //Get sharing efficiency object TrVtx
539 AliWarning("Not initialized yet. Call Init() to remedy");
543 return fSharingEfficiency->GetSharingEffTrVtx(det,ring,vtxbin);
546 //_____________________________________________________________________
547 Float_t AliFMDAnaParameters::GetMaxR(Char_t ring) const {
555 AliWarning("Unknown ring - must be I or O!");
559 //_____________________________________________________________________
560 Float_t AliFMDAnaParameters::GetMinR(Char_t ring) const{
568 AliWarning("Unknown ring - must be I or O!");
573 //_____________________________________________________________________
574 void AliFMDAnaParameters::SetCorners(Char_t ring) {
575 //Set corners (taken from nominal geometry)
577 fCorner1.Set(4.9895, 15.3560);
578 fCorner2.Set(1.8007, 17.2000);
581 fCorner1.Set(4.2231, 26.6638);
582 fCorner2.Set(1.8357, 27.9500);
586 //_____________________________________________________________________
587 Float_t AliFMDAnaParameters::GetPhiFromSector(UShort_t det, Char_t ring, UShort_t sec) const
589 //Get phi from sector
590 Int_t nsec = (ring == 'I' ? 20 : 40);
593 basephi = 1.72787594;
594 if(det == 2 && ring == 'I')
595 basephi = 0.15707963;
596 if(det == 2 && ring == 'O')
597 basephi = 0.078539818;
598 if(det == 3 && ring == 'I')
599 basephi = 2.984513044;
600 if(det == 3 && ring == 'O')
601 basephi = 3.06305289;
603 Float_t step = 2*TMath::Pi() / nsec;
606 phi = basephi - sec*step;
608 phi = basephi + sec*step;
611 phi = phi +2*TMath::Pi();
612 if(phi > 2*TMath::Pi() )
613 phi = phi - 2*TMath::Pi();
617 //_____________________________________________________________________
618 Float_t AliFMDAnaParameters::GetEtaFromStrip(UShort_t det, Char_t ring, UShort_t sec, UShort_t strip, Float_t zvtx) const
620 //Calculate eta from strip with vertex (redundant with AliESDFMD::Eta)
621 Float_t rad = GetMaxR(ring)-GetMinR(ring);
622 Float_t nStrips = (ring == 'I' ? 512 : 256);
623 Float_t segment = rad / nStrips;
624 Float_t r = GetMinR(ring) + segment*strip;
626 Int_t hybrid = sec / 2;
629 if(!(hybrid%2)) z = 320.266; else z = 319.766;
631 if(det == 2 && ring == 'I' ) {
632 if(!(hybrid%2)) z = 83.666; else z = 83.166;
634 if(det == 2 && ring == 'O' ) {
635 if(!(hybrid%2)) z = 74.966; else z = 75.466;
637 if(det == 3 && ring == 'I' ) {
638 if(!(hybrid%2)) z = -63.066; else z = -62.566;
640 if(det == 3 && ring == 'O' ) {
641 if(!(hybrid%2)) z = -74.966; else z = -75.466;
644 //std::cout<<det<<" "<<ring<<" "<<sec<<" "<<hybrid<<" "<<z<<std::endl;
646 // Float_t r = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
647 Float_t theta = TMath::ATan2(r,z-zvtx);
648 Float_t eta = -1*TMath::Log(TMath::Tan(0.5*theta));
653 //_____________________________________________________________________
655 Bool_t AliFMDAnaParameters::GetVertex(const AliESDEvent* esd, Double_t* vertexXYZ)
657 //Get the vertex from the ESD
658 const AliESDVertex* vertex = 0;
659 vertex = esd->GetPrimaryVertexSPD();
662 vertex->GetXYZ(vertexXYZ);
664 //if(vertexXYZ[0] == 0 || vertexXYZ[1] == 0 )
667 if(vertex->GetNContributors() <= 0)
670 if(vertex->GetZRes() > 0.1 )
673 return vertex->GetStatus();
676 //____________________________________________________________________
677 Bool_t AliFMDAnaParameters::IsEventTriggered(const AliESDEvent *esd, Trigger trig) {
678 //Did we have trig trigger ?
679 Trigger old = fTrigger;
681 Bool_t retval = IsEventTriggered(esd);
686 //____________________________________________________________________
687 Bool_t AliFMDAnaParameters::IsEventTriggered(const AliESDEvent *esd) const {
688 // check if the event was triggered
690 if (fCentralSelection) return kTRUE;
691 ULong64_t triggerMask = esd->GetTriggerMask();
693 TString triggers = esd->GetFiredTriggerClasses();
695 //if(triggers.Contains("CINT1B-ABCE-NOPF-ALL") || triggers.Contains("CINT1B-E-NOPF-ALL")) return kTRUE;
696 //else return kFALSE;
697 //if(triggers.Contains("CINT1B-E-NOPF-ALL")) return kFALSE;
699 // if(triggers.Contains("CINT1A-ABCE-NOPF-ALL")) return kFALSE;
700 // if(triggers.Contains("CINT1C-ABCE-NOPF-ALL")) return kFALSE;
702 // definitions from p-p.cfg
703 ULong64_t spdFO = (1 << 14);
704 ULong64_t v0left = (1 << 11);
705 ULong64_t v0right = (1 << 12);
706 AliTriggerAnalysis tAna;
708 //REMOVE WHEN FINISHED PLAYING WITH TRIGGERS!
709 //fPhysicsSelection->IsCollisionCandidate(esd);
711 fPhysicsSelection->SetAnalyzeMC(kTRUE);
716 if( fPhysicsSelection->IsCollisionCandidate(esd))
720 // if (triggerMask & spdFO || ((triggerMask & v0left) || (triggerMask & v0right)))
726 if (triggerMask & spdFO && ((triggerMask & v0left) || (triggerMask & v0right)))
731 if (triggerMask & spdFO)
741 const AliMultiplicity* testmult = esd->GetMultiplicity();
742 Int_t nTrackLets = testmult->GetNumberOfTracklets();
743 Int_t nClusters = testmult->GetNumberOfSingleClusters();
744 Int_t fastOR = tAna.SPDFiredChips(esd, 0);
746 const AliESDVertex* vertex = 0;
747 vertex = esd->GetPrimaryVertexSPD();
748 Bool_t vtxstatus = vertex->GetStatus();
749 if(vertex->GetNContributors() <= 0)
752 if(vertex->GetZRes() > 0.1 )
755 Bool_t v0ABG = tAna.IsOfflineTriggerFired(esd, AliTriggerAnalysis::kV0ABG);
757 Bool_t v0CBG = tAna.IsOfflineTriggerFired(esd, AliTriggerAnalysis::kV0CBG);
758 Bool_t v0A = tAna.IsOfflineTriggerFired(esd, AliTriggerAnalysis::kV0A);
759 Bool_t v0C = tAna.IsOfflineTriggerFired(esd, AliTriggerAnalysis::kV0C);*/
760 // if(triggers.Contains("CINT1A-ABCE-NOPF-ALL") || triggers.Contains("CINT1C-ABCE-NOPF-ALL"))
761 if(triggers.Contains("CBEAMB-ABCE-NOPF-ALL"))
771 //____________________________________________________________________
773 AliFMDAnaParameters::GetStripLength(Char_t ring, UShort_t strip)
775 //Get length of a strip
777 Float_t rad = GetMaxR(ring)-GetMinR(ring);
778 Float_t nStrips = (ring == 'I' ? 512 : 256);
779 Float_t segment = rad / nStrips;
781 //TVector2* corner1 = fmdring.GetVertex(2);
782 // TVector2* corner2 = fmdring.GetVertex(3);
786 std::cout<<GetMaxR(ring)<<" "<<fmdring.GetMaxR()<<std::endl;
787 std::cout<<GetMinR(ring)<<" "<<fmdring.GetMinR()<<std::endl;
788 std::cout<<corner1->X()<<" "<<fCorner1.X()<<std::endl;
789 std::cout<<corner2->X()<<" "<<fCorner2.X()<<std::endl;
790 std::cout<<corner1->Y()<<" "<<fCorner1.Y()<<std::endl;
791 std::cout<<corner2->Y()<<" "<<fCorner2.Y()<<std::endl;*/
792 Float_t slope = (fCorner1.Y() - fCorner2.Y()) / (fCorner1.X() - fCorner2.X());
793 Float_t constant = (fCorner2.Y()*fCorner1.X()-(fCorner2.X()*fCorner1.Y())) / (fCorner1.X() - fCorner2.X());
794 Float_t radius = GetMinR(ring) + strip*segment;
796 Float_t d = TMath::Power(TMath::Abs(radius*slope),2) + TMath::Power(radius,2) - TMath::Power(constant,2);
798 Float_t arclength = GetBaseStripLength(ring,strip);
801 Float_t x = (-1*TMath::Sqrt(d) -slope*constant) / (1+TMath::Power(slope,2));
802 Float_t y = slope*x + constant;
803 Float_t theta = TMath::ATan2(x,y);
805 if(x < fCorner1.X() && y > fCorner1.Y()) {
806 arclength = radius*theta; //One sector since theta is by definition half-hybrid
816 //____________________________________________________________________
818 AliFMDAnaParameters::GetBaseStripLength(Char_t ring, UShort_t strip)
820 //Get length of strip assuming that corners are not cut away
821 Float_t rad = GetMaxR(ring)-GetMinR(ring);
822 Float_t nStrips = (ring == 'I' ? 512 : 256);
823 Float_t nSec = (ring == 'I' ? 20 : 40);
824 Float_t segment = rad / nStrips;
825 Float_t basearc = 2*TMath::Pi() / (0.5*nSec); // One hybrid: 36 degrees inner, 18 outer
826 Float_t radius = GetMinR(ring) + strip*segment;
827 Float_t basearclength = 0.5*basearc * radius; // One sector
829 return basearclength;
831 //____________________________________________________________________
832 Int_t AliFMDAnaParameters::GetFirstEtaBinFromMap(Int_t vtxbin, Int_t det, Char_t ring)
834 TH2F* hBg = GetBackgroundCorrection(det,ring,vtxbin);
836 if(det == 0) return hBg->GetXaxis()->FindBin(-1.95);
839 Int_t nNonZeroFirst = 0;
841 for(Int_t i=1;i<=hBg->GetNbinsX();i++) {
842 if(nNonZeroFirst == fNumberOfEtaBinsToCut && firstbin==-1) firstbin = i;
844 for(Int_t j=1;j<=hBg->GetNbinsY();j++) {
846 Float_t value = hBg->GetBinContent(i,j);
848 if(value > 0.001 && nNonZeroFirst<fNumberOfEtaBinsToCut)
849 {nNonZeroFirst++; break;}
858 //____________________________________________________________________
859 Int_t AliFMDAnaParameters::GetLastEtaBinFromMap(Int_t vtxbin, Int_t det, Char_t ring)
861 TH2F* hBg = GetBackgroundCorrection(det,ring,vtxbin);
863 Int_t nNonZeroLast = 0;
865 if(det == 0) return hBg->GetXaxis()->FindBin(1.95);
867 for(Int_t i=hBg->GetNbinsX();i>0;i--) {
868 if(nNonZeroLast == fNumberOfEtaBinsToCut && lastbin==-1) lastbin = i;
870 for(Int_t j=1;j<=hBg->GetNbinsY();j++) {
872 Float_t value = hBg->GetBinContent(i,j);
874 if(value > 0.001 && nNonZeroLast<fNumberOfEtaBinsToCut)
875 {nNonZeroLast++; break; }
884 //____________________________________________________________________
885 Int_t AliFMDAnaParameters::GetFirstEtaBinToInclude(Int_t vtxbin, Int_t det, Char_t ring)
887 Int_t ringNumber = (ring == 'I' ? 0 : 1);
888 return fEtaLowBinLimits.GetBinContent(det,ringNumber,vtxbin);
892 //____________________________________________________________________
893 Int_t AliFMDAnaParameters::GetLastEtaBinToInclude(Int_t vtxbin, Int_t det, Char_t ring)
895 Int_t ringNumber = (ring == 'I' ? 0 : 1);
896 return fEtaHighBinLimits.GetBinContent(det,ringNumber,vtxbin);
899 //____________________________________________________________________