[u/mrichter/AliRoot.git] / PWG3 / hfe / AliHFEpidTRD.cxx

/**************************************************************************
* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
*                                                                        *
* Author: The ALICE Off-line Project.                                    *
* Contributors are mentioned in the code where appropriate.              *
*                                                                        *
* Permission to use, copy, modify and distribute this software and its   *
* documentation strictly for non-commercial purposes is hereby granted   *
* without fee, provided that the above copyright notice appears in all   *
* copies and that both the copyright notice and this permission notice   *
* appear in the supporting documentation. The authors make no claims     *
* about the suitability of this software for any purpose. It is          *
* provided "as is" without express or implied warranty.                  *
**************************************************************************/

/* $Id$ */

//
// Class for TRD PID
// Implements the abstract base class AliHFEpidbase 
// Make PID does the PID decision 
// Class further contains TRD specific cuts and QA histograms 
//  
// Authors: 
//   Markus Fasel <M.Fasel@gsi.de>  
// 
#include <TH1F.h>
#include <TH2F.h>
#include <THnSparse.h>
#include <TList.h>
#include <TString.h>

#include "AliAODpidUtil.h"
#include "AliAODPid.h"
#include "AliAODTrack.h"
#include "AliAODMCParticle.h"
#include "AliESDtrack.h"
#include "AliESDpid.h"
#include "AliLog.h"
#include "AliMCParticle.h"
#include "AliPID.h"

#include "AliHFEpidQAmanager.h"
#include "AliHFEpidTRD.h"

ClassImp(AliHFEpidTRD)

const Double_t AliHFEpidTRD::fgkVerySmall = 1e-12;

//___________________________________________________________________
AliHFEpidTRD::AliHFEpidTRD() :
    AliHFEpidBase()
  , fMinP(1.)
  , fElectronEfficiency(0.91)
  , fPIDMethod(kNN)
{
  //
  // default  constructor
  // 
  memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
  SetUseDefaultParameters();
}

//___________________________________________________________________
AliHFEpidTRD::AliHFEpidTRD(const char* name) :
    AliHFEpidBase(name)
  , fMinP(1.)
  , fElectronEfficiency(0.91)
  , fPIDMethod(kNN)
{
  //
  // default  constructor
  // 
  memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
  SetUseDefaultParameters();
}

//___________________________________________________________________
AliHFEpidTRD::AliHFEpidTRD(const AliHFEpidTRD &ref):
    AliHFEpidBase("")
  , fMinP(ref.fMinP)
  , fElectronEfficiency(ref.fElectronEfficiency)
  , fPIDMethod(ref.fPIDMethod)
{
  //
  // Copy constructor
  //
  memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
  ref.Copy(*this);
}

//___________________________________________________________________
AliHFEpidTRD &AliHFEpidTRD::operator=(const AliHFEpidTRD &ref){
  //
  // Assignment operator
  //
  if(this != &ref){
    ref.Copy(*this);
  }
  return *this;
}

//___________________________________________________________________
void AliHFEpidTRD::Copy(TObject &ref) const {
  //
  // Performs the copying of the object
  //
  AliHFEpidTRD &target = dynamic_cast<AliHFEpidTRD &>(ref);
  
  Bool_t defaultParameters = UseDefaultParameters();
  target.SetUseDefaultParameters(defaultParameters);
  target.fMinP = fMinP;
  target.fPIDMethod = fPIDMethod;
  target.fElectronEfficiency = fElectronEfficiency;
  memcpy(target.fThreshParams, fThreshParams, sizeof(Double_t) * kThreshParams);
  AliHFEpidBase::Copy(ref);
}

//___________________________________________________________________
AliHFEpidTRD::~AliHFEpidTRD(){
  //
  // Destructor
  //
}

//______________________________________________________
Bool_t AliHFEpidTRD::InitializePID(){
  //
  // InitializePID: Load TRD thresholds and create the electron efficiency axis
  // to navigate 
  //
  if(UseDefaultParameters()){
    if(fPIDMethod == kLQ)
      InitParameters1DLQ();
    else
      InitParameters();
  }
  return kTRUE;
}

//______________________________________________________
Int_t AliHFEpidTRD::IsSelected(const AliHFEpidObject *track, AliHFEpidQAmanager *pidqa) const {
  //
  // Does PID for TRD alone:
  // PID thresholds based on 90% Electron Efficiency level approximated by a linear 
  // step function
  //
  AliDebug(1, "Applying TRD PID");
  if((!fESDpid && track->IsESDanalysis()) || (!fAODpid && track->IsAODanalysis())){ 
    AliDebug(1, "Cannot process track");
    return 0;
  }

  AliHFEpidObject::AnalysisType_t anatype = track->IsESDanalysis() ? AliHFEpidObject::kESDanalysis: AliHFEpidObject::kAODanalysis;
  Double_t p = GetP(track->GetRecTrack(), anatype);
  if(p < fMinP){ 
    AliDebug(1, Form("Track momentum below %f", fMinP));
    return 0;
  }

  if(pidqa) pidqa->ProcessTrack(track, AliHFEpid::kTRDpid, AliHFEdetPIDqa::kBeforePID); 
  Double_t electronLike = GetElectronLikelihood(track->GetRecTrack(), anatype);
  Double_t threshold = GetTRDthresholds(fElectronEfficiency, p);
  AliDebug(1, Form("Threshold: %f\n", threshold));
  if(electronLike > threshold){
    if(pidqa) pidqa->ProcessTrack(track, AliHFEpid::kTRDpid, AliHFEdetPIDqa::kAfterPID);
    return 11;
  }
  return 211;

}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetTRDthresholds(Double_t electronEff, Double_t p) const { 
  //
  // Return momentum dependent and electron efficiency dependent TRD thresholds
  // 
  Double_t params[4];
  GetParameters(electronEff, params);
  Double_t threshold = 1. - params[0] - params[1] * p - params[2] * TMath::Exp(-params[3] * p);
  return TMath::Max(TMath::Min(threshold, 0.99), 0.2); // truncate the threshold upperwards to 0.999 and lowerwards to 0.2 and exclude unphysical values
}

//___________________________________________________________________
void AliHFEpidTRD::SetThresholdParameters(Double_t electronEff, Double_t *params){
  //
  // Set threshold parameters for the given bin
  //
  if(electronEff >= 1. || electronEff < 0.7) return;
  Int_t effbin = static_cast<Int_t>((electronEff - 0.7)/0.05); 
  memcpy(&fThreshParams[effbin * 4], params, sizeof(Double_t) * 4); 
  SetUseDefaultParameters(kFALSE);
}

//___________________________________________________________________
void AliHFEpidTRD::InitParameters(){
  //
  // Fill the Parameters into an array
  //

  AliDebug(2, "Loading threshold Parameter");
  // Parameters for 6 Layers
  fThreshParams[0] = -0.001839; // 0.7 electron eff
  fThreshParams[1] = 0.000276;
  fThreshParams[2] = 0.044902; 
  fThreshParams[3] = 1.726751;
  fThreshParams[4] = -0.002405; // 0.75 electron eff
  fThreshParams[5] = 0.000372;
  fThreshParams[6] = 0.061775;
  fThreshParams[7] = 1.739371;
  fThreshParams[8] = -0.003178; // 0.8 electron eff
  fThreshParams[9] = 0.000521;
  fThreshParams[10] = 0.087585;
  fThreshParams[11] = 1.749154;
  fThreshParams[12] = -0.004058; // 0.85 electron eff
  fThreshParams[13] = 0.000748;
  fThreshParams[14] = 0.129583;
  fThreshParams[15] = 1.782323;
  fThreshParams[16] = -0.004967; // 0.9 electron eff
  fThreshParams[17] = 0.001216;
  fThreshParams[18] = 0.210128;
  fThreshParams[19] = 1.807665;
  fThreshParams[20] = -0.000996; // 0.95 electron eff
  fThreshParams[21] = 0.002627;
  fThreshParams[22] = 0.409099;
  fThreshParams[23] = 1.787076;
}

//___________________________________________________________________
void AliHFEpidTRD::InitParameters1DLQ(){
  //
  // Init Parameters for 1DLQ PID (M. Fasel, Sept. 6th, 2010)
  //

  // Parameters for 6 Layers
  AliDebug(2, Form("Loading threshold parameter for Method 1DLQ"));
  fThreshParams[0] = -0.02241; // 0.7 electron eff
  fThreshParams[1] = 0.05043;
  fThreshParams[2] = 0.7925; 
  fThreshParams[3] = 2.625;
  fThreshParams[4] = 0.07438; // 0.75 electron eff
  fThreshParams[5] = 0.05158;
  fThreshParams[6] = 2.864;
  fThreshParams[7] = 4.356;
  fThreshParams[8] = 0.1977; // 0.8 electron eff
  fThreshParams[9] = 0.05956;
  fThreshParams[10] = 2.853;
  fThreshParams[11] = 3.713;
  fThreshParams[12] = 0.5206; // 0.85 electron eff
  fThreshParams[13] = 0.03077;
  fThreshParams[14] = 2.966;
  fThreshParams[15] = 4.07;
  fThreshParams[16] = 0.8808; // 0.9 electron eff
  fThreshParams[17] = 0.002092;
  fThreshParams[18] = 1.17;
  fThreshParams[19] = 4.506;
  fThreshParams[20] = 1.; // 0.95 electron eff
  fThreshParams[21] = 0.;
  fThreshParams[22] = 0.;
  fThreshParams[23] = 0.;

}

//___________________________________________________________________
void AliHFEpidTRD::GetParameters(Double_t electronEff, Double_t *parameters) const {
  //
  // return parameter set for the given efficiency bin
  //
  Int_t effbin = static_cast<Int_t>((electronEff - 0.7)/0.05);
  memcpy(parameters, fThreshParams + effbin * 4, sizeof(Double_t) * 4);
}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetElectronLikelihood(const AliVParticle *track, AliHFEpidObject::AnalysisType_t anaType) const {
  //
  // Get TRD likelihoods for ESD respectively AOD tracks
  //
  Double_t pidProbs[AliPID::kSPECIES]; memset(pidProbs, 0, sizeof(Double_t) * AliPID::kSPECIES);
  if(anaType == AliHFEpidObject::kESDanalysis){
    const AliESDtrack *esdtrack = dynamic_cast<const AliESDtrack *>(track);
    if(esdtrack) esdtrack->GetTRDpid(pidProbs);
  } else {
    const AliAODTrack *aodtrack = dynamic_cast<const AliAODTrack *>(track);
    if(aodtrack)fAODpid->MakeTRDPID(const_cast<AliAODTrack *>(aodtrack), pidProbs);
  }
  return pidProbs[AliPID::kElectron];
}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetP(const AliVParticle *track, AliHFEpidObject::AnalysisType_t anaType) const {
  //
  // Get the Momentum in the TRD
  //
  Double_t p = 0.;
  if(anaType == AliHFEpidObject::kESDanalysis){
    const AliESDtrack *esdtrack = dynamic_cast<const AliESDtrack *>(track);
    if(esdtrack) p = esdtrack->GetOuterParam() ? esdtrack->GetOuterParam()->P() : esdtrack->P();
  } else {
    const AliAODTrack *aodtrack = dynamic_cast<const AliAODTrack *>(track);
    if(aodtrack) p = aodtrack->P();
  }
  return p;
}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetChargeLayer(const AliVParticle *track, UInt_t layer, AliHFEpidObject::AnalysisType_t anaType) const {
  //
  // Get the Charge in a single TRD layer
  //
  if(layer >= 6) return 0.;
  Double_t charge = 0.;
  if(anaType == AliHFEpidObject::kESDanalysis){
    const AliESDtrack *esdtrack = dynamic_cast<const AliESDtrack *>(track);
    if(esdtrack)
      for(Int_t islice = 0; islice < esdtrack->GetNumberOfTRDslices(); islice++) charge += esdtrack->GetTRDslice(static_cast<UInt_t>(layer), islice);
  } else {
    const AliAODTrack *aodtrack = dynamic_cast<const AliAODTrack *>(track);
    AliAODPid *aoddetpid = aodtrack ? aodtrack->GetDetPid() : NULL;
    if(aoddetpid)
      for(Int_t islice = 0; islice < aoddetpid->GetTRDnSlices(); islice++) charge += aoddetpid->GetTRDsignal()[layer * aoddetpid->GetTRDnSlices() + islice];
  }
  return charge;
}

//___________________________________________________________________
void AliHFEpidTRD::GetTRDmomenta(const AliVParticle *track, AliHFEpidObject::AnalysisType_t anaType, Double_t *mom) const {
  //
  // Fill Array with momentum information at the TRD tracklet
  //
  if(anaType == AliHFEpidObject::kESDanalysis){
    const AliESDtrack *esdtrack = dynamic_cast<const AliESDtrack *>(track);
    if(esdtrack)
      for(Int_t itl = 0; itl < 6; itl++) 
        mom[itl] = esdtrack->GetTRDmomentum(itl);
  } else {
    const AliAODTrack *aodtrack = dynamic_cast<const AliAODTrack *>(track);
    AliAODPid *aoddetpid = aodtrack ? aodtrack->GetDetPid() : NULL;
    if(aoddetpid){
      Float_t *trdmom = aoddetpid->GetTRDmomentum();
      for(Int_t itl = 0; itl < 6; itl++){
        mom[itl] = trdmom[itl]; 
      }
    }
  }
}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetTRDSignalV1(const AliESDtrack *track, Float_t truncation) const {
  //
  // Calculation of the TRD Signal via truncated mean
  // Method 1: Take all Slices available
  // cut out 0s
  // Order them in increasing order
  // Cut out the upper third
  // Calculate mean over the last 2/3 slices
  //
  const Int_t kNSlices = 48;
  const Int_t kSlicePerLayer = 7;
  // Weight the slice to equalize the MPV of the dQ/dl-distribution per slice to the one in the first slice
  // Pions are used as reference for the equalization
  const Double_t kWeightSlice[8] = {1., 2.122, 1.8, 1.635, 1.595, 1.614, 1.16, 7.0};
  AliDebug(3, Form("Number of Tracklets: %d\n", track->GetTRDntrackletsPID()));
  Double_t trdSlices[kNSlices], tmp[kNSlices];
  Int_t indices[48];
  Int_t icnt = 0;
  for(Int_t idet = 0; idet < 6; idet++)
    for(Int_t islice = 0; islice < kSlicePerLayer; islice++){
      AliDebug(2, Form("Chamber[%d], Slice[%d]: TRDSlice = %f", idet, islice, track->GetTRDslice(idet, islice)));
      if(TMath::Abs(track->GetTRDslice(idet, islice)) < fgkVerySmall) continue;;
      trdSlices[icnt++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
    }
  AliDebug(1, Form("Number of Slices: %d\n", icnt));
  if(icnt < 6) return 0.;   // We need at least 6 Slices for the truncated mean
  TMath::Sort(icnt, trdSlices, indices, kFALSE);
  memcpy(tmp, trdSlices, sizeof(Double_t) * icnt);
  for(Int_t ien = 0; ien < icnt; ien++)
    trdSlices[ien] = tmp[indices[ien]];
  Double_t trdSignal = TMath::Mean(static_cast<Int_t>(static_cast<Float_t>(icnt) * truncation), trdSlices);
  Double_t mom = track->GetOuterParam() ? track->GetOuterParam()->P() : -1;
  AliDebug(3, Form("PID Meth. 1: p[%f], TRDSignal[%f]", mom, trdSignal));
  return trdSignal;
}

//___________________________________________________________________
Double_t AliHFEpidTRD::GetTRDSignalV2(const AliESDtrack *track, Float_t truncation) const {
  //
  // Calculation of the TRD Signal via truncated mean
  // Method 2: Take only first 5 slices per chamber
  // Order them in increasing order
  // Cut out upper half 
  // Now do mean with the reamining 3 slices per chamber
  //
  const Double_t kWeightSlice[8] = {1., 2.122, 1.8, 1.635, 1.595, 1.614, 1.16, 7.0};
  const Int_t kLayers = 6;
  const Int_t kSlicesLow = 6;
  const Int_t kSlicesHigh = 1;
  Double_t trdSlicesLowTime[kLayers*kSlicesLow], trdSlicesRemaining[kLayers*(kSlicesHigh + kSlicesLow)];
  Int_t indices[kLayers*kSlicesLow];
  Int_t cntLowTime=0, cntRemaining = 0;
  for(Int_t idet = 0; idet < 6; idet++)
    for(Int_t islice = 0; islice < kSlicesLow+kSlicesHigh; islice++){
      if(TMath::Abs(track->GetTRDslice(idet, islice)) < fgkVerySmall) continue;;
      if(islice < kSlicesLow){
        AliDebug(3, Form("Part 1, Det[%d], Slice[%d], TRDSlice: %f", idet, islice, track->GetTRDslice(idet, islice)));
        trdSlicesLowTime[cntLowTime++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
      } else{
        AliDebug(3, Form("Part 1, Det[%d], Slice[%d], TRDSlice: %f", idet, islice, track->GetTRDslice(idet, islice)));
        trdSlicesRemaining[cntRemaining++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
      }
    }
  if(cntLowTime < 4 || cntRemaining < 2) return 0.; // Min. Number of Slices at high time is 2 (matches with 1 layer), for the truncated mean we need at least 4 Slices
  TMath::Sort(cntLowTime, trdSlicesLowTime, indices, kFALSE);
  // Fill the second array with the lower half of the first time bins
  for(Int_t ien = 0; ien < static_cast<Int_t>(static_cast<Float_t>(cntLowTime) * truncation); ien++)
    trdSlicesRemaining[cntRemaining++] = trdSlicesLowTime[indices[ien]];
  Double_t trdSignal = TMath::Mean(cntRemaining, trdSlicesRemaining);
  Double_t mom = track->GetOuterParam() ? track->GetOuterParam()->P() : -1;
  AliDebug(3, Form("PID Meth. 2: p[%f], TRDSignal[%f]", mom, trdSignal));
  return trdSignal;
}
Commit	Line	Data
809a4336	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	**************************************************************************/
27de2dfb	15
	16	/* $Id$ */
	17
50685501	18	//
	19	// Class for TRD PID
	20	// Implements the abstract base class AliHFEpidbase
	21	// Make PID does the PID decision
	22	// Class further contains TRD specific cuts and QA histograms
	23	//
	24	// Authors:
	25	// Markus Fasel <M.Fasel@gsi.de>
	26	//
809a4336	27	#include <TH1F.h>
75d81601	28	#include <TH2F.h>
e3fc062d	29	#include <THnSparse.h>
50685501	30	#include <TList.h>
809a4336	31	#include <TString.h>
809a4336	32
3a72645a	33	#include "AliAODpidUtil.h"
6555e2ad	34	#include "AliAODPid.h"
722347d8	35	#include "AliAODTrack.h"
722347d8	36	#include "AliAODMCParticle.h"
809a4336	37	#include "AliESDtrack.h"
e3fc062d	38	#include "AliESDpid.h"
75d81601	39	#include "AliLog.h"
722347d8	40	#include "AliMCParticle.h"
809a4336	41	#include "AliPID.h"
809a4336	42
3a72645a	43	#include "AliHFEpidQAmanager.h"
809a4336	44	#include "AliHFEpidTRD.h"
	45
	46	ClassImp(AliHFEpidTRD)
	47
75d81601	48	const Double_t AliHFEpidTRD::fgkVerySmall = 1e-12;
75d81601	49
faee3b18	50	//___________________________________________________________________
	51	AliHFEpidTRD::AliHFEpidTRD() :
	52	AliHFEpidBase()
e3fc062d	53	, fMinP(1.)
67fe7bd0	54	, fElectronEfficiency(0.91)
faee3b18	55	, fPIDMethod(kNN)
faee3b18	56	{
	57	//
	58	// default constructor
	59	//
bf892a6a	60	memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
bf892a6a	61	SetUseDefaultParameters();
faee3b18	62	}
faee3b18	63
809a4336	64	//___________________________________________________________________
	65	AliHFEpidTRD::AliHFEpidTRD(const char* name) :
	66	AliHFEpidBase(name)
e3fc062d	67	, fMinP(1.)
67fe7bd0	68	, fElectronEfficiency(0.91)
809a4336	69	, fPIDMethod(kNN)
809a4336	70	{
	71	//
	72	// default constructor
	73	//
dbe3abbe	74	memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
bf892a6a	75	SetUseDefaultParameters();
809a4336	76	}
	77
	78	//___________________________________________________________________
	79	AliHFEpidTRD::AliHFEpidTRD(const AliHFEpidTRD &ref):
	80	AliHFEpidBase("")
67fe7bd0	81	, fMinP(ref.fMinP)
	82	, fElectronEfficiency(ref.fElectronEfficiency)
	83	, fPIDMethod(ref.fPIDMethod)
809a4336	84	{
	85	//
	86	// Copy constructor
	87	//
dbe3abbe	88	memset(fThreshParams, 0, sizeof(Double_t) * kThreshParams);
809a4336	89	ref.Copy(*this);
	90	}
	91
	92	//___________________________________________________________________
	93	AliHFEpidTRD &AliHFEpidTRD::operator=(const AliHFEpidTRD &ref){
	94	//
	95	// Assignment operator
	96	//
	97	if(this != &ref){
	98	ref.Copy(*this);
	99	}
	100	return *this;
	101	}
	102
	103	//___________________________________________________________________
	104	void AliHFEpidTRD::Copy(TObject &ref) const {
	105	//
	106	// Performs the copying of the object
	107	//
	108	AliHFEpidTRD &target = dynamic_cast<AliHFEpidTRD &>(ref);
bf892a6a	109
	110	Bool_t defaultParameters = UseDefaultParameters();
	111	target.SetUseDefaultParameters(defaultParameters);
e3fc062d	112	target.fMinP = fMinP;
809a4336	113	target.fPIDMethod = fPIDMethod;
67fe7bd0	114	target.fElectronEfficiency = fElectronEfficiency;
dbe3abbe	115	memcpy(target.fThreshParams, fThreshParams, sizeof(Double_t) * kThreshParams);
809a4336	116	AliHFEpidBase::Copy(ref);
	117	}
	118
	119	//___________________________________________________________________
	120	AliHFEpidTRD::~AliHFEpidTRD(){
	121	//
	122	// Destructor
	123	//
809a4336	124	}
	125
	126	//______________________________________________________
	127	Bool_t AliHFEpidTRD::InitializePID(){
	128	//
	129	// InitializePID: Load TRD thresholds and create the electron efficiency axis
	130	// to navigate
	131	//
bf892a6a	132	if(UseDefaultParameters()){
	133	if(fPIDMethod == kLQ)
	134	InitParameters1DLQ();
	135	else
	136	InitParameters();
	137	}
809a4336	138	return kTRUE;
	139	}
	140
	141	//______________________________________________________
6555e2ad	142	Int_t AliHFEpidTRD::IsSelected(const AliHFEpidObject track, AliHFEpidQAmanager pidqa) const {
809a4336	143	//
	144	// Does PID for TRD alone:
	145	// PID thresholds based on 90% Electron Efficiency level approximated by a linear
	146	// step function
	147	//
3a72645a	148	AliDebug(1, "Applying TRD PID");
	149	if((!fESDpid && track->IsESDanalysis()) \|\| (!fAODpid && track->IsAODanalysis())){
	150	AliDebug(1, "Cannot process track");
	151	return 0;
	152	}
722347d8	153
3a72645a	154	AliHFEpidObject::AnalysisType_t anatype = track->IsESDanalysis() ? AliHFEpidObject::kESDanalysis: AliHFEpidObject::kAODanalysis;
	155	Double_t p = GetP(track->GetRecTrack(), anatype);
	156	if(p < fMinP){
	157	AliDebug(1, Form("Track momentum below %f", fMinP));
	158	return 0;
	159	}
809a4336	160
3a72645a	161	if(pidqa) pidqa->ProcessTrack(track, AliHFEpid::kTRDpid, AliHFEdetPIDqa::kBeforePID);
3a72645a	162	Double_t electronLike = GetElectronLikelihood(track->GetRecTrack(), anatype);
67fe7bd0	163	Double_t threshold = GetTRDthresholds(fElectronEfficiency, p);
0792aa82	164	AliDebug(1, Form("Threshold: %f\n", threshold));
3a72645a	165	if(electronLike > threshold){
3a72645a	166	if(pidqa) pidqa->ProcessTrack(track, AliHFEpid::kTRDpid, AliHFEdetPIDqa::kAfterPID);
0792aa82	167	return 11;
	168	}
	169	return 211;
3a72645a	170
809a4336	171	}
	172
	173	//___________________________________________________________________
6555e2ad	174	Double_t AliHFEpidTRD::GetTRDthresholds(Double_t electronEff, Double_t p) const {
dbe3abbe	175	//
	176	// Return momentum dependent and electron efficiency dependent TRD thresholds
	177	//
	178	Double_t params[4];
	179	GetParameters(electronEff, params);
0792aa82	180	Double_t threshold = 1. - params[0] - params[1] * p - params[2] * TMath::Exp(-params[3] * p);
0792aa82	181	return TMath::Max(TMath::Min(threshold, 0.99), 0.2); // truncate the threshold upperwards to 0.999 and lowerwards to 0.2 and exclude unphysical values
809a4336	182	}
809a4336	183
bf892a6a	184	//___________________________________________________________________
	185	void AliHFEpidTRD::SetThresholdParameters(Double_t electronEff, Double_t *params){
	186	//
	187	// Set threshold parameters for the given bin
	188	//
	189	if(electronEff >= 1. \|\| electronEff < 0.7) return;
	190	Int_t effbin = static_cast<Int_t>((electronEff - 0.7)/0.05);
	191	memcpy(&fThreshParams[effbin * 4], params, sizeof(Double_t) * 4);
	192	SetUseDefaultParameters(kFALSE);
	193	}
	194
809a4336	195	//___________________________________________________________________
dbe3abbe	196	void AliHFEpidTRD::InitParameters(){
	197	//
	198	// Fill the Parameters into an array
	199	//
	200
e3fc062d	201	AliDebug(2, "Loading threshold Parameter");
dbe3abbe	202	// Parameters for 6 Layers
	203	fThreshParams[0] = -0.001839; // 0.7 electron eff
	204	fThreshParams[1] = 0.000276;
	205	fThreshParams[2] = 0.044902;
	206	fThreshParams[3] = 1.726751;
	207	fThreshParams[4] = -0.002405; // 0.75 electron eff
	208	fThreshParams[5] = 0.000372;
	209	fThreshParams[6] = 0.061775;
	210	fThreshParams[7] = 1.739371;
	211	fThreshParams[8] = -0.003178; // 0.8 electron eff
	212	fThreshParams[9] = 0.000521;
	213	fThreshParams[10] = 0.087585;
	214	fThreshParams[11] = 1.749154;
	215	fThreshParams[12] = -0.004058; // 0.85 electron eff
	216	fThreshParams[13] = 0.000748;
	217	fThreshParams[14] = 0.129583;
	218	fThreshParams[15] = 1.782323;
	219	fThreshParams[16] = -0.004967; // 0.9 electron eff
	220	fThreshParams[17] = 0.001216;
	221	fThreshParams[18] = 0.210128;
	222	fThreshParams[19] = 1.807665;
	223	fThreshParams[20] = -0.000996; // 0.95 electron eff
	224	fThreshParams[21] = 0.002627;
	225	fThreshParams[22] = 0.409099;
	226	fThreshParams[23] = 1.787076;
809a4336	227	}
809a4336	228
e3fc062d	229	//___________________________________________________________________
	230	void AliHFEpidTRD::InitParameters1DLQ(){
	231	//
	232	// Init Parameters for 1DLQ PID (M. Fasel, Sept. 6th, 2010)
	233	//
	234
	235	// Parameters for 6 Layers
	236	AliDebug(2, Form("Loading threshold parameter for Method 1DLQ"));
	237	fThreshParams[0] = -0.02241; // 0.7 electron eff
	238	fThreshParams[1] = 0.05043;
	239	fThreshParams[2] = 0.7925;
	240	fThreshParams[3] = 2.625;
	241	fThreshParams[4] = 0.07438; // 0.75 electron eff
	242	fThreshParams[5] = 0.05158;
	243	fThreshParams[6] = 2.864;
	244	fThreshParams[7] = 4.356;
	245	fThreshParams[8] = 0.1977; // 0.8 electron eff
	246	fThreshParams[9] = 0.05956;
	247	fThreshParams[10] = 2.853;
	248	fThreshParams[11] = 3.713;
	249	fThreshParams[12] = 0.5206; // 0.85 electron eff
	250	fThreshParams[13] = 0.03077;
	251	fThreshParams[14] = 2.966;
	252	fThreshParams[15] = 4.07;
	253	fThreshParams[16] = 0.8808; // 0.9 electron eff
	254	fThreshParams[17] = 0.002092;
	255	fThreshParams[18] = 1.17;
	256	fThreshParams[19] = 4.506;
	257	fThreshParams[20] = 1.; // 0.95 electron eff
	258	fThreshParams[21] = 0.;
	259	fThreshParams[22] = 0.;
	260	fThreshParams[23] = 0.;
	261
	262	}
	263
809a4336	264	//___________________________________________________________________
6555e2ad	265	void AliHFEpidTRD::GetParameters(Double_t electronEff, Double_t *parameters) const {
dbe3abbe	266	//
	267	// return parameter set for the given efficiency bin
	268	//
0792aa82	269	Int_t effbin = static_cast<Int_t>((electronEff - 0.7)/0.05);
dbe3abbe	270	memcpy(parameters, fThreshParams + effbin * 4, sizeof(Double_t) * 4);
809a4336	271	}
75d81601	272
75d81601	273	//___________________________________________________________________
6555e2ad	274	Double_t AliHFEpidTRD::GetElectronLikelihood(const AliVParticle *track, AliHFEpidObject::AnalysisType_t anaType) const {
3a72645a	275	//
	276	// Get TRD likelihoods for ESD respectively AOD tracks
	277	//
	278	Double_t pidProbs[AliPID::kSPECIES]; memset(pidProbs, 0, sizeof(Double_t) * AliPID::kSPECIES);
	279	if(anaType == AliHFEpidObject::kESDanalysis){
	280	const AliESDtrack esdtrack = dynamic_cast<const AliESDtrack >(track);
bf892a6a	281	if(esdtrack) esdtrack->GetTRDpid(pidProbs);
3a72645a	282	} else {
3a72645a	283	const AliAODTrack aodtrack = dynamic_cast<const AliAODTrack >(track);
bf892a6a	284	if(aodtrack)fAODpid->MakeTRDPID(const_cast<AliAODTrack *>(aodtrack), pidProbs);
3a72645a	285	}
	286	return pidProbs[AliPID::kElectron];
	287	}
	288
	289	//___________________________________________________________________
6555e2ad	290	Double_t AliHFEpidTRD::GetP(const AliVParticle *track, AliHFEpidObject::AnalysisType_t anaType) const {
3a72645a	291	//
	292	// Get the Momentum in the TRD
	293	//
	294	Double_t p = 0.;
	295	if(anaType == AliHFEpidObject::kESDanalysis){
	296	const AliESDtrack esdtrack = dynamic_cast<const AliESDtrack >(track);
bf892a6a	297	if(esdtrack) p = esdtrack->GetOuterParam() ? esdtrack->GetOuterParam()->P() : esdtrack->P();
3a72645a	298	} else {
3a72645a	299	const AliAODTrack aodtrack = dynamic_cast<const AliAODTrack >(track);
bf892a6a	300	if(aodtrack) p = aodtrack->P();
3a72645a	301	}
	302	return p;
	303	}
	304
	305	//___________________________________________________________________
6555e2ad	306	Double_t AliHFEpidTRD::GetChargeLayer(const AliVParticle *track, UInt_t layer, AliHFEpidObject::AnalysisType_t anaType) const {
	307	//
	308	// Get the Charge in a single TRD layer
	309	//
	310	if(layer >= 6) return 0.;
	311	Double_t charge = 0.;
	312	if(anaType == AliHFEpidObject::kESDanalysis){
	313	const AliESDtrack esdtrack = dynamic_cast<const AliESDtrack >(track);
bf892a6a	314	if(esdtrack)
bf892a6a	315	for(Int_t islice = 0; islice < esdtrack->GetNumberOfTRDslices(); islice++) charge += esdtrack->GetTRDslice(static_cast<UInt_t>(layer), islice);
6555e2ad	316	} else {
6555e2ad	317	const AliAODTrack aodtrack = dynamic_cast<const AliAODTrack >(track);
bf892a6a	318	AliAODPid *aoddetpid = aodtrack ? aodtrack->GetDetPid() : NULL;
	319	if(aoddetpid)
	320	for(Int_t islice = 0; islice < aoddetpid->GetTRDnSlices(); islice++) charge += aoddetpid->GetTRDsignal()[layer * aoddetpid->GetTRDnSlices() + islice];
6555e2ad	321	}
	322	return charge;
	323	}
	324
	325	//___________________________________________________________________
bf892a6a	326	void AliHFEpidTRD::GetTRDmomenta(const AliVParticle track, AliHFEpidObject::AnalysisType_t anaType, Double_t mom) const {
	327	//
	328	// Fill Array with momentum information at the TRD tracklet
	329	//
	330	if(anaType == AliHFEpidObject::kESDanalysis){
	331	const AliESDtrack esdtrack = dynamic_cast<const AliESDtrack >(track);
	332	if(esdtrack)
	333	for(Int_t itl = 0; itl < 6; itl++)
	334	mom[itl] = esdtrack->GetTRDmomentum(itl);
	335	} else {
	336	const AliAODTrack aodtrack = dynamic_cast<const AliAODTrack >(track);
	337	AliAODPid *aoddetpid = aodtrack ? aodtrack->GetDetPid() : NULL;
	338	if(aoddetpid){
	339	Float_t *trdmom = aoddetpid->GetTRDmomentum();
	340	for(Int_t itl = 0; itl < 6; itl++){
	341	mom[itl] = trdmom[itl];
	342	}
	343	}
	344	}
	345	}
	346
	347	//___________________________________________________________________
	348	Double_t AliHFEpidTRD::GetTRDSignalV1(const AliESDtrack *track, Float_t truncation) const {
75d81601	349	//
	350	// Calculation of the TRD Signal via truncated mean
	351	// Method 1: Take all Slices available
	352	// cut out 0s
	353	// Order them in increasing order
	354	// Cut out the upper third
	355	// Calculate mean over the last 2/3 slices
	356	//
	357	const Int_t kNSlices = 48;
bf892a6a	358	const Int_t kSlicePerLayer = 7;
	359	// Weight the slice to equalize the MPV of the dQ/dl-distribution per slice to the one in the first slice
	360	// Pions are used as reference for the equalization
	361	const Double_t kWeightSlice[8] = {1., 2.122, 1.8, 1.635, 1.595, 1.614, 1.16, 7.0};
	362	AliDebug(3, Form("Number of Tracklets: %d\n", track->GetTRDntrackletsPID()));
75d81601	363	Double_t trdSlices[kNSlices], tmp[kNSlices];
	364	Int_t indices[48];
	365	Int_t icnt = 0;
	366	for(Int_t idet = 0; idet < 6; idet++)
bf892a6a	367	for(Int_t islice = 0; islice < kSlicePerLayer; islice++){
75d81601	368	AliDebug(2, Form("Chamber[%d], Slice[%d]: TRDSlice = %f", idet, islice, track->GetTRDslice(idet, islice)));
75d81601	369	if(TMath::Abs(track->GetTRDslice(idet, islice)) < fgkVerySmall) continue;;
bf892a6a	370	trdSlices[icnt++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
75d81601	371	}
	372	AliDebug(1, Form("Number of Slices: %d\n", icnt));
	373	if(icnt < 6) return 0.; // We need at least 6 Slices for the truncated mean
	374	TMath::Sort(icnt, trdSlices, indices, kFALSE);
	375	memcpy(tmp, trdSlices, sizeof(Double_t) * icnt);
	376	for(Int_t ien = 0; ien < icnt; ien++)
	377	trdSlices[ien] = tmp[indices[ien]];
bf892a6a	378	Double_t trdSignal = TMath::Mean(static_cast<Int_t>(static_cast<Float_t>(icnt) * truncation), trdSlices);
75d81601	379	Double_t mom = track->GetOuterParam() ? track->GetOuterParam()->P() : -1;
e3fc062d	380	AliDebug(3, Form("PID Meth. 1: p[%f], TRDSignal[%f]", mom, trdSignal));
75d81601	381	return trdSignal;
	382	}
	383
	384	//___________________________________________________________________
bf892a6a	385	Double_t AliHFEpidTRD::GetTRDSignalV2(const AliESDtrack *track, Float_t truncation) const {
75d81601	386	//
	387	// Calculation of the TRD Signal via truncated mean
	388	// Method 2: Take only first 5 slices per chamber
	389	// Order them in increasing order
	390	// Cut out upper half
	391	// Now do mean with the reamining 3 slices per chamber
	392	//
bf892a6a	393	const Double_t kWeightSlice[8] = {1., 2.122, 1.8, 1.635, 1.595, 1.614, 1.16, 7.0};
	394	const Int_t kLayers = 6;
	395	const Int_t kSlicesLow = 6;
	396	const Int_t kSlicesHigh = 1;
	397	Double_t trdSlicesLowTime[kLayerskSlicesLow], trdSlicesRemaining[kLayers(kSlicesHigh + kSlicesLow)];
	398	Int_t indices[kLayers*kSlicesLow];
75d81601	399	Int_t cntLowTime=0, cntRemaining = 0;
75d81601	400	for(Int_t idet = 0; idet < 6; idet++)
bf892a6a	401	for(Int_t islice = 0; islice < kSlicesLow+kSlicesHigh; islice++){
75d81601	402	if(TMath::Abs(track->GetTRDslice(idet, islice)) < fgkVerySmall) continue;;
bf892a6a	403	if(islice < kSlicesLow){
e3fc062d	404	AliDebug(3, Form("Part 1, Det[%d], Slice[%d], TRDSlice: %f", idet, islice, track->GetTRDslice(idet, islice)));
bf892a6a	405	trdSlicesLowTime[cntLowTime++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
75d81601	406	} else{
e3fc062d	407	AliDebug(3, Form("Part 1, Det[%d], Slice[%d], TRDSlice: %f", idet, islice, track->GetTRDslice(idet, islice)));
bf892a6a	408	trdSlicesRemaining[cntRemaining++] = track->GetTRDslice(idet, islice) * kWeightSlice[islice];
75d81601	409	}
	410	}
	411	if(cntLowTime < 4 \|\| cntRemaining < 2) return 0.; // Min. Number of Slices at high time is 2 (matches with 1 layer), for the truncated mean we need at least 4 Slices
	412	TMath::Sort(cntLowTime, trdSlicesLowTime, indices, kFALSE);
	413	// Fill the second array with the lower half of the first time bins
bf892a6a	414	for(Int_t ien = 0; ien < static_cast<Int_t>(static_cast<Float_t>(cntLowTime) * truncation); ien++)
75d81601	415	trdSlicesRemaining[cntRemaining++] = trdSlicesLowTime[indices[ien]];
	416	Double_t trdSignal = TMath::Mean(cntRemaining, trdSlicesRemaining);
	417	Double_t mom = track->GetOuterParam() ? track->GetOuterParam()->P() : -1;
e3fc062d	418	AliDebug(3, Form("PID Meth. 2: p[%f], TRDSignal[%f]", mom, trdSignal));
75d81601	419	return trdSignal;
75d81601	420	}