[u/mrichter/AliRoot.git] / PWGHF / vertexingHF / AliAODRecoDecayHF3Prong.cxx

/**************************************************************************
 * Copyright(c) 1998-2006, 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.                  *
 **************************************************************************/

/* $Id$ */

/////////////////////////////////////////////////////////////
//
// Base class for AOD reconstructed heavy-flavour 3-prong decay
//
// Author: E.Bruna bruna@to.infn.it, F.Prino prino@to.infn.it
/////////////////////////////////////////////////////////////

#include <TDatabasePDG.h>
#include "AliAODRecoDecayHF.h"
#include "AliAODRecoDecayHF3Prong.h"
#include "AliAODTrack.h"
#include "AliESDtrack.h"
#include "AliVertexerTracks.h"
#include "TVector3.h"
#include "TLorentzVector.h"

ClassImp(AliAODRecoDecayHF3Prong)

//--------------------------------------------------------------------------
AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() :
  AliAODRecoDecayHF(), 
  fSigmaVert(0),
  fDist12toPrim(0),
  fDist23toPrim(0)
{
  //
  // Default Constructor
  //
}
//--------------------------------------------------------------------------
AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
						 Double_t *px,Double_t *py,Double_t *pz,
						 Double_t *d0,Double_t *d0err,
						 Double_t *dca, Double_t sigvert,
						 Double_t dist12,Double_t dist23,Short_t charge) :
  AliAODRecoDecayHF(vtx2,3,charge,px,py,pz,d0,d0err),
  fSigmaVert(sigvert),
  fDist12toPrim(dist12),
  fDist23toPrim(dist23)
{
  //
  // Constructor with AliAODVertex for decay vertex
  //
  SetDCAs(3,dca);
}
//--------------------------------------------------------------------------
AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
						 Double_t *d0,Double_t *d0err,
						 Double_t *dca, Double_t sigvert,
						 Double_t dist12,Double_t dist23, Short_t charge) :
  AliAODRecoDecayHF(vtx2,3,charge,d0,d0err),
  fSigmaVert(sigvert),
  fDist12toPrim(dist12),
  fDist23toPrim(dist23)
{
  //
  // Constructor with AliAODVertex for decay vertex and without prongs momenta
  //
  SetDCAs(3,dca);
}
//--------------------------------------------------------------------------
AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) :
  AliAODRecoDecayHF(source),
  fSigmaVert(source.fSigmaVert),
  fDist12toPrim(source.fDist12toPrim),
  fDist23toPrim(source.fDist23toPrim)
{
  //
  // Copy constructor
  //
}
//--------------------------------------------------------------------------
AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source)
{
  //
  // assignment operator
  //
  if(&source == this) return *this;

  AliAODRecoDecayHF::operator=(source);

  fDist12toPrim= source.fDist12toPrim;
  fDist23toPrim= source.fDist23toPrim;
  fSigmaVert= source.fSigmaVert;

  return *this;
}
//--------------------------------------------------------------------------
Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts)
  const {
//
// This function compares the Dplus with a set of cuts:
//
// cuts[0] = inv. mass half width [GeV]   
// cuts[1] = pTK [GeV/c]
// cuts[2] = pTPi [GeV/c]
// cuts[3] = d0K [cm]   lower limit!
// cuts[4] = d0Pi [cm]  lower limit!
// cuts[5] = dist12 (cm)
// cuts[6] = sigmavert (cm)
// cuts[7] = dist prim-sec (cm)
// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
// cuts[9] = cosThetaPoint
// cuts[10] = Sum d0^2 (cm^2)
// cuts[11] = dca cut (cm)
//
// If candidate Dplus does not pass the cuts return kFALSE
//

  Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass();
  Double_t mDplus=InvMassDplus();
  if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE;
  //single track
  if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon
  if(TMath::Abs(PtProng(0)) < cuts[2] || TMath::Abs(Getd0Prong(0))<cuts[4])return kFALSE;//Pion1
  if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2

  //DCA
  for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;

  //2track cuts
  if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
  if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE;

  //sec vert
  if(fSigmaVert>cuts[6])return kFALSE;

  if(DecayLength()<cuts[7])return kFALSE;

  if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
  if(CosPointingAngle()   < cuts[9])return kFALSE;
  Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
  if(sum2<cuts[10])return kFALSE;
  return kTRUE;
}
//--------------------------------------------------------------------------
Bool_t AliAODRecoDecayHF3Prong::SelectDs(const Double_t *cuts,Int_t &okDsKKpi,Int_t &okDspiKK, Int_t &okMassPhi, Int_t &okMassK0star)
  const {
//
// This function compares the Ds with a set of cuts 
// (same variables as D+, for now)
//
// cuts[0] = inv. mass half width [GeV]   
// cuts[1] = pTK [GeV/c]
// cuts[2] = pTPi [GeV/c]
// cuts[3] = d0K [cm]   lower limit!
// cuts[4] = d0Pi [cm]  lower limit!
// cuts[5] = dist12 (cm)
// cuts[6] = sigmavert (cm)
// cuts[7] = dist prim-sec (cm)
// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
// cuts[9] = cosThetaPoint
// cuts[10] = Sum d0^2 (cm^2)
// cuts[11] = dca cut (cm)
// cuts[12] = max. inv. mass difference(Mphi-MKK) [GeV] 
// cuts[13] = max. inv. mass difference(MK0*-MKpi) [GeV] 
//
// If candidate Ds does not pass the cuts return kFALSE
//
  Double_t mDsKKpi,mDspiKK;
  okDsKKpi=1; okDspiKK=1;
  okMassPhi=0; okMassK0star=0;

  Double_t mDsPDG = TDatabasePDG::Instance()->GetParticle(431)->Mass();

  mDsKKpi=InvMassDsKKpi();
  mDspiKK=InvMassDspiKK();

  if(TMath::Abs(mDsKKpi-mDsPDG)>cuts[0]) okDsKKpi = 0;
  if(TMath::Abs(mDspiKK-mDsPDG)>cuts[0]) okDspiKK = 0;
  if(!okDsKKpi && !okDspiKK) return kFALSE;

  //single track
  if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Kaon1
  if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon2
  if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion

  // cuts on resonant decays (via Phi or K0*)
  Double_t mPhiPDG = TDatabasePDG::Instance()->GetParticle(333)->Mass();
  Double_t mK0starPDG = TDatabasePDG::Instance()->GetParticle(313)->Mass();
  if(okDsKKpi){
    Double_t mass01phi=InvMass2Prongs(0,1,321,321);
    Double_t mass12K0s=InvMass2Prongs(1,2,321,211);
    if(TMath::Abs(mass01phi-mPhiPDG)<cuts[12]) okMassPhi=1;
    if(TMath::Abs(mass12K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
    if(!okMassPhi && !okMassK0star) okDsKKpi=kFALSE;
  }
  if(okDspiKK){
    Double_t mass01K0s=InvMass2Prongs(0,1,211,321);
    Double_t mass12phi=InvMass2Prongs(1,2,321,321);
    if(TMath::Abs(mass01K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
    if(TMath::Abs(mass12phi-mPhiPDG)<cuts[12]) okMassPhi=1;
    if(!okMassPhi && !okMassK0star) okDspiKK=kFALSE;
  }
  if(!okDsKKpi && !okDspiKK) return kFALSE;


  //DCA
  for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;

  //2track cuts
  if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;

  //sec vert
  if(fSigmaVert>cuts[6])return kFALSE;

  if(DecayLength()<cuts[7])return kFALSE;

  if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
  if(CosPointingAngle()   < cuts[9])return kFALSE;
  Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
  if(sum2<cuts[10])return kFALSE;

  return kTRUE;
}
//--------------------------------------------------------------------------
Bool_t AliAODRecoDecayHF3Prong::SelectLc(const Double_t *cuts,Int_t &okLcpKpi,Int_t &okLcpiKp)
  const {
//
// This function compares the Lc with a set of cuts 
// (same variables as D+, for now)
//
// cuts[0] = inv. mass half width [GeV]   
// cuts[1] = pTP [GeV/c]
// cuts[2] = pTPi and pTK [GeV/c]
// cuts[3] = d0P [cm]   lower limit!
// cuts[4] = d0Pi and d0K [cm]  lower limit!
// cuts[5] = dist12 (cm)
// cuts[6] = sigmavert (cm)
// cuts[7] = dist prim-sec (cm)
// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
// cuts[9] = cosThetaPoint
// cuts[10] = Sum d0^2 (cm^2)
// cuts[11] = dca cut (cm)
//
// If candidate Lc does not pass the cuts return kFALSE
//
  Double_t mLcpKpi,mLcpiKp;
  okLcpKpi=1; okLcpiKp=1;

  Double_t mLcPDG = TDatabasePDG::Instance()->GetParticle(4122)->Mass();

  mLcpKpi=InvMassLcpKpi();
  mLcpiKp=InvMassLcpiKp();

  if(TMath::Abs(mLcpKpi-mLcPDG)>cuts[0]) okLcpKpi = 0;
  if(TMath::Abs(mLcpiKp-mLcPDG)>cuts[0]) okLcpiKp = 0;
  if(!okLcpKpi && !okLcpiKp) return kFALSE;

  //single track
  if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Proton
  if(TMath::Abs(PtProng(1)) < cuts[2] || TMath::Abs(Getd0Prong(1))<cuts[4])return kFALSE;//Kaon
  if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion

  //DCA
  for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;

  //2track cuts
  if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
  if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE;

  //sec vert
  if(fSigmaVert>cuts[6])return kFALSE;

  if(DecayLength()<cuts[7])return kFALSE;

  if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
  if(CosPointingAngle()   < cuts[9])return kFALSE;
  Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
  if(sum2<cuts[10])return kFALSE;

  return kTRUE;
}


//----------------------------------------------------------------------
Double_t AliAODRecoDecayHF3Prong::CosPiKPhiRFrame(Int_t option)
const {
  // computes cosine of angle between pi and K in the phi rest frame

 Int_t indexPi;
 Int_t indexK1;
 Int_t indexK2;

  if (option==0){ //KKpi
    indexPi=2;
    indexK1=0;
    indexK2=1;
  }else{   //piKK
    indexPi=0;
    indexK1=1;
    indexK2=2;
  }
          
  Double_t ePhi=EProng(indexK1,321)+EProng(indexK2,321);
  Double_t pxPhi=PxProng(indexK1)+PxProng(indexK2);
  Double_t pyPhi=PyProng(indexK1)+PyProng(indexK2);
  Double_t pzPhi=PzProng(indexK1)+PzProng(indexK2);
  Double_t bxPhi=pxPhi/ePhi;
  Double_t byPhi=pyPhi/ePhi;
  Double_t bzPhi=pzPhi/ePhi;
 
  TVector3 vecK1Phiframe;
  TLorentzVector* vecK1=new TLorentzVector(PxProng(indexK1),PyProng(indexK1),PzProng(indexK1),EProng(indexK1,321));
  vecK1->Boost(-bxPhi,-byPhi,-bzPhi);                                          
  vecK1->Boost(vecK1Phiframe); 
  vecK1Phiframe=vecK1->BoostVector();   
    
  TVector3 vecPiPhiframe;
  TLorentzVector* vecPi=new TLorentzVector(PxProng(indexPi),PyProng(indexPi),PzProng(indexPi),EProng(indexPi,211));
  vecPi->Boost(-bxPhi,-byPhi,-bzPhi);                                         
  vecPi->Boost(vecPiPhiframe); 
  vecPiPhiframe=vecPi->BoostVector();   
                                                             
  Double_t innera=vecPiPhiframe.Dot(vecK1Phiframe);
  Double_t norm1a=TMath::Sqrt(vecPiPhiframe.Dot(vecPiPhiframe));
  Double_t norm2a=TMath::Sqrt(vecK1Phiframe.Dot(vecK1Phiframe));
  Double_t cosK1PhiFrame=innera/(norm1a*norm2a);                                                      

  return cosK1PhiFrame;

}

//----------------------------------------------------------------------
Double_t AliAODRecoDecayHF3Prong::CosPiDsLabFrame(Int_t option)
const {
  // computes cosine of angle between pi and Ds in the Ds rest frame

 Int_t indexPi;

  if (option==0){ //KKpi
    indexPi=2;
  }else{ //piKK
    indexPi=0;
  }

 
  Double_t bxD=Px()/E(431);
  Double_t byD=Py()/E(431);
  Double_t bzD=Pz()/E(431);

  TVector3 piDsframe;
  TLorentzVector* vecPi=new TLorentzVector(PxProng(indexPi),PyProng(indexPi),PzProng(indexPi),EProng(indexPi,211));  
  vecPi->Boost(-bxD,-byD,-bzD);                                                
  vecPi->Boost(piDsframe); 
  piDsframe=vecPi->BoostVector();   
 
  TVector3 vecDs(Px(),Py(),Pz());
      
  Double_t inner=vecDs.Dot(piDsframe);
  Double_t norm1=TMath::Sqrt(vecDs.Dot(vecDs));
  Double_t norm2=TMath::Sqrt(piDsframe.Dot(piDsframe));
  Double_t cosPiDsFrame=inner/(norm1*norm2);	
 

  return cosPiDsFrame;

}

//----------------------------------------------------------------------
Double_t AliAODRecoDecayHF3Prong::ComputeSigmaVert(const AliAODEvent* aod) const{
  // computes track dispersion around secondary vertex starting from tracks

  AliVertexerTracks vertexer(aod->GetMagneticField());
  Double_t pos[3],cov[6];
  AliAODVertex* aodV=aod->GetPrimaryVertex();
  aodV->GetXYZ(pos);
  aodV->GetCovarianceMatrix(cov);
  Double_t chi2=aodV->GetChi2();
  Int_t nC=aodV->GetNContributors();
  AliESDVertex vprim(pos,cov,chi2,nC);
  vertexer.SetVtxStart(&vprim);
  TObjArray threeTrackArray(3);

  for(Int_t iDau=0; iDau<GetNDaughters(); iDau++){
    AliVTrack* at=(AliVTrack*)GetDaughter(iDau);
    threeTrackArray.AddAt(new AliESDtrack(at),iDau);
  }

  AliESDVertex* secVert=vertexer.VertexForSelectedESDTracks(&threeTrackArray,kFALSE,kTRUE,kFALSE);
  Double_t disp=secVert->GetDispersion();
  
  threeTrackArray.Delete();
  delete secVert;
  return disp;
  
}
Commit	Line	Data
3244eeed	1	/**************************************************************************
	2	* Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
27de2dfb	16	/* $Id$ */
27de2dfb	17
3244eeed	18	/////////////////////////////////////////////////////////////
	19	//
	20	// Base class for AOD reconstructed heavy-flavour 3-prong decay
	21	//
	22	// Author: E.Bruna bruna@to.infn.it, F.Prino prino@to.infn.it
	23	/////////////////////////////////////////////////////////////
	24
	25	#include <TDatabasePDG.h>
	26	#include "AliAODRecoDecayHF.h"
	27	#include "AliAODRecoDecayHF3Prong.h"
16156b6d	28	#include "AliAODTrack.h"
e0fb900a	29	#include "AliESDtrack.h"
e0fb900a	30	#include "AliVertexerTracks.h"
2e153422	31	#include "TVector3.h"
2e153422	32	#include "TLorentzVector.h"
3244eeed	33
	34	ClassImp(AliAODRecoDecayHF3Prong)
	35
	36	//--------------------------------------------------------------------------
	37	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() :
	38	AliAODRecoDecayHF(),
	39	fSigmaVert(0),
	40	fDist12toPrim(0),
	41	fDist23toPrim(0)
	42	{
	43	//
	44	// Default Constructor
	45	//
	46	}
	47	//--------------------------------------------------------------------------
	48	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
	49	Double_t px,Double_t py,Double_t *pz,
	50	Double_t d0,Double_t d0err,
	51	Double_t *dca, Double_t sigvert,
	52	Double_t dist12,Double_t dist23,Short_t charge) :
	53	AliAODRecoDecayHF(vtx2,3,charge,px,py,pz,d0,d0err),
	54	fSigmaVert(sigvert),
	55	fDist12toPrim(dist12),
	56	fDist23toPrim(dist23)
	57	{
	58	//
	59	// Constructor with AliAODVertex for decay vertex
	60	//
6185d025	61	SetDCAs(3,dca);
3244eeed	62	}
	63	//--------------------------------------------------------------------------
	64	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
	65	Double_t d0,Double_t d0err,
	66	Double_t *dca, Double_t sigvert,
	67	Double_t dist12,Double_t dist23, Short_t charge) :
	68	AliAODRecoDecayHF(vtx2,3,charge,d0,d0err),
	69	fSigmaVert(sigvert),
	70	fDist12toPrim(dist12),
	71	fDist23toPrim(dist23)
	72	{
	73	//
	74	// Constructor with AliAODVertex for decay vertex and without prongs momenta
	75	//
6185d025	76	SetDCAs(3,dca);
3244eeed	77	}
	78	//--------------------------------------------------------------------------
	79	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) :
	80	AliAODRecoDecayHF(source),
	81	fSigmaVert(source.fSigmaVert),
	82	fDist12toPrim(source.fDist12toPrim),
	83	fDist23toPrim(source.fDist23toPrim)
	84	{
	85	//
	86	// Copy constructor
	87	//
	88	}
	89	//--------------------------------------------------------------------------
	90	AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source)
	91	{
	92	//
	93	// assignment operator
	94	//
	95	if(&source == this) return *this;
dcb444c9	96
	97	AliAODRecoDecayHF::operator=(source);
	98
3244eeed	99	fDist12toPrim= source.fDist12toPrim;
	100	fDist23toPrim= source.fDist23toPrim;
	101	fSigmaVert= source.fSigmaVert;
dcb444c9	102
3244eeed	103	return *this;
	104	}
	105	//--------------------------------------------------------------------------
	106	Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts)
	107	const {
	108	//
	109	// This function compares the Dplus with a set of cuts:
	110	//
	111	// cuts[0] = inv. mass half width [GeV]
	112	// cuts[1] = pTK [GeV/c]
	113	// cuts[2] = pTPi [GeV/c]
	114	// cuts[3] = d0K [cm] lower limit!
	115	// cuts[4] = d0Pi [cm] lower limit!
	116	// cuts[5] = dist12 (cm)
	117	// cuts[6] = sigmavert (cm)
	118	// cuts[7] = dist prim-sec (cm)
	119	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	120	// cuts[9] = cosThetaPoint
	121	// cuts[10] = Sum d0^2 (cm^2)
	122	// cuts[11] = dca cut (cm)
	123	//
	124	// If candidate Dplus does not pass the cuts return kFALSE
	125	//
	126
	127	Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass();
	128	Double_t mDplus=InvMassDplus();
	129	if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE;
	130	//single track
	131	if(TMath::Abs(PtProng(1)) < cuts[1] \|\| TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon
	132	if(TMath::Abs(PtProng(0)) < cuts[2] \|\| TMath::Abs(Getd0Prong(0))<cuts[4])return kFALSE;//Pion1
	133	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2
	134
	135	//DCA
81679460	136	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
3244eeed	137
	138	//2track cuts
	139	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
	140	if(Getd0Prong(0)Getd0Prong(1)<0. && Getd0Prong(2)Getd0Prong(1)<0.)return kFALSE;
	141
	142	//sec vert
	143	if(fSigmaVert>cuts[6])return kFALSE;
	144
	145	if(DecayLength()<cuts[7])return kFALSE;
	146
	147	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	148	if(CosPointingAngle() < cuts[9])return kFALSE;
	149	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	150	if(sum2<cuts[10])return kFALSE;
	151	return kTRUE;
	152	}
79250a2b	153	//--------------------------------------------------------------------------
9fce5365	154	Bool_t AliAODRecoDecayHF3Prong::SelectDs(const Double_t *cuts,Int_t &okDsKKpi,Int_t &okDspiKK, Int_t &okMassPhi, Int_t &okMassK0star)
79250a2b	155	const {
79250a2b	156	//
6ea608bf	157	// This function compares the Ds with a set of cuts
6ea608bf	158	// (same variables as D+, for now)
79250a2b	159	//
79250a2b	160	// cuts[0] = inv. mass half width [GeV]
6ea608bf	161	// cuts[1] = pTK [GeV/c]
	162	// cuts[2] = pTPi [GeV/c]
	163	// cuts[3] = d0K [cm] lower limit!
	164	// cuts[4] = d0Pi [cm] lower limit!
	165	// cuts[5] = dist12 (cm)
	166	// cuts[6] = sigmavert (cm)
	167	// cuts[7] = dist prim-sec (cm)
	168	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	169	// cuts[9] = cosThetaPoint
	170	// cuts[10] = Sum d0^2 (cm^2)
	171	// cuts[11] = dca cut (cm)
9fce5365	172	// cuts[12] = max. inv. mass difference(Mphi-MKK) [GeV]
9fce5365	173	// cuts[13] = max. inv. mass difference(MK0*-MKpi) [GeV]
79250a2b	174	//
	175	// If candidate Ds does not pass the cuts return kFALSE
	176	//
	177	Double_t mDsKKpi,mDspiKK;
	178	okDsKKpi=1; okDspiKK=1;
9fce5365	179	okMassPhi=0; okMassK0star=0;
79250a2b	180
	181	Double_t mDsPDG = TDatabasePDG::Instance()->GetParticle(431)->Mass();
	182
	183	mDsKKpi=InvMassDsKKpi();
	184	mDspiKK=InvMassDspiKK();
	185
	186	if(TMath::Abs(mDsKKpi-mDsPDG)>cuts[0]) okDsKKpi = 0;
	187	if(TMath::Abs(mDspiKK-mDsPDG)>cuts[0]) okDspiKK = 0;
	188	if(!okDsKKpi && !okDspiKK) return kFALSE;
	189
6ea608bf	190	//single track
	191	if(TMath::Abs(PtProng(0)) < cuts[1] \|\| TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Kaon1
	192	if(TMath::Abs(PtProng(1)) < cuts[1] \|\| TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon2
81679460	193	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion
6ea608bf	194
81679460	195	// cuts on resonant decays (via Phi or K0*)
81679460	196	Double_t mPhiPDG = TDatabasePDG::Instance()->GetParticle(333)->Mass();
9fce5365	197	Double_t mK0starPDG = TDatabasePDG::Instance()->GetParticle(313)->Mass();
	198	if(okDsKKpi){
	199	Double_t mass01phi=InvMass2Prongs(0,1,321,321);
	200	Double_t mass12K0s=InvMass2Prongs(1,2,321,211);
	201	if(TMath::Abs(mass01phi-mPhiPDG)<cuts[12]) okMassPhi=1;
	202	if(TMath::Abs(mass12K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
	203	if(!okMassPhi && !okMassK0star) okDsKKpi=kFALSE;
	204	}
	205	if(okDspiKK){
	206	Double_t mass01K0s=InvMass2Prongs(0,1,211,321);
	207	Double_t mass12phi=InvMass2Prongs(1,2,321,321);
	208	if(TMath::Abs(mass01K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
	209	if(TMath::Abs(mass12phi-mPhiPDG)<cuts[12]) okMassPhi=1;
	210	if(!okMassPhi && !okMassK0star) okDspiKK=kFALSE;
	211	}
	212	if(!okDsKKpi && !okDspiKK) return kFALSE;
	213
	214
	215
81679460	216
6ea608bf	217	//DCA
81679460	218	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
6ea608bf	219
	220	//2track cuts
	221	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
6ea608bf	222
	223	//sec vert
	224	if(fSigmaVert>cuts[6])return kFALSE;
	225
	226	if(DecayLength()<cuts[7])return kFALSE;
	227
	228	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	229	if(CosPointingAngle() < cuts[9])return kFALSE;
	230	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	231	if(sum2<cuts[10])return kFALSE;
	232
79250a2b	233	return kTRUE;
	234	}
	235	//--------------------------------------------------------------------------
	236	Bool_t AliAODRecoDecayHF3Prong::SelectLc(const Double_t *cuts,Int_t &okLcpKpi,Int_t &okLcpiKp)
	237	const {
	238	//
6ea608bf	239	// This function compares the Lc with a set of cuts
6ea608bf	240	// (same variables as D+, for now)
79250a2b	241	//
79250a2b	242	// cuts[0] = inv. mass half width [GeV]
6ea608bf	243	// cuts[1] = pTP [GeV/c]
	244	// cuts[2] = pTPi and pTK [GeV/c]
	245	// cuts[3] = d0P [cm] lower limit!
	246	// cuts[4] = d0Pi and d0K [cm] lower limit!
	247	// cuts[5] = dist12 (cm)
	248	// cuts[6] = sigmavert (cm)
	249	// cuts[7] = dist prim-sec (cm)
	250	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	251	// cuts[9] = cosThetaPoint
	252	// cuts[10] = Sum d0^2 (cm^2)
	253	// cuts[11] = dca cut (cm)
79250a2b	254	//
	255	// If candidate Lc does not pass the cuts return kFALSE
	256	//
	257	Double_t mLcpKpi,mLcpiKp;
	258	okLcpKpi=1; okLcpiKp=1;
	259
	260	Double_t mLcPDG = TDatabasePDG::Instance()->GetParticle(4122)->Mass();
	261
	262	mLcpKpi=InvMassLcpKpi();
	263	mLcpiKp=InvMassLcpiKp();
	264
	265	if(TMath::Abs(mLcpKpi-mLcPDG)>cuts[0]) okLcpKpi = 0;
	266	if(TMath::Abs(mLcpiKp-mLcPDG)>cuts[0]) okLcpiKp = 0;
	267	if(!okLcpKpi && !okLcpiKp) return kFALSE;
	268
6ea608bf	269	//single track
	270	if(TMath::Abs(PtProng(0)) < cuts[1] \|\| TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Proton
	271	if(TMath::Abs(PtProng(1)) < cuts[2] \|\| TMath::Abs(Getd0Prong(1))<cuts[4])return kFALSE;//Kaon
	272	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion
	273
	274	//DCA
81679460	275	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
6ea608bf	276
	277	//2track cuts
	278	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
	279	if(Getd0Prong(0)Getd0Prong(1)<0. && Getd0Prong(2)Getd0Prong(1)<0.)return kFALSE;
	280
	281	//sec vert
	282	if(fSigmaVert>cuts[6])return kFALSE;
	283
	284	if(DecayLength()<cuts[7])return kFALSE;
	285
	286	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	287	if(CosPointingAngle() < cuts[9])return kFALSE;
	288	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	289	if(sum2<cuts[10])return kFALSE;
	290
79250a2b	291	return kTRUE;
79250a2b	292	}
2e153422	293
	294
	295	//----------------------------------------------------------------------
	296	Double_t AliAODRecoDecayHF3Prong::CosPiKPhiRFrame(Int_t option)
	297	const {
	298	// computes cosine of angle between pi and K in the phi rest frame
	299
	300	Int_t indexPi;
	301	Int_t indexK1;
	302	Int_t indexK2;
	303
	304	if (option==0){ //KKpi
	305	indexPi=2;
	306	indexK1=0;
	307	indexK2=1;
cbe0066f	308	}else{ //piKK
2e153422	309	indexPi=0;
	310	indexK1=1;
	311	indexK2=2;
	312	}
	313
	314	Double_t ePhi=EProng(indexK1,321)+EProng(indexK2,321);
	315	Double_t pxPhi=PxProng(indexK1)+PxProng(indexK2);
	316	Double_t pyPhi=PyProng(indexK1)+PyProng(indexK2);
	317	Double_t pzPhi=PzProng(indexK1)+PzProng(indexK2);
	318	Double_t bxPhi=pxPhi/ePhi;
	319	Double_t byPhi=pyPhi/ePhi;
	320	Double_t bzPhi=pzPhi/ePhi;
	321
	322	TVector3 vecK1Phiframe;
	323	TLorentzVector* vecK1=new TLorentzVector(PxProng(indexK1),PyProng(indexK1),PzProng(indexK1),EProng(indexK1,321));
	324	vecK1->Boost(-bxPhi,-byPhi,-bzPhi);
	325	vecK1->Boost(vecK1Phiframe);
	326	vecK1Phiframe=vecK1->BoostVector();
	327
	328	TVector3 vecPiPhiframe;
	329	TLorentzVector* vecPi=new TLorentzVector(PxProng(indexPi),PyProng(indexPi),PzProng(indexPi),EProng(indexPi,211));
	330	vecPi->Boost(-bxPhi,-byPhi,-bzPhi);
	331	vecPi->Boost(vecPiPhiframe);
	332	vecPiPhiframe=vecPi->BoostVector();
	333
	334	Double_t innera=vecPiPhiframe.Dot(vecK1Phiframe);
	335	Double_t norm1a=TMath::Sqrt(vecPiPhiframe.Dot(vecPiPhiframe));
	336	Double_t norm2a=TMath::Sqrt(vecK1Phiframe.Dot(vecK1Phiframe));
	337	Double_t cosK1PhiFrame=innera/(norm1a*norm2a);
	338
	339	return cosK1PhiFrame;
	340
	341	}
	342
	343	//----------------------------------------------------------------------
	344	Double_t AliAODRecoDecayHF3Prong::CosPiDsLabFrame(Int_t option)
	345	const {
	346	// computes cosine of angle between pi and Ds in the Ds rest frame
	347
	348	Int_t indexPi;
2e153422	349
	350	if (option==0){ //KKpi
	351	indexPi=2;
cbe0066f	352	}else{ //piKK
2e153422	353	indexPi=0;
2e153422	354	}
	355
	356
	357	Double_t bxD=Px()/E(431);
	358	Double_t byD=Py()/E(431);
	359	Double_t bzD=Pz()/E(431);
	360
	361	TVector3 piDsframe;
	362	TLorentzVector* vecPi=new TLorentzVector(PxProng(indexPi),PyProng(indexPi),PzProng(indexPi),EProng(indexPi,211));
	363	vecPi->Boost(-bxD,-byD,-bzD);
	364	vecPi->Boost(piDsframe);
	365	piDsframe=vecPi->BoostVector();
	366
	367	TVector3 vecDs(Px(),Py(),Pz());
	368
	369	Double_t inner=vecDs.Dot(piDsframe);
	370	Double_t norm1=TMath::Sqrt(vecDs.Dot(vecDs));
	371	Double_t norm2=TMath::Sqrt(piDsframe.Dot(piDsframe));
	372	Double_t cosPiDsFrame=inner/(norm1*norm2);
	373
	374
	375	return cosPiDsFrame;
	376
	377	}
	378
e0fb900a	379	//----------------------------------------------------------------------
5ba83ee1	380	Double_t AliAODRecoDecayHF3Prong::ComputeSigmaVert(const AliAODEvent* aod) const{
e0fb900a	381	// computes track dispersion around secondary vertex starting from tracks
	382
	383	AliVertexerTracks vertexer(aod->GetMagneticField());
	384	Double_t pos[3],cov[6];
	385	AliAODVertex* aodV=aod->GetPrimaryVertex();
	386	aodV->GetXYZ(pos);
	387	aodV->GetCovarianceMatrix(cov);
	388	Double_t chi2=aodV->GetChi2();
	389	Int_t nC=aodV->GetNContributors();
	390	AliESDVertex vprim(pos,cov,chi2,nC);
	391	vertexer.SetVtxStart(&vprim);
	392	TObjArray threeTrackArray(3);
	393
	394	for(Int_t iDau=0; iDau<GetNDaughters(); iDau++){
	395	AliVTrack* at=(AliVTrack*)GetDaughter(iDau);
	396	threeTrackArray.AddAt(new AliESDtrack(at),iDau);
	397	}
	398
	399	AliESDVertex* secVert=vertexer.VertexForSelectedESDTracks(&threeTrackArray,kFALSE,kTRUE,kFALSE);
	400	Double_t disp=secVert->GetDispersion();
	401
	402	threeTrackArray.Delete();
	403	delete secVert;
	404	return disp;
	405
	406	}