[u/mrichter/AliRoot.git] / PWG4 / totEt / AliAnalysisEtCommon.cxx

//Created by Christine Nattrass, Rebecca Scott, Irakli Martashvili
//University of Tennessee at Knoxville
//
// This class is designed for the analysis of the hadronic component of 
// transverse energy.  It is used by AliAnalysisTaskHadEt.
// This gets information about the hadronic component of the transverse energy 
// from tracks reconstructed in an event
// it has daughters, AliAnalysisEtCommonMonteCarlo and 
// AliAnalysisEtCommonReconstructed which loop over either Monte Carlo data or 
// real data to get Et

#include "AliAnalysisEtCommon.h"
#include "TMath.h"
#include "TList.h"
#include "TH1F.h"
#include "TH2F.h"
#include "TF1.h"
#include <iostream>
#include "AliAnalysisEtCuts.h"
#include "AliMCEvent.h"
#include "AliVEvent.h"
#include "AliStack.h"
#include "AliESDtrackCuts.h"
#include "TDatabasePDG.h"
#include "TParticle.h"
#include "Rtypes.h"
#include "AliPDG.h"

using namespace std;

ClassImp(AliAnalysisEtCommon);
//These are from the PDG database but by making them static the code is a bit more efficient and has no problems running with the plugin
//Cuts are defined in $ROOTSYS/etc/pdg_table.txt

Float_t AliAnalysisEtCommon::fgPionMass = 0.13957;
Float_t AliAnalysisEtCommon::fgKaonMass = 0.493677;
Float_t AliAnalysisEtCommon::fgProtonMass = 0.938272;
Float_t AliAnalysisEtCommon::fgElectronMass = 0.000510999;
Int_t AliAnalysisEtCommon::fgPiPlusCode = 211;
Int_t AliAnalysisEtCommon::fgPiMinusCode = -211;
Int_t AliAnalysisEtCommon::fgKPlusCode = 321;
Int_t AliAnalysisEtCommon::fgKMinusCode = -321;
Int_t AliAnalysisEtCommon::fgProtonCode = 2212;
Int_t AliAnalysisEtCommon::fgAntiProtonCode = -2212;
Int_t AliAnalysisEtCommon::fgLambdaCode = 3122;
Int_t AliAnalysisEtCommon::fgAntiLambdaCode = -3122;
Int_t AliAnalysisEtCommon::fgK0SCode = 310;
Int_t AliAnalysisEtCommon::fgOmegaCode = 3334;
Int_t AliAnalysisEtCommon::fgAntiOmegaCode = -3334;
Int_t AliAnalysisEtCommon::fgXi0Code = 3322;
Int_t AliAnalysisEtCommon::fgAntiXi0Code = -3322;
Int_t AliAnalysisEtCommon::fgXiCode = 3312;
Int_t AliAnalysisEtCommon::fgAntiXiCode = -3312;
Int_t AliAnalysisEtCommon::fgSigmaCode = 3112;
Int_t AliAnalysisEtCommon::fgAntiSigmaCode = -3112;
Int_t AliAnalysisEtCommon::fgK0LCode = 130;
Int_t AliAnalysisEtCommon::fgNeutronCode = 2112;
Int_t AliAnalysisEtCommon::fgAntiNeutronCode = -2112;
Int_t AliAnalysisEtCommon::fgEPlusCode = -11;
Int_t AliAnalysisEtCommon::fgEMinusCode = 11;
Int_t AliAnalysisEtCommon::fgMuPlusCode = -13;
Int_t AliAnalysisEtCommon::fgMuMinusCode = 13;
Int_t AliAnalysisEtCommon::fgGammaCode = 22;
Int_t AliAnalysisEtCommon::fgPi0Code = 111;
Int_t AliAnalysisEtCommon::fgEtaCode = 221;
Int_t AliAnalysisEtCommon::fgOmega0Code = 223;


Float_t AliAnalysisEtCommon::fgPtTPCCutOff = 0.15;
Float_t AliAnalysisEtCommon::fgPtITSCutOff = 0.10;

AliAnalysisEtCommon::AliAnalysisEtCommon() : TObject()
					   ,fHistogramNameSuffix("")
					   ,fCuts(0)
					   ,fDataSet(2010)
					   ,fEsdtrackCutsITSTPC(0)
					   ,fEsdtrackCutsTPC(0)
					   ,fEsdtrackCutsITS(0)
					   ,fK0PythiaD6T(0)
					   ,fLambdaPythiaD6T(0)
					   ,fAntiLambdaPythiaD6T(0)
					   ,fK0Data(0)
					   ,fLambdaData(0)
					   ,fAntiLambdaData(0)
					   ,fLambdaEnhancement(0)
					   ,fProtonEnhancement(0)
					   ,fCentralityMethod("V0M")
					   ,fNCentBins(21)
					   ,fCentBin(-1)
{//default constructor

}

AliAnalysisEtCommon::~AliAnalysisEtCommon()
{//destructor
  delete fCuts;
  delete fEsdtrackCutsITSTPC;
  delete fEsdtrackCutsITS;
  delete fEsdtrackCutsTPC;
  delete fK0PythiaD6T;
  delete fLambdaPythiaD6T;
  delete fAntiLambdaPythiaD6T;
  delete fK0Data;
  delete fLambdaData;
  delete fAntiLambdaData;
  delete fLambdaEnhancement;
  delete fProtonEnhancement;
}

Int_t AliAnalysisEtCommon::AnalyseEvent(AliVEvent *event)
{ //this line is basically here to eliminate a compiler warning that event is not used.  Making it a virtual function did not work with the plugin.
  cout << "This event has " << event->GetNumberOfTracks() << " tracks" << endl;
  ResetEventValues();
  return 0;
}


void AliAnalysisEtCommon::Init()
{// clear variables, set up cuts and PDG info
  //MyFunction * fptr = new MyFunction(....);  // create the user function class
  //TF1 * f = new TF1("f",fptr,&MyFunction::Evaluate,0,1,npar,"MyFunction","Evaluate");   // create TF1 class.
  AliAnalysisLevyPt *function = new AliAnalysisLevyPt();
  //parameter 0 = dNdy
  //parameter 1 = temp
  //parameter 2 = power
  if(fK0PythiaD6T) delete fK0PythiaD6T;
  if(fLambdaPythiaD6T) delete fLambdaPythiaD6T;
  if(fAntiLambdaPythiaD6T) delete fAntiLambdaPythiaD6T;
  if(fK0Data) delete fK0Data;
  if(fLambdaData) delete fLambdaData;
  if(fAntiLambdaData) delete fAntiLambdaData;
  fK0PythiaD6T = new TF1("K0PythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fLambdaPythiaD6T = new TF1("LambdaPythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fAntiLambdaPythiaD6T = new TF1("LambdaPythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fK0Data = new TF1("K0Data",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fLambdaData = new TF1("LambdaData",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fAntiLambdaData = new TF1("LambdaData",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
  fK0PythiaD6T->FixParameter(3,0.493677);
  fK0Data->FixParameter(3,0.493677);
  fLambdaPythiaD6T->FixParameter(3,1.115683);
  fAntiLambdaPythiaD6T->FixParameter(3,1.115683);
  fLambdaData->FixParameter(3,1.115683);
  fAntiLambdaData->FixParameter(3,1.115683);
  if(fDataSet==2009){
    //These data are from the ALICE 900 GeV p+p paper
    fK0PythiaD6T->SetParameter(0,0.1437);
    fK0PythiaD6T->SetParameter(1,0.1497);
    fK0PythiaD6T->SetParameter(2,6.94);
    fLambdaPythiaD6T->SetParameter(0,0.0213);
    fLambdaPythiaD6T->SetParameter(1,0.1315);
    fLambdaPythiaD6T->SetParameter(2,4.60);
    fAntiLambdaPythiaD6T->SetParameter(0,0.0213);
    fAntiLambdaPythiaD6T->SetParameter(1,0.1315);
    fAntiLambdaPythiaD6T->SetParameter(2,4.60);
    fK0Data->SetParameter(0,0.184);
    fK0Data->SetParameter(1,0.168);
    fK0Data->SetParameter(2,6.6);
    fLambdaData->SetParameter(0,0.048);
    fLambdaData->SetParameter(1,0.229);
    fLambdaData->SetParameter(2,10.8);
    fAntiLambdaData->SetParameter(0,0.047);
    fAntiLambdaData->SetParameter(1,0.210);
    fAntiLambdaData->SetParameter(2,9.2);
  }
  if(fDataSet==2010 ||fDataSet==20100 ){
    //These data are from the CMS analysis note on 7 TeV spectra
    //http://cdsweb.cern.ch/record/1279344/files/QCD-10-007-pas.pdf
    //Note the CMS parameterization of the Levy function differs from the ALICE parameterization by a constant.
    //CMS does not list the overall constant in their fit, the ratios of the dN/dy(y=0) is used.
    fK0PythiaD6T->SetParameter(0,0.72);
    fK0PythiaD6T->SetParameter(1,0.183);
    fK0PythiaD6T->SetParameter(2,7.41);
    fLambdaPythiaD6T->SetParameter(0,0.54);
    fLambdaPythiaD6T->SetParameter(1,0.216);
    fLambdaPythiaD6T->SetParameter(2,5.71);
    fAntiLambdaPythiaD6T->SetParameter(0,0.54);
    fAntiLambdaPythiaD6T->SetParameter(1,0.216);
    fAntiLambdaPythiaD6T->SetParameter(2,5.71);
    fK0Data->SetParameter(0,1.0);
    fK0Data->SetParameter(1,0.215);
    fK0Data->SetParameter(2,6.79);
    fLambdaData->SetParameter(0,1.0);
    fLambdaData->SetParameter(1,0.290);
    fLambdaData->SetParameter(2,9.28);
    fAntiLambdaData->SetParameter(0,1.0);
    fAntiLambdaData->SetParameter(1,0.290);
    fAntiLambdaData->SetParameter(2,9.28);
  }
  if(fLambdaEnhancement) delete fLambdaEnhancement;
  fLambdaEnhancement = new TF1("fLambdaEnhancement","([0]*pow(x,[1])*exp(-pow(x/[2],[3])))/([4]*exp(-pow([5]/x,[6]))+[7]*x)",0,50);
   fLambdaEnhancement->SetParameter(0,0.5630487);
   fLambdaEnhancement->SetParameter(1,1.388818);
   fLambdaEnhancement->SetParameter(2,3.954147);
   fLambdaEnhancement->SetParameter(3,3.443772);
   fLambdaEnhancement->SetParameter(4,2.844288);
   fLambdaEnhancement->SetParameter(5,2);
   fLambdaEnhancement->SetParameter(6,0.4747893);
   fLambdaEnhancement->SetParameter(7,-0.2250856);
   if(fProtonEnhancement) delete fProtonEnhancement;
   fProtonEnhancement = new TF1("fProtonEnhancement","[0]*pow(x,[1])*exp(-pow(x/[2],[3]))/([4]+[5]*x)",0,50);
   fProtonEnhancement->SetParameter(0,0.5630487*1.6);
   fProtonEnhancement->SetParameter(1,1.388818);
   fProtonEnhancement->SetParameter(2,3.954147/1.5);
   fProtonEnhancement->SetParameter(3,3.443772/2.5);
   fProtonEnhancement->SetParameter(4,0.5);
   fProtonEnhancement->SetParameter(5,-.03);
}

void AliAnalysisEtCommon::ResetEventValues()
{//Resets event values of et to zero
  
  if (!fCuts) { // some Init's needed
    cout << __FILE__ << ":" << __LINE__ << " : Init " << endl;
    if (!fCuts) {
      cout << " setting up Cuts " << endl;
      fCuts = new AliAnalysisEtCuts();
    }
  }
}


Float_t AliAnalysisEtCommon::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
  if(mass+1000<0.01){//if no mass given return default.  The default argument is -1000
    if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 || TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
      if(part->GetPDG(0)->PdgCode()==-2212 || part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
	//for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
	return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
      }
      if(part->GetPDG(0)->PdgCode()==2212 || part->GetPDG(0)->PdgCode()==2112){//proton or neutron
	//for nucleons we specifically want to return the kinetic energy only
	return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
      }
    }
    else{//otherwise go to the default
      return part->Energy()*TMath::Sin(part->Theta());
    }
  }
  else{//otherwise use the mass that was given
    return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
  }
  return 0.0;
}
Float_t AliAnalysisEtCommon::Et(Float_t p, Float_t theta, Int_t pid, Short_t charge) const {//function to calculate et in the same way as it would be calculated in a calorimeter
  if(pid==fgPiPlusCode || pid==fgPiMinusCode){//Nothing special for pions
    return TMath::Sqrt(p*p + fgPionMass*fgPionMass) * TMath::Sin(theta);
  }
  if(pid==fgKPlusCode || pid==fgKMinusCode){//Nothing special for kaons
    return TMath::Sqrt(p*p + fgKaonMass*fgKaonMass) * TMath::Sin(theta);
  }
  if(pid==fgEPlusCode || pid==fgEMinusCode){//Nothing special for electrons
    return TMath::Sqrt(p*p + fgElectronMass*fgElectronMass) * TMath::Sin(theta);
  }
  if(pid==fgProtonCode || pid==fgAntiProtonCode){//But for protons we must be careful...
    if(charge<0.0){//antiprotns: kinetic energy plus twice the rest mass
      return (TMath::Sqrt(p*p + fgProtonMass*fgProtonMass) + fgProtonMass) * TMath::Sin(theta);
    }
    if(charge>0.0){//antiprotns: kinetic energy only
      return (TMath::Sqrt(p*p + fgProtonMass*fgProtonMass) - fgProtonMass) * TMath::Sin(theta);
    }
  }
  cerr<<"Uh-oh!  Et not set properly!"<<endl;
  return 0.0;
}

Float_t AliAnalysisEtCommon::K0Weight(Float_t pt){
  Float_t data = fK0Data->Eval(pt);
  Float_t mc = fK0PythiaD6T->Eval(pt);
  return data/mc;
}
Float_t AliAnalysisEtCommon::LambdaWeight(Float_t pt){
  Float_t data = fLambdaData->Eval(pt);
  Float_t mc = fLambdaPythiaD6T->Eval(pt);
  return data/mc;
}
Float_t AliAnalysisEtCommon::AntiLambdaWeight(Float_t pt){
  Float_t data = fAntiLambdaData->Eval(pt);
  Float_t mc = fAntiLambdaPythiaD6T->Eval(pt);
  return data/mc;
}

Float_t AliAnalysisEtCommon::LambdaBaryonEnhancement(Float_t pt){
  if(pt<0.8) return 1.0;
  return fLambdaEnhancement->Eval(pt);
};//Function which gives the factor to reweigh a lambda or antilambda so it roughly matches baryon enhancement seen at RHIC
Float_t AliAnalysisEtCommon::ProtonBaryonEnhancement(Float_t pt){
  if(pt<0.8) return 1.0;
  return fProtonEnhancement->Eval(pt);
}//Function which gives the factor to reweigh a lambda or antilambda so it roughly matches baryon enhancement seen at RHIC
Commit	Line	Data
7d2d1773	1	//Created by Christine Nattrass, Rebecca Scott, Irakli Martashvili
	2	//University of Tennessee at Knoxville
	3	//
	4	// This class is designed for the analysis of the hadronic component of
	5	// transverse energy. It is used by AliAnalysisTaskHadEt.
	6	// This gets information about the hadronic component of the transverse energy
	7	// from tracks reconstructed in an event
	8	// it has daughters, AliAnalysisEtCommonMonteCarlo and
	9	// AliAnalysisEtCommonReconstructed which loop over either Monte Carlo data or
	10	// real data to get Et
	11
	12	#include "AliAnalysisEtCommon.h"
	13	#include "TMath.h"
	14	#include "TList.h"
	15	#include "TH1F.h"
	16	#include "TH2F.h"
964c8159	17	#include "TF1.h"
7d2d1773	18	#include <iostream>
	19	#include "AliAnalysisEtCuts.h"
	20	#include "AliMCEvent.h"
	21	#include "AliVEvent.h"
	22	#include "AliStack.h"
	23	#include "AliESDtrackCuts.h"
	24	#include "TDatabasePDG.h"
	25	#include "TParticle.h"
	26	#include "Rtypes.h"
	27	#include "AliPDG.h"
	28
	29	using namespace std;
	30
	31	ClassImp(AliAnalysisEtCommon);
	32	//These are from the PDG database but by making them static the code is a bit more efficient and has no problems running with the plugin
	33	//Cuts are defined in $ROOTSYS/etc/pdg_table.txt
	34
	35	Float_t AliAnalysisEtCommon::fgPionMass = 0.13957;
	36	Float_t AliAnalysisEtCommon::fgKaonMass = 0.493677;
	37	Float_t AliAnalysisEtCommon::fgProtonMass = 0.938272;
	38	Float_t AliAnalysisEtCommon::fgElectronMass = 0.000510999;
	39	Int_t AliAnalysisEtCommon::fgPiPlusCode = 211;
	40	Int_t AliAnalysisEtCommon::fgPiMinusCode = -211;
	41	Int_t AliAnalysisEtCommon::fgKPlusCode = 321;
	42	Int_t AliAnalysisEtCommon::fgKMinusCode = -321;
	43	Int_t AliAnalysisEtCommon::fgProtonCode = 2212;
	44	Int_t AliAnalysisEtCommon::fgAntiProtonCode = -2212;
	45	Int_t AliAnalysisEtCommon::fgLambdaCode = 3122;
	46	Int_t AliAnalysisEtCommon::fgAntiLambdaCode = -3122;
	47	Int_t AliAnalysisEtCommon::fgK0SCode = 310;
	48	Int_t AliAnalysisEtCommon::fgOmegaCode = 3334;
	49	Int_t AliAnalysisEtCommon::fgAntiOmegaCode = -3334;
	50	Int_t AliAnalysisEtCommon::fgXi0Code = 3322;
	51	Int_t AliAnalysisEtCommon::fgAntiXi0Code = -3322;
	52	Int_t AliAnalysisEtCommon::fgXiCode = 3312;
	53	Int_t AliAnalysisEtCommon::fgAntiXiCode = -3312;
	54	Int_t AliAnalysisEtCommon::fgSigmaCode = 3112;
	55	Int_t AliAnalysisEtCommon::fgAntiSigmaCode = -3112;
	56	Int_t AliAnalysisEtCommon::fgK0LCode = 130;
	57	Int_t AliAnalysisEtCommon::fgNeutronCode = 2112;
	58	Int_t AliAnalysisEtCommon::fgAntiNeutronCode = -2112;
	59	Int_t AliAnalysisEtCommon::fgEPlusCode = -11;
	60	Int_t AliAnalysisEtCommon::fgEMinusCode = 11;
	61	Int_t AliAnalysisEtCommon::fgMuPlusCode = -13;
	62	Int_t AliAnalysisEtCommon::fgMuMinusCode = 13;
	63	Int_t AliAnalysisEtCommon::fgGammaCode = 22;
	64	Int_t AliAnalysisEtCommon::fgPi0Code = 111;
	65	Int_t AliAnalysisEtCommon::fgEtaCode = 221;
	66	Int_t AliAnalysisEtCommon::fgOmega0Code = 223;
	67
	68
	69
	70	Float_t AliAnalysisEtCommon::fgPtTPCCutOff = 0.15;
	71	Float_t AliAnalysisEtCommon::fgPtITSCutOff = 0.10;
	72
0f6416f3	73	AliAnalysisEtCommon::AliAnalysisEtCommon() : TObject()
	74	,fHistogramNameSuffix("")
	75	,fCuts(0)
	76	,fDataSet(2010)
	77	,fEsdtrackCutsITSTPC(0)
	78	,fEsdtrackCutsTPC(0)
	79	,fEsdtrackCutsITS(0)
	80	,fK0PythiaD6T(0)
	81	,fLambdaPythiaD6T(0)
	82	,fAntiLambdaPythiaD6T(0)
	83	,fK0Data(0)
	84	,fLambdaData(0)
	85	,fAntiLambdaData(0)
	86	,fLambdaEnhancement(0)
	87	,fProtonEnhancement(0)
bf205f52	88	,fCentralityMethod("V0M")
c1854447	89	,fNCentBins(21)
b89c2382	90	,fCentBin(-1)
7d2d1773	91	{//default constructor
	92
	93	}
	94
	95	AliAnalysisEtCommon::~AliAnalysisEtCommon()
	96	{//destructor
	97	delete fCuts;
	98	delete fEsdtrackCutsITSTPC;
	99	delete fEsdtrackCutsITS;
	100	delete fEsdtrackCutsTPC;
964c8159	101	delete fK0PythiaD6T;
	102	delete fLambdaPythiaD6T;
	103	delete fAntiLambdaPythiaD6T;
	104	delete fK0Data;
	105	delete fLambdaData;
	106	delete fAntiLambdaData;
f43fc416	107	delete fLambdaEnhancement;
f43fc416	108	delete fProtonEnhancement;
7d2d1773	109	}
	110
	111	Int_t AliAnalysisEtCommon::AnalyseEvent(AliVEvent *event)
	112	{ //this line is basically here to eliminate a compiler warning that event is not used. Making it a virtual function did not work with the plugin.
	113	cout << "This event has " << event->GetNumberOfTracks() << " tracks" << endl;
	114	ResetEventValues();
	115	return 0;
	116	}
	117
	118
	119	void AliAnalysisEtCommon::Init()
	120	{// clear variables, set up cuts and PDG info
964c8159	121	//MyFunction * fptr = new MyFunction(....); // create the user function class
	122	//TF1 * f = new TF1("f",fptr,&MyFunction::Evaluate,0,1,npar,"MyFunction","Evaluate"); // create TF1 class.
	123	AliAnalysisLevyPt *function = new AliAnalysisLevyPt();
	124	//parameter 0 = dNdy
	125	//parameter 1 = temp
	126	//parameter 2 = power
ea331c5d	127	if(fK0PythiaD6T) delete fK0PythiaD6T;
	128	if(fLambdaPythiaD6T) delete fLambdaPythiaD6T;
	129	if(fAntiLambdaPythiaD6T) delete fAntiLambdaPythiaD6T;
	130	if(fK0Data) delete fK0Data;
	131	if(fLambdaData) delete fLambdaData;
	132	if(fAntiLambdaData) delete fAntiLambdaData;
836ce14a	133	fK0PythiaD6T = new TF1("K0PythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	134	fLambdaPythiaD6T = new TF1("LambdaPythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	135	fAntiLambdaPythiaD6T = new TF1("LambdaPythiaD6T",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	136	fK0Data = new TF1("K0Data",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	137	fLambdaData = new TF1("LambdaData",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	138	fAntiLambdaData = new TF1("LambdaData",function, &AliAnalysisLevyPt::Evaluate,0,50,4,"AliAnalysisLevyPt","Evaluate");
	139	fK0PythiaD6T->FixParameter(3,0.493677);
	140	fK0Data->FixParameter(3,0.493677);
	141	fLambdaPythiaD6T->FixParameter(3,1.115683);
	142	fAntiLambdaPythiaD6T->FixParameter(3,1.115683);
	143	fLambdaData->FixParameter(3,1.115683);
	144	fAntiLambdaData->FixParameter(3,1.115683);
964c8159	145	if(fDataSet==2009){
	146	//These data are from the ALICE 900 GeV p+p paper
	147	fK0PythiaD6T->SetParameter(0,0.1437);
	148	fK0PythiaD6T->SetParameter(1,0.1497);
	149	fK0PythiaD6T->SetParameter(2,6.94);
	150	fLambdaPythiaD6T->SetParameter(0,0.0213);
	151	fLambdaPythiaD6T->SetParameter(1,0.1315);
	152	fLambdaPythiaD6T->SetParameter(2,4.60);
	153	fAntiLambdaPythiaD6T->SetParameter(0,0.0213);
	154	fAntiLambdaPythiaD6T->SetParameter(1,0.1315);
	155	fAntiLambdaPythiaD6T->SetParameter(2,4.60);
	156	fK0Data->SetParameter(0,0.184);
	157	fK0Data->SetParameter(1,0.168);
	158	fK0Data->SetParameter(2,6.6);
	159	fLambdaData->SetParameter(0,0.048);
	160	fLambdaData->SetParameter(1,0.229);
	161	fLambdaData->SetParameter(2,10.8);
	162	fAntiLambdaData->SetParameter(0,0.047);
	163	fAntiLambdaData->SetParameter(1,0.210);
	164	fAntiLambdaData->SetParameter(2,9.2);
	165	}
f43fc416	166	if(fDataSet==2010 \|\|fDataSet==20100 ){
964c8159	167	//These data are from the CMS analysis note on 7 TeV spectra
	168	//http://cdsweb.cern.ch/record/1279344/files/QCD-10-007-pas.pdf
	169	//Note the CMS parameterization of the Levy function differs from the ALICE parameterization by a constant.
	170	//CMS does not list the overall constant in their fit, the ratios of the dN/dy(y=0) is used.
	171	fK0PythiaD6T->SetParameter(0,0.72);
	172	fK0PythiaD6T->SetParameter(1,0.183);
	173	fK0PythiaD6T->SetParameter(2,7.41);
	174	fLambdaPythiaD6T->SetParameter(0,0.54);
	175	fLambdaPythiaD6T->SetParameter(1,0.216);
	176	fLambdaPythiaD6T->SetParameter(2,5.71);
	177	fAntiLambdaPythiaD6T->SetParameter(0,0.54);
	178	fAntiLambdaPythiaD6T->SetParameter(1,0.216);
	179	fAntiLambdaPythiaD6T->SetParameter(2,5.71);
	180	fK0Data->SetParameter(0,1.0);
	181	fK0Data->SetParameter(1,0.215);
	182	fK0Data->SetParameter(2,6.79);
	183	fLambdaData->SetParameter(0,1.0);
	184	fLambdaData->SetParameter(1,0.290);
	185	fLambdaData->SetParameter(2,9.28);
	186	fAntiLambdaData->SetParameter(0,1.0);
	187	fAntiLambdaData->SetParameter(1,0.290);
	188	fAntiLambdaData->SetParameter(2,9.28);
	189	}
ea331c5d	190	if(fLambdaEnhancement) delete fLambdaEnhancement;
f43fc416	191	fLambdaEnhancement = new TF1("fLambdaEnhancement","([0]pow(x,[1])exp(-pow(x/[2],[3])))/([4]exp(-pow([5]/x,[6]))+[7]x)",0,50);
	192	fLambdaEnhancement->SetParameter(0,0.5630487);
	193	fLambdaEnhancement->SetParameter(1,1.388818);
	194	fLambdaEnhancement->SetParameter(2,3.954147);
	195	fLambdaEnhancement->SetParameter(3,3.443772);
	196	fLambdaEnhancement->SetParameter(4,2.844288);
	197	fLambdaEnhancement->SetParameter(5,2);
	198	fLambdaEnhancement->SetParameter(6,0.4747893);
	199	fLambdaEnhancement->SetParameter(7,-0.2250856);
ea331c5d	200	if(fProtonEnhancement) delete fProtonEnhancement;
f43fc416	201	fProtonEnhancement = new TF1("fProtonEnhancement","[0]pow(x,[1])exp(-pow(x/[2],[3]))/([4]+[5]*x)",0,50);
	202	fProtonEnhancement->SetParameter(0,0.5630487*1.6);
	203	fProtonEnhancement->SetParameter(1,1.388818);
	204	fProtonEnhancement->SetParameter(2,3.954147/1.5);
	205	fProtonEnhancement->SetParameter(3,3.443772/2.5);
	206	fProtonEnhancement->SetParameter(4,0.5);
	207	fProtonEnhancement->SetParameter(5,-.03);
7d2d1773	208	}
	209
	210	void AliAnalysisEtCommon::ResetEventValues()
	211	{//Resets event values of et to zero
	212
	213	if (!fCuts) { // some Init's needed
	214	cout << __FILE__ << ":" << __LINE__ << " : Init " << endl;
	215	if (!fCuts) {
	216	cout << " setting up Cuts " << endl;
	217	fCuts = new AliAnalysisEtCuts();
	218	}
	219	}
	220	}
	221
	222
	223	Float_t AliAnalysisEtCommon::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
	224	if(mass+1000<0.01){//if no mass given return default. The default argument is -1000
	225	if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 \|\| TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
	226	if(part->GetPDG(0)->PdgCode()==-2212 \|\| part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
	227	//for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
	228	return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
	229	}
	230	if(part->GetPDG(0)->PdgCode()==2212 \|\| part->GetPDG(0)->PdgCode()==2112){//proton or neutron
	231	//for nucleons we specifically want to return the kinetic energy only
	232	return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
	233	}
	234	}
	235	else{//otherwise go to the default
	236	return part->Energy()*TMath::Sin(part->Theta());
	237	}
	238	}
	239	else{//otherwise use the mass that was given
	240	return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
	241	}
	242	return 0.0;
	243	}
	244	Float_t AliAnalysisEtCommon::Et(Float_t p, Float_t theta, Int_t pid, Short_t charge) const {//function to calculate et in the same way as it would be calculated in a calorimeter
	245	if(pid==fgPiPlusCode \|\| pid==fgPiMinusCode){//Nothing special for pions
	246	return TMath::Sqrt(pp + fgPionMassfgPionMass) * TMath::Sin(theta);
	247	}
	248	if(pid==fgKPlusCode \|\| pid==fgKMinusCode){//Nothing special for kaons
	249	return TMath::Sqrt(pp + fgKaonMassfgKaonMass) * TMath::Sin(theta);
	250	}
	251	if(pid==fgEPlusCode \|\| pid==fgEMinusCode){//Nothing special for electrons
	252	return TMath::Sqrt(pp + fgElectronMassfgElectronMass) * TMath::Sin(theta);
	253	}
	254	if(pid==fgProtonCode \|\| pid==fgAntiProtonCode){//But for protons we must be careful...
	255	if(charge<0.0){//antiprotns: kinetic energy plus twice the rest mass
	256	return (TMath::Sqrt(pp + fgProtonMassfgProtonMass) + fgProtonMass) * TMath::Sin(theta);
	257	}
	258	if(charge>0.0){//antiprotns: kinetic energy only
	259	return (TMath::Sqrt(pp + fgProtonMassfgProtonMass) - fgProtonMass) * TMath::Sin(theta);
	260	}
	261	}
	262	cerr<<"Uh-oh! Et not set properly!"<<endl;
	263	return 0.0;
	264	}
964c8159	265
	266	Float_t AliAnalysisEtCommon::K0Weight(Float_t pt){
	267	Float_t data = fK0Data->Eval(pt);
	268	Float_t mc = fK0PythiaD6T->Eval(pt);
	269	return data/mc;
	270	}
	271	Float_t AliAnalysisEtCommon::LambdaWeight(Float_t pt){
	272	Float_t data = fLambdaData->Eval(pt);
	273	Float_t mc = fLambdaPythiaD6T->Eval(pt);
	274	return data/mc;
	275	}
	276	Float_t AliAnalysisEtCommon::AntiLambdaWeight(Float_t pt){
	277	Float_t data = fAntiLambdaData->Eval(pt);
	278	Float_t mc = fAntiLambdaPythiaD6T->Eval(pt);
	279	return data/mc;
	280	}
	281
f43fc416	282	Float_t AliAnalysisEtCommon::LambdaBaryonEnhancement(Float_t pt){
	283	if(pt<0.8) return 1.0;
	284	return fLambdaEnhancement->Eval(pt);
	285	};//Function which gives the factor to reweigh a lambda or antilambda so it roughly matches baryon enhancement seen at RHIC
	286	Float_t AliAnalysisEtCommon::ProtonBaryonEnhancement(Float_t pt){
	287	if(pt<0.8) return 1.0;
	288	return fProtonEnhancement->Eval(pt);
	289	}//Function which gives the factor to reweigh a lambda or antilambda so it roughly matches baryon enhancement seen at RHIC