[u/mrichter/AliRoot.git] / PWG3 / 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 "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;
  }
 
  if (option==1){ //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;
 Int_t indexK1;
 Int_t indexK2;

  if (option==0){ //KKpi
    indexPi=2;
    indexK1=0;
    indexK2=1;
  }
 
  if (option==1){ //piKK
    indexPi=0;
    indexK1=1;
    indexK2=2;
  }

 
  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;

}
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"
2e153422	29	#include "TVector3.h"
2e153422	30	#include "TLorentzVector.h"
3244eeed	31
	32	ClassImp(AliAODRecoDecayHF3Prong)
	33
	34	//--------------------------------------------------------------------------
	35	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() :
	36	AliAODRecoDecayHF(),
	37	fSigmaVert(0),
	38	fDist12toPrim(0),
	39	fDist23toPrim(0)
	40	{
	41	//
	42	// Default Constructor
	43	//
	44	}
	45	//--------------------------------------------------------------------------
	46	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
	47	Double_t px,Double_t py,Double_t *pz,
	48	Double_t d0,Double_t d0err,
	49	Double_t *dca, Double_t sigvert,
	50	Double_t dist12,Double_t dist23,Short_t charge) :
	51	AliAODRecoDecayHF(vtx2,3,charge,px,py,pz,d0,d0err),
	52	fSigmaVert(sigvert),
	53	fDist12toPrim(dist12),
	54	fDist23toPrim(dist23)
	55	{
	56	//
	57	// Constructor with AliAODVertex for decay vertex
	58	//
6185d025	59	SetDCAs(3,dca);
3244eeed	60	}
	61	//--------------------------------------------------------------------------
	62	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
	63	Double_t d0,Double_t d0err,
	64	Double_t *dca, Double_t sigvert,
	65	Double_t dist12,Double_t dist23, Short_t charge) :
	66	AliAODRecoDecayHF(vtx2,3,charge,d0,d0err),
	67	fSigmaVert(sigvert),
	68	fDist12toPrim(dist12),
	69	fDist23toPrim(dist23)
	70	{
	71	//
	72	// Constructor with AliAODVertex for decay vertex and without prongs momenta
	73	//
6185d025	74	SetDCAs(3,dca);
3244eeed	75	}
	76	//--------------------------------------------------------------------------
	77	AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) :
	78	AliAODRecoDecayHF(source),
	79	fSigmaVert(source.fSigmaVert),
	80	fDist12toPrim(source.fDist12toPrim),
	81	fDist23toPrim(source.fDist23toPrim)
	82	{
	83	//
	84	// Copy constructor
	85	//
	86	}
	87	//--------------------------------------------------------------------------
	88	AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source)
	89	{
	90	//
	91	// assignment operator
	92	//
	93	if(&source == this) return *this;
dcb444c9	94
	95	AliAODRecoDecayHF::operator=(source);
	96
3244eeed	97	fDist12toPrim= source.fDist12toPrim;
	98	fDist23toPrim= source.fDist23toPrim;
	99	fSigmaVert= source.fSigmaVert;
dcb444c9	100
3244eeed	101	return *this;
	102	}
	103	//--------------------------------------------------------------------------
	104	Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts)
	105	const {
	106	//
	107	// This function compares the Dplus with a set of cuts:
	108	//
	109	// cuts[0] = inv. mass half width [GeV]
	110	// cuts[1] = pTK [GeV/c]
	111	// cuts[2] = pTPi [GeV/c]
	112	// cuts[3] = d0K [cm] lower limit!
	113	// cuts[4] = d0Pi [cm] lower limit!
	114	// cuts[5] = dist12 (cm)
	115	// cuts[6] = sigmavert (cm)
	116	// cuts[7] = dist prim-sec (cm)
	117	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	118	// cuts[9] = cosThetaPoint
	119	// cuts[10] = Sum d0^2 (cm^2)
	120	// cuts[11] = dca cut (cm)
	121	//
	122	// If candidate Dplus does not pass the cuts return kFALSE
	123	//
	124
	125	Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass();
	126	Double_t mDplus=InvMassDplus();
	127	if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE;
	128	//single track
	129	if(TMath::Abs(PtProng(1)) < cuts[1] \|\| TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon
	130	if(TMath::Abs(PtProng(0)) < cuts[2] \|\| TMath::Abs(Getd0Prong(0))<cuts[4])return kFALSE;//Pion1
	131	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2
	132
	133	//DCA
81679460	134	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
3244eeed	135
	136	//2track cuts
	137	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
	138	if(Getd0Prong(0)Getd0Prong(1)<0. && Getd0Prong(2)Getd0Prong(1)<0.)return kFALSE;
	139
	140	//sec vert
	141	if(fSigmaVert>cuts[6])return kFALSE;
	142
	143	if(DecayLength()<cuts[7])return kFALSE;
	144
	145	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	146	if(CosPointingAngle() < cuts[9])return kFALSE;
	147	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	148	if(sum2<cuts[10])return kFALSE;
	149	return kTRUE;
	150	}
79250a2b	151	//--------------------------------------------------------------------------
9fce5365	152	Bool_t AliAODRecoDecayHF3Prong::SelectDs(const Double_t *cuts,Int_t &okDsKKpi,Int_t &okDspiKK, Int_t &okMassPhi, Int_t &okMassK0star)
79250a2b	153	const {
79250a2b	154	//
6ea608bf	155	// This function compares the Ds with a set of cuts
6ea608bf	156	// (same variables as D+, for now)
79250a2b	157	//
79250a2b	158	// cuts[0] = inv. mass half width [GeV]
6ea608bf	159	// cuts[1] = pTK [GeV/c]
	160	// cuts[2] = pTPi [GeV/c]
	161	// cuts[3] = d0K [cm] lower limit!
	162	// cuts[4] = d0Pi [cm] lower limit!
	163	// cuts[5] = dist12 (cm)
	164	// cuts[6] = sigmavert (cm)
	165	// cuts[7] = dist prim-sec (cm)
	166	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	167	// cuts[9] = cosThetaPoint
	168	// cuts[10] = Sum d0^2 (cm^2)
	169	// cuts[11] = dca cut (cm)
9fce5365	170	// cuts[12] = max. inv. mass difference(Mphi-MKK) [GeV]
9fce5365	171	// cuts[13] = max. inv. mass difference(MK0*-MKpi) [GeV]
79250a2b	172	//
	173	// If candidate Ds does not pass the cuts return kFALSE
	174	//
	175	Double_t mDsKKpi,mDspiKK;
	176	okDsKKpi=1; okDspiKK=1;
9fce5365	177	okMassPhi=0; okMassK0star=0;
79250a2b	178
	179	Double_t mDsPDG = TDatabasePDG::Instance()->GetParticle(431)->Mass();
	180
	181	mDsKKpi=InvMassDsKKpi();
	182	mDspiKK=InvMassDspiKK();
	183
	184	if(TMath::Abs(mDsKKpi-mDsPDG)>cuts[0]) okDsKKpi = 0;
	185	if(TMath::Abs(mDspiKK-mDsPDG)>cuts[0]) okDspiKK = 0;
	186	if(!okDsKKpi && !okDspiKK) return kFALSE;
	187
6ea608bf	188	//single track
	189	if(TMath::Abs(PtProng(0)) < cuts[1] \|\| TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Kaon1
	190	if(TMath::Abs(PtProng(1)) < cuts[1] \|\| TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon2
81679460	191	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion
6ea608bf	192
81679460	193	// cuts on resonant decays (via Phi or K0*)
81679460	194	Double_t mPhiPDG = TDatabasePDG::Instance()->GetParticle(333)->Mass();
9fce5365	195	Double_t mK0starPDG = TDatabasePDG::Instance()->GetParticle(313)->Mass();
	196	if(okDsKKpi){
	197	Double_t mass01phi=InvMass2Prongs(0,1,321,321);
	198	Double_t mass12K0s=InvMass2Prongs(1,2,321,211);
	199	if(TMath::Abs(mass01phi-mPhiPDG)<cuts[12]) okMassPhi=1;
	200	if(TMath::Abs(mass12K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
	201	if(!okMassPhi && !okMassK0star) okDsKKpi=kFALSE;
	202	}
	203	if(okDspiKK){
	204	Double_t mass01K0s=InvMass2Prongs(0,1,211,321);
	205	Double_t mass12phi=InvMass2Prongs(1,2,321,321);
	206	if(TMath::Abs(mass01K0s-mK0starPDG)<cuts[13]) okMassK0star = 1;
	207	if(TMath::Abs(mass12phi-mPhiPDG)<cuts[12]) okMassPhi=1;
	208	if(!okMassPhi && !okMassK0star) okDspiKK=kFALSE;
	209	}
	210	if(!okDsKKpi && !okDspiKK) return kFALSE;
	211
	212
	213
81679460	214
6ea608bf	215	//DCA
81679460	216	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
6ea608bf	217
	218	//2track cuts
	219	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
6ea608bf	220
	221	//sec vert
	222	if(fSigmaVert>cuts[6])return kFALSE;
	223
	224	if(DecayLength()<cuts[7])return kFALSE;
	225
	226	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	227	if(CosPointingAngle() < cuts[9])return kFALSE;
	228	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	229	if(sum2<cuts[10])return kFALSE;
	230
79250a2b	231	return kTRUE;
	232	}
	233	//--------------------------------------------------------------------------
	234	Bool_t AliAODRecoDecayHF3Prong::SelectLc(const Double_t *cuts,Int_t &okLcpKpi,Int_t &okLcpiKp)
	235	const {
	236	//
6ea608bf	237	// This function compares the Lc with a set of cuts
6ea608bf	238	// (same variables as D+, for now)
79250a2b	239	//
79250a2b	240	// cuts[0] = inv. mass half width [GeV]
6ea608bf	241	// cuts[1] = pTP [GeV/c]
	242	// cuts[2] = pTPi and pTK [GeV/c]
	243	// cuts[3] = d0P [cm] lower limit!
	244	// cuts[4] = d0Pi and d0K [cm] lower limit!
	245	// cuts[5] = dist12 (cm)
	246	// cuts[6] = sigmavert (cm)
	247	// cuts[7] = dist prim-sec (cm)
	248	// cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
	249	// cuts[9] = cosThetaPoint
	250	// cuts[10] = Sum d0^2 (cm^2)
	251	// cuts[11] = dca cut (cm)
79250a2b	252	//
	253	// If candidate Lc does not pass the cuts return kFALSE
	254	//
	255	Double_t mLcpKpi,mLcpiKp;
	256	okLcpKpi=1; okLcpiKp=1;
	257
	258	Double_t mLcPDG = TDatabasePDG::Instance()->GetParticle(4122)->Mass();
	259
	260	mLcpKpi=InvMassLcpKpi();
	261	mLcpiKp=InvMassLcpiKp();
	262
	263	if(TMath::Abs(mLcpKpi-mLcPDG)>cuts[0]) okLcpKpi = 0;
	264	if(TMath::Abs(mLcpiKp-mLcPDG)>cuts[0]) okLcpiKp = 0;
	265	if(!okLcpKpi && !okLcpiKp) return kFALSE;
	266
6ea608bf	267	//single track
	268	if(TMath::Abs(PtProng(0)) < cuts[1] \|\| TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Proton
	269	if(TMath::Abs(PtProng(1)) < cuts[2] \|\| TMath::Abs(Getd0Prong(1))<cuts[4])return kFALSE;//Kaon
	270	if(TMath::Abs(PtProng(2)) < cuts[2] \|\| TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion
	271
	272	//DCA
81679460	273	for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE;
6ea608bf	274
	275	//2track cuts
	276	if(fDist12toPrim<cuts[5] \|\| fDist23toPrim<cuts[5])return kFALSE;
	277	if(Getd0Prong(0)Getd0Prong(1)<0. && Getd0Prong(2)Getd0Prong(1)<0.)return kFALSE;
	278
	279	//sec vert
	280	if(fSigmaVert>cuts[6])return kFALSE;
	281
	282	if(DecayLength()<cuts[7])return kFALSE;
	283
	284	if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
	285	if(CosPointingAngle() < cuts[9])return kFALSE;
	286	Double_t sum2=Getd0Prong(0)Getd0Prong(0)+Getd0Prong(1)Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
	287	if(sum2<cuts[10])return kFALSE;
	288
79250a2b	289	return kTRUE;
79250a2b	290	}
2e153422	291
	292
	293	//----------------------------------------------------------------------
	294	Double_t AliAODRecoDecayHF3Prong::CosPiKPhiRFrame(Int_t option)
	295	const {
	296	// computes cosine of angle between pi and K in the phi rest frame
	297
	298	Int_t indexPi;
	299	Int_t indexK1;
	300	Int_t indexK2;
	301
	302	if (option==0){ //KKpi
	303	indexPi=2;
	304	indexK1=0;
	305	indexK2=1;
	306	}
	307
	308	if (option==1){ //piKK
	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;
	349	Int_t indexK1;
	350	Int_t indexK2;
	351
	352	if (option==0){ //KKpi
	353	indexPi=2;
	354	indexK1=0;
355	indexK2=1;
356	}
357
358	if (option==1){ //piKK
359	indexPi=0;
360	indexK1=1;
361	indexK2=2;
362	}
363
364
365	Double_t bxD=Px()/E(431);
366	Double_t byD=Py()/E(431);
367	Double_t bzD=Pz()/E(431);
368
369	TVector3 piDsframe;
370	TLorentzVector* vecPi=new TLorentzVector(PxProng(indexPi),PyProng(indexPi),PzProng(indexPi),EProng(indexPi,211));
371	vecPi->Boost(-bxD,-byD,-bzD);
372	vecPi->Boost(piDsframe);
373	piDsframe=vecPi->BoostVector();
374
375	TVector3 vecDs(Px(),Py(),Pz());
376
377	Double_t inner=vecDs.Dot(piDsframe);
378	Double_t norm1=TMath::Sqrt(vecDs.Dot(vecDs));
379	Double_t norm2=TMath::Sqrt(piDsframe.Dot(piDsframe));
380	Double_t cosPiDsFrame=inner/(norm1*norm2);
381
382
383	return cosPiDsFrame;
384
385	}
386