[u/mrichter/AliRoot.git] / STEER / AliAODRecoDecay.h

#ifndef ALIAODRECODECAY_H
#define ALIAODRECODECAY_H
/* Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

//***********************************************************
// Class AliAODRecoDecay
// base class for AOD reconstructed decays
// Author: A.Dainese, andrea.dainese@lnl.infn.it
//***********************************************************

#include <TMath.h>
#include <TRef.h>
#include "AliAODVertex.h"
#include "AliVParticle.h"

class AliAODRecoDecay : public AliVParticle {

 public:

  AliAODRecoDecay();
  AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
		  Double_t *px,Double_t *py,Double_t *pz,
		  Double_t *d0);
  AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
		  Double_t *d0);
  virtual ~AliAODRecoDecay();

  AliAODRecoDecay(const AliAODRecoDecay& source);
  AliAODRecoDecay& operator=(const AliAODRecoDecay& source); 
   

  // decay vertex
  Double_t GetSecVtxX() const {return GetSecondaryVtx()->GetX();}
  Double_t GetSecVtxY() const {return GetSecondaryVtx()->GetY();}
  Double_t GetSecVtxZ() const {return GetSecondaryVtx()->GetZ();}
  Double_t RadiusSecVtx() const;
  void     SetSecondaryVtx(AliAODVertex *vtx2) {fSecondaryVtx=vtx2;}
  AliAODVertex* GetSecondaryVtx() const { return (((AliAODVertex*)fSecondaryVtx.GetObject()) ? (AliAODVertex*)fSecondaryVtx.GetObject() : GetOwnSecondaryVtx()); }
  void     SetOwnSecondaryVtx(AliAODVertex *vtx2) {fOwnSecondaryVtx=vtx2;}
  AliAODVertex* GetOwnSecondaryVtx() const {return fOwnSecondaryVtx;}
  void     GetSecondaryVtx(Double_t vtx[3]) const;
  Double_t GetReducedChi2() const {return GetSecondaryVtx()->GetChi2perNDF();}
  Short_t  Charge() const {return fCharge;}
  Short_t  GetCharge() const {return fCharge;}
  void     SetCharge(Short_t charge=0) {fCharge=charge;}

  // PID
  void      SetPID(Int_t nprongs,Double_t *pid);
  Double_t *GetPID() const { return fPID; }
  void      GetPIDProng(Int_t ip,Double_t *pid) const;
  virtual const Double_t *PID() const { return fPID; }

  // prong-to-prong DCAs
  void    SetDCAs(Int_t nDCA,Double_t *dca);
  void    SetDCA(Double_t dca); // 2 prong
  Double_t GetDCA(Int_t i=0) const {return fDCA[i];}

  //event and run number
  void SetEventRunNumbers(Int_t en,Int_t rn) 
    { fEventNumber=en; fRunNumber=rn; return; }
  Int_t GetEventNumber() const { return fEventNumber; }
  Int_t GetRunNumber() const { return fRunNumber; }

  // kinematics & topology
  Double_t Px() const; 
  Double_t Py() const;
  Double_t Pz() const;
  Double_t P() const {return TMath::Sqrt(Px()*Px()+Py()*Py()+Pz()*Pz());}
  Double_t Pt() const {return TMath::Sqrt(Px()*Px()+Py()*Py());}
  Double_t OneOverPt() const {return (Pt() ? 1./Pt() : 0.);}
  Bool_t   PxPyPz(Double_t p[3]) const { p[0] = Px(); p[1] = Py(); p[2] = Pz(); return kTRUE; }
  Double_t Phi() const {return TMath::Pi()+TMath::ATan2(-Py(),-Px());}
  Double_t Theta() const {return 0.5*TMath::Pi()-TMath::ATan(Pz()/(Pt()+1.e-13));}
  Double_t Eta() const {return 0.5*TMath::Log((P()+Pz())/(P()-Pz()+1.e-13));}
  Double_t Xv() const { return GetSecVtxX(); }
  Double_t Yv() const { return GetSecVtxY(); }
  Double_t Zv() const { return GetSecVtxZ(); }
  virtual Bool_t   XvYvZv(Double_t x[3]) const { x[0] = Xv(); x[1] = Yv(); x[2] = Zv(); return kTRUE; }
  Double_t E(UInt_t pdg) const;
  Double_t Y(UInt_t pdg) const {return 0.5*TMath::Log((E(pdg)+Pz())/(E(pdg)-Pz()+1.e-13));}
  Double_t DecayLength(Double_t point[3]) const;
  Double_t DecayLength(AliAODVertex *vtx1) const
  {return GetSecondaryVtx()->DistanceToVertex(vtx1);}
  Double_t DecayLengthError(AliAODVertex *vtx1) const
    {return GetSecondaryVtx()->ErrorDistanceToVertex(vtx1);}
  Double_t NormalizedDecayLength(AliAODVertex *vtx1) const 
    {return DecayLength(vtx1)/DecayLengthError(vtx1);}
  Double_t DecayLengthXY(Double_t point[3]) const;
  Double_t DecayLengthXY(AliAODVertex *vtx1) const
    {return GetSecondaryVtx()->DistanceXYToVertex(vtx1);}
  Double_t DecayLengthXYError(AliAODVertex *vtx1) const
    {return GetSecondaryVtx()->ErrorDistanceXYToVertex(vtx1);}
  Double_t NormalizedDecayLengthXY(AliAODVertex *vtx1) const 
    {return DecayLengthXY(vtx1)/DecayLengthXYError(vtx1);}
  Double_t Ct(UInt_t pdg,Double_t point[3]) const;
  Double_t Ct(UInt_t pdg,AliAODVertex *vtx1) const;
  Double_t CosPointingAngle(Double_t point[3]) const;
  Double_t CosPointingAngle(AliAODVertex *vtx1) const;
  Double_t CosPointingAngleXY(Double_t point[3]) const;
  Double_t CosPointingAngleXY(AliAODVertex *vtx1) const;
  Double_t CosThetaStar(Int_t ip,UInt_t pdgvtx,UInt_t pdgprong0,UInt_t pdgprong1) const;
  Double_t InvMass(Int_t npdg,UInt_t *pdg) const;
  Double_t ImpParXY(Double_t point[3]) const;
  Double_t ImpParXY(AliAODVertex *vtx1) const;

  // prongs
  //Int_t   GetNProngs() const {return GetSecondaryVtx()->GetNDaughters();}
  Int_t   GetNProngs() const {return fNProngs;}

  Short_t ChargeProng(Int_t ip) const;
  Double_t Getd0Prong(Int_t ip) const {return fd0[ip];}
  Double_t Prodd0d0(Int_t ip1=0,Int_t ip2=0) const {return fd0[ip1]*fd0[ip2];} 
  Double_t PxProng(Int_t ip) const {return fPx[ip];}
  Double_t PyProng(Int_t ip) const {return fPy[ip];}
  Double_t PzProng(Int_t ip) const {return fPz[ip];}
  Double_t PtProng(Int_t ip) const; 
  Double_t PProng(Int_t ip) const;
  Double_t PhiProng(Int_t ip) const 
    {return TMath::ATan2(PyProng(ip),PxProng(ip));}
    Double_t ThetaProng(Int_t ip) const 
      {return 0.5*TMath::Pi()-TMath::ATan(PzProng(ip)/(PtProng(ip)+1.e-13));}
  Double_t EtaProng(Int_t ip) const 
    {return -TMath::Log(TMath::Tan(0.5*ThetaProng(ip)));}
  Double_t EProng(Int_t ip,UInt_t pdg) const;
  Double_t YProng(Int_t ip,UInt_t pdg) const 
    {return 0.5*TMath::Log((EProng(ip,pdg)+PzProng(ip))/(EProng(ip,pdg)-PzProng(ip)+1.e-13));}
  Double_t Alpha() const;             // for Armenteros-Podolanski plot (V0's)
  Double_t QlProng(Int_t ip) const;
  Double_t QtProng(Int_t ip=0) const; // for Armenteros-Podolanski plot (V0's)
  Double_t QlProngFlightLine(Int_t ip,Double_t point[3]) const;
  Double_t QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
  Double_t QtProngFlightLine(Int_t ip,Double_t point[3]) const;
  Double_t QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
  Double_t InvMass2Prongs(Int_t ip1,Int_t ip2,UInt_t pdg1,UInt_t pdg2) const;
  Double_t ProngsRelAngle(Int_t ip1=0,Int_t ip2=1) const;

  // relate to other objects
  //Double_t DistanceToVertex(AliAODVertex *vtx) // distance to a AliAODVertex
  //Double_t DistanceToTrack(AliAODTrack *trk)   // distance to a AliAODTrack


  // print
  void    Print(Option_t* option = "") const;
  //void    PrintIndices() const {GetSecondaryVtx()->PrintIndices();}

  // dummy functions for inheritance from AliVParticle
  Double_t E() const 
    {printf("Dummy function; use AliAODRecoDecay::E(UInt_t pdg) instead"); return (Double_t)-999.;}
  Double_t Y() const 
    {printf("Dummy function; use AliAODRecoDecay::Y(UInt_t pdg) instead"); return (Double_t)-999.;}
  Double_t M() const 
    {printf("Dummy function"); return (Double_t)-999.;}

 protected:

  TRef     fSecondaryVtx;  // decay vertex
  AliAODVertex *fOwnSecondaryVtx;  // temporary solution (to work outside AliAODEvent)
  Short_t  fCharge;  // charge, use this convention for prongs charges:
                     // if(charge== 0) even-index prongs are +
                     //                odd-index prongs are -
                     // if(charge==+1) even-index prongs are +
                     //                odd-index prongs are -
                     // if(charge==-1) even-index prongs are -
                     //                odd-index prongs are +

  // TEMPORARY, to be removed when we do analysis on AliAODEvent
  Int_t fNProngs;    // number of prongs
  Int_t fNDCA;       // number of dca's
  Int_t fNPID;       // number of PID probabilities
  Double32_t *fPx;   //[fNProngs] px of tracks at the vertex [GeV/c]
  Double32_t *fPy;   //[fNProngs] py of tracks at the vertex [GeV/c]
  Double32_t *fPz;   //[fNProngs] pz of tracks at the vertex [GeV/c]
  Double32_t *fd0;   //[fNProngs] rphi impact params w.r.t. Primary Vtx [cm]
  Double32_t *fDCA;  //[fNDCA] prong-to-prong DCA [cm]
                     // convention:fDCA[0]=p0p1,fDCA[1]=p0p2,fDCA[2]=p1p2,...
  Double32_t *fPID;  //[fNPID] combined pid
                     //  (combined detector response probabilities)
                            
  // TEMPORARY, to be removed when we do analysis on AliAODEvent
  Int_t fEventNumber;
  Int_t fRunNumber;
  // TO BE PUT IN SPECIAL MC CLASS
  //Bool_t   fSignal; // TRUE if signal, FALSE if background (for simulation)
  //Int_t  fTrkNum[2]; // numbers of the two decay tracks  
  //Int_t fPdg[2];  // PDG codes of the two tracks (for sim.)
  //Int_t fMum[2];  // PDG codes of the mothers    (for sim.)

  //

  ClassDef(AliAODRecoDecay,3)  // base class for AOD reconstructed decays
};


inline Short_t AliAODRecoDecay::ChargeProng(Int_t ip) const
{
  if(fCharge==0 || fCharge==+1) {
    if(ip%2==0) {
      return (Short_t)1;
    } else {
      return (Short_t)-1;
    }
  } else { // fCharge==-1
    if(ip%2==0) {
      return (Short_t)-1;
    } else {
      return (Short_t)1;
    }
  }
}

inline Double_t AliAODRecoDecay::RadiusSecVtx() const 
{ 
  return TMath::Sqrt(GetSecVtxX()*GetSecVtxX()+GetSecVtxY()*GetSecVtxY());
}

inline void AliAODRecoDecay::GetSecondaryVtx(Double_t vtx[3]) const 
{
  GetSecondaryVtx()->GetPosition(vtx);
  return;
}

inline Double_t AliAODRecoDecay::Px() const 
{
  Double_t px=0.; 
  for(Int_t i=0;i<GetNProngs();i++) px+=PxProng(i); 
  return px;
}

inline Double_t AliAODRecoDecay::Py() const 
{
  Double_t py=0.; 
  for(Int_t i=0;i<GetNProngs();i++) py+=PyProng(i); 
  return py;
}

inline Double_t AliAODRecoDecay::Pz() const 
{
  Double_t pz=0.; 
  for(Int_t i=0;i<GetNProngs();i++) pz+=PzProng(i); 
  return pz;
}

inline Double_t AliAODRecoDecay::Ct(UInt_t pdg,AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return Ct(pdg,v);
}

inline Double_t AliAODRecoDecay::CosPointingAngle(AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return CosPointingAngle(v);
}

inline Double_t AliAODRecoDecay::CosPointingAngleXY(AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return CosPointingAngleXY(v);
}

inline Double_t AliAODRecoDecay::ImpParXY(AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return ImpParXY(v);
}

inline Double_t AliAODRecoDecay::PtProng(Int_t ip) const 
{
  return TMath::Sqrt(PxProng(ip)*PxProng(ip)+PyProng(ip)*PyProng(ip));
}

inline Double_t AliAODRecoDecay::PProng(Int_t ip) const 
{
  return TMath::Sqrt(PtProng(ip)*PtProng(ip)+PzProng(ip)*PzProng(ip));
}

inline Double_t AliAODRecoDecay::QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return QlProngFlightLine(ip,v);
}

inline Double_t AliAODRecoDecay::QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
{
  Double_t v[3];
  vtx1->GetPosition(v);
  return QtProngFlightLine(ip,v);
}

inline void AliAODRecoDecay::SetDCAs(Int_t nDCA,Double_t *dca) 
{
  if(nDCA!=(GetNProngs()*(GetNProngs()-1)/2)) { 
    printf("Wrong number of DCAs, must be nProngs*(nProngs-1)/2");
    return;
  }
  if(fDCA) delete [] fDCA;
  fNDCA = nDCA;
  fDCA = new Double32_t[nDCA];
  for(Int_t i=0;i<nDCA;i++) 
    fDCA[i] = dca[i]; 
  return;
}

inline void AliAODRecoDecay::SetDCA(Double_t dca) 
{
  Double_t ddca[1]; ddca[0]=dca;
  SetDCAs(1,ddca);
  return;
}

inline void AliAODRecoDecay::SetPID(Int_t nprongs,Double_t *pid) 
{
  if(nprongs!=GetNProngs()) {
    printf("Wrong number of prongs");
    return;
  }
  if(fPID) delete [] fPID;
  fNPID = nprongs;
  fPID = new Double32_t[nprongs*5];
  for(Int_t i=0;i<nprongs;i++) 
    for(Int_t j=0;j<5;j++)
      fPID[i*5+j] = pid[i*5+j]; 
  return;
}

inline void AliAODRecoDecay::GetPIDProng(Int_t ip,Double_t *pid) const
{ 
  for(Int_t j=0;j<5;j++)
    pid[j] = fPID[ip*5+j];
  return;
}


#endif
Commit	Line	Data
7de7497b	1	#ifndef ALIAODRECODECAY_H
	2	#define ALIAODRECODECAY_H
	3	/* Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	//***********************************************************
	7	// Class AliAODRecoDecay
	8	// base class for AOD reconstructed decays
	9	// Author: A.Dainese, andrea.dainese@lnl.infn.it
	10	//***********************************************************
	11
	12	#include <TMath.h>
5cc73331	13	#include <TRef.h>
7de7497b	14	#include "AliAODVertex.h"
ff7c57dd	15	#include "AliVParticle.h"
7de7497b	16
ff7c57dd	17	class AliAODRecoDecay : public AliVParticle {
7de7497b	18
	19	public:
	20
	21	AliAODRecoDecay();
	22	AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
	23	Double_t px,Double_t py,Double_t *pz,
	24	Double_t *d0);
	25	AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
	26	Double_t *d0);
	27	virtual ~AliAODRecoDecay();
	28
	29	AliAODRecoDecay(const AliAODRecoDecay& source);
	30	AliAODRecoDecay& operator=(const AliAODRecoDecay& source);
	31
	32
	33	// decay vertex
5cc73331	34	Double_t GetSecVtxX() const {return GetSecondaryVtx()->GetX();}
	35	Double_t GetSecVtxY() const {return GetSecondaryVtx()->GetY();}
	36	Double_t GetSecVtxZ() const {return GetSecondaryVtx()->GetZ();}
7de7497b	37	Double_t RadiusSecVtx() const;
7de7497b	38	void SetSecondaryVtx(AliAODVertex *vtx2) {fSecondaryVtx=vtx2;}
a11de4a0	39	AliAODVertex* GetSecondaryVtx() const { return (((AliAODVertex)fSecondaryVtx.GetObject()) ? (AliAODVertex)fSecondaryVtx.GetObject() : GetOwnSecondaryVtx()); }
	40	void SetOwnSecondaryVtx(AliAODVertex *vtx2) {fOwnSecondaryVtx=vtx2;}
	41	AliAODVertex* GetOwnSecondaryVtx() const {return fOwnSecondaryVtx;}
7de7497b	42	void GetSecondaryVtx(Double_t vtx[3]) const;
5cc73331	43	Double_t GetReducedChi2() const {return GetSecondaryVtx()->GetChi2perNDF();}
7de7497b	44	Short_t Charge() const {return fCharge;}
	45	Short_t GetCharge() const {return fCharge;}
	46	void SetCharge(Short_t charge=0) {fCharge=charge;}
	47
	48	// PID
	49	void SetPID(Int_t nprongs,Double_t *pid);
	50	Double_t *GetPID() const { return fPID; }
	51	void GetPIDProng(Int_t ip,Double_t *pid) const;
	52	virtual const Double_t *PID() const { return fPID; }
	53
	54	// prong-to-prong DCAs
5cc73331	55	void SetDCAs(Int_t nDCA,Double_t *dca);
	56	void SetDCA(Double_t dca); // 2 prong
	57	Double_t GetDCA(Int_t i=0) const {return fDCA[i];}
7de7497b	58
	59	//event and run number
	60	void SetEventRunNumbers(Int_t en,Int_t rn)
	61	{ fEventNumber=en; fRunNumber=rn; return; }
	62	Int_t GetEventNumber() const { return fEventNumber; }
	63	Int_t GetRunNumber() const { return fRunNumber; }
	64
	65	// kinematics & topology
	66	Double_t Px() const;
	67	Double_t Py() const;
	68	Double_t Pz() const;
	69	Double_t P() const {return TMath::Sqrt(Px()Px()+Py()Py()+Pz()*Pz());}
	70	Double_t Pt() const {return TMath::Sqrt(Px()Px()+Py()Py());}
	71	Double_t OneOverPt() const {return (Pt() ? 1./Pt() : 0.);}
c683ddc2	72	Bool_t PxPyPz(Double_t p[3]) const { p[0] = Px(); p[1] = Py(); p[2] = Pz(); return kTRUE; }
1eab4b5c	73	Double_t Phi() const {return TMath::Pi()+TMath::ATan2(-Py(),-Px());}
7de7497b	74	Double_t Theta() const {return 0.5*TMath::Pi()-TMath::ATan(Pz()/(Pt()+1.e-13));}
7de7497b	75	Double_t Eta() const {return 0.5*TMath::Log((P()+Pz())/(P()-Pz()+1.e-13));}
c683ddc2	76	Double_t Xv() const { return GetSecVtxX(); }
	77	Double_t Yv() const { return GetSecVtxY(); }
	78	Double_t Zv() const { return GetSecVtxZ(); }
	79	virtual Bool_t XvYvZv(Double_t x[3]) const { x[0] = Xv(); x[1] = Yv(); x[2] = Zv(); return kTRUE; }
7de7497b	80	Double_t E(UInt_t pdg) const;
	81	Double_t Y(UInt_t pdg) const {return 0.5*TMath::Log((E(pdg)+Pz())/(E(pdg)-Pz()+1.e-13));}
	82	Double_t DecayLength(Double_t point[3]) const;
	83	Double_t DecayLength(AliAODVertex *vtx1) const
5cc73331	84	{return GetSecondaryVtx()->DistanceToVertex(vtx1);}
7de7497b	85	Double_t DecayLengthError(AliAODVertex *vtx1) const
5cc73331	86	{return GetSecondaryVtx()->ErrorDistanceToVertex(vtx1);}
7de7497b	87	Double_t NormalizedDecayLength(AliAODVertex *vtx1) const
	88	{return DecayLength(vtx1)/DecayLengthError(vtx1);}
	89	Double_t DecayLengthXY(Double_t point[3]) const;
	90	Double_t DecayLengthXY(AliAODVertex *vtx1) const
5cc73331	91	{return GetSecondaryVtx()->DistanceXYToVertex(vtx1);}
7de7497b	92	Double_t DecayLengthXYError(AliAODVertex *vtx1) const
5cc73331	93	{return GetSecondaryVtx()->ErrorDistanceXYToVertex(vtx1);}
7de7497b	94	Double_t NormalizedDecayLengthXY(AliAODVertex *vtx1) const
	95	{return DecayLengthXY(vtx1)/DecayLengthXYError(vtx1);}
	96	Double_t Ct(UInt_t pdg,Double_t point[3]) const;
	97	Double_t Ct(UInt_t pdg,AliAODVertex *vtx1) const;
	98	Double_t CosPointingAngle(Double_t point[3]) const;
	99	Double_t CosPointingAngle(AliAODVertex *vtx1) const;
	100	Double_t CosPointingAngleXY(Double_t point[3]) const;
	101	Double_t CosPointingAngleXY(AliAODVertex *vtx1) const;
	102	Double_t CosThetaStar(Int_t ip,UInt_t pdgvtx,UInt_t pdgprong0,UInt_t pdgprong1) const;
	103	Double_t InvMass(Int_t npdg,UInt_t *pdg) const;
	104	Double_t ImpParXY(Double_t point[3]) const;
	105	Double_t ImpParXY(AliAODVertex *vtx1) const;
	106
	107	// prongs
5cc73331	108	//Int_t GetNProngs() const {return GetSecondaryVtx()->GetNDaughters();}
7de7497b	109	Int_t GetNProngs() const {return fNProngs;}
	110
	111	Short_t ChargeProng(Int_t ip) const;
	112	Double_t Getd0Prong(Int_t ip) const {return fd0[ip];}
	113	Double_t Prodd0d0(Int_t ip1=0,Int_t ip2=0) const {return fd0[ip1]*fd0[ip2];}
	114	Double_t PxProng(Int_t ip) const {return fPx[ip];}
	115	Double_t PyProng(Int_t ip) const {return fPy[ip];}
	116	Double_t PzProng(Int_t ip) const {return fPz[ip];}
	117	Double_t PtProng(Int_t ip) const;
	118	Double_t PProng(Int_t ip) const;
	119	Double_t PhiProng(Int_t ip) const
	120	{return TMath::ATan2(PyProng(ip),PxProng(ip));}
	121	Double_t ThetaProng(Int_t ip) const
	122	{return 0.5*TMath::Pi()-TMath::ATan(PzProng(ip)/(PtProng(ip)+1.e-13));}
	123	Double_t EtaProng(Int_t ip) const
	124	{return -TMath::Log(TMath::Tan(0.5*ThetaProng(ip)));}
	125	Double_t EProng(Int_t ip,UInt_t pdg) const;
	126	Double_t YProng(Int_t ip,UInt_t pdg) const
	127	{return 0.5*TMath::Log((EProng(ip,pdg)+PzProng(ip))/(EProng(ip,pdg)-PzProng(ip)+1.e-13));}
	128	Double_t Alpha() const; // for Armenteros-Podolanski plot (V0's)
	129	Double_t QlProng(Int_t ip) const;
	130	Double_t QtProng(Int_t ip=0) const; // for Armenteros-Podolanski plot (V0's)
	131	Double_t QlProngFlightLine(Int_t ip,Double_t point[3]) const;
	132	Double_t QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
	133	Double_t QtProngFlightLine(Int_t ip,Double_t point[3]) const;
	134	Double_t QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
	135	Double_t InvMass2Prongs(Int_t ip1,Int_t ip2,UInt_t pdg1,UInt_t pdg2) const;
	136	Double_t ProngsRelAngle(Int_t ip1=0,Int_t ip2=1) const;
	137
	138	// relate to other objects
	139	//Double_t DistanceToVertex(AliAODVertex *vtx) // distance to a AliAODVertex
	140	//Double_t DistanceToTrack(AliAODTrack *trk) // distance to a AliAODTrack
	141
	142
	143	// print
	144	void Print(Option_t* option = "") const;
5cc73331	145	//void PrintIndices() const {GetSecondaryVtx()->PrintIndices();}
7de7497b	146
ff7c57dd	147	// dummy functions for inheritance from AliVParticle
7de7497b	148	Double_t E() const
	149	{printf("Dummy function; use AliAODRecoDecay::E(UInt_t pdg) instead"); return (Double_t)-999.;}
	150	Double_t Y() const
	151	{printf("Dummy function; use AliAODRecoDecay::Y(UInt_t pdg) instead"); return (Double_t)-999.;}
	152	Double_t M() const
	153	{printf("Dummy function"); return (Double_t)-999.;}
	154
	155	protected:
	156
5cc73331	157	TRef fSecondaryVtx; // decay vertex
a11de4a0	158	AliAODVertex *fOwnSecondaryVtx; // temporary solution (to work outside AliAODEvent)
5cc73331	159	Short_t fCharge; // charge, use this convention for prongs charges:
	160	// if(charge== 0) even-index prongs are +
	161	// odd-index prongs are -
	162	// if(charge==+1) even-index prongs are +
	163	// odd-index prongs are -
	164	// if(charge==-1) even-index prongs are -
	165	// odd-index prongs are +
7de7497b	166
7de7497b	167	// TEMPORARY, to be removed when we do analysis on AliAODEvent
5cc73331	168	Int_t fNProngs; // number of prongs
	169	Int_t fNDCA; // number of dca's
	170	Int_t fNPID; // number of PID probabilities
	171	Double32_t *fPx; //[fNProngs] px of tracks at the vertex [GeV/c]
	172	Double32_t *fPy; //[fNProngs] py of tracks at the vertex [GeV/c]
	173	Double32_t *fPz; //[fNProngs] pz of tracks at the vertex [GeV/c]
	174	Double32_t *fd0; //[fNProngs] rphi impact params w.r.t. Primary Vtx [cm]
	175	Double32_t *fDCA; //[fNDCA] prong-to-prong DCA [cm]
	176	// convention:fDCA[0]=p0p1,fDCA[1]=p0p2,fDCA[2]=p1p2,...
	177	Double32_t *fPID; //[fNPID] combined pid
	178	// (combined detector response probabilities)
7de7497b	179
	180	// TEMPORARY, to be removed when we do analysis on AliAODEvent
	181	Int_t fEventNumber;
	182	Int_t fRunNumber;
	183	// TO BE PUT IN SPECIAL MC CLASS
	184	//Bool_t fSignal; // TRUE if signal, FALSE if background (for simulation)
7de7497b	185	//Int_t fTrkNum[2]; // numbers of the two decay tracks
	186	//Int_t fPdg[2]; // PDG codes of the two tracks (for sim.)
	187	//Int_t fMum[2]; // PDG codes of the mothers (for sim.)
	188
	189	//
	190
0fc99302	191	ClassDef(AliAODRecoDecay,3) // base class for AOD reconstructed decays
7de7497b	192	};
	193
	194
	195	inline Short_t AliAODRecoDecay::ChargeProng(Int_t ip) const
	196	{
	197	if(fCharge==0 \|\| fCharge==+1) {
	198	if(ip%2==0) {
	199	return (Short_t)1;
	200	} else {
	201	return (Short_t)-1;
	202	}
	203	} else { // fCharge==-1
	204	if(ip%2==0) {
	205	return (Short_t)-1;
	206	} else {
	207	return (Short_t)1;
	208	}
	209	}
	210	}
	211
	212	inline Double_t AliAODRecoDecay::RadiusSecVtx() const
	213	{
	214	return TMath::Sqrt(GetSecVtxX()GetSecVtxX()+GetSecVtxY()GetSecVtxY());
	215	}
	216
	217	inline void AliAODRecoDecay::GetSecondaryVtx(Double_t vtx[3]) const
	218	{
5cc73331	219	GetSecondaryVtx()->GetPosition(vtx);
7de7497b	220	return;
	221	}
	222
	223	inline Double_t AliAODRecoDecay::Px() const
	224	{
	225	Double_t px=0.;
	226	for(Int_t i=0;i<GetNProngs();i++) px+=PxProng(i);
	227	return px;
	228	}
	229
	230	inline Double_t AliAODRecoDecay::Py() const
	231	{
	232	Double_t py=0.;
	233	for(Int_t i=0;i<GetNProngs();i++) py+=PyProng(i);
	234	return py;
	235	}
	236
	237	inline Double_t AliAODRecoDecay::Pz() const
	238	{
	239	Double_t pz=0.;
	240	for(Int_t i=0;i<GetNProngs();i++) pz+=PzProng(i);
	241	return pz;
	242	}
	243
	244	inline Double_t AliAODRecoDecay::Ct(UInt_t pdg,AliAODVertex *vtx1) const
	245	{
	246	Double_t v[3];
	247	vtx1->GetPosition(v);
	248	return Ct(pdg,v);
	249	}
	250
	251	inline Double_t AliAODRecoDecay::CosPointingAngle(AliAODVertex *vtx1) const
	252	{
	253	Double_t v[3];
	254	vtx1->GetPosition(v);
	255	return CosPointingAngle(v);
	256	}
	257
	258	inline Double_t AliAODRecoDecay::CosPointingAngleXY(AliAODVertex *vtx1) const
	259	{
	260	Double_t v[3];
	261	vtx1->GetPosition(v);
	262	return CosPointingAngleXY(v);
	263	}
	264
	265	inline Double_t AliAODRecoDecay::ImpParXY(AliAODVertex *vtx1) const
	266	{
	267	Double_t v[3];
	268	vtx1->GetPosition(v);
	269	return ImpParXY(v);
	270	}
	271
	272	inline Double_t AliAODRecoDecay::PtProng(Int_t ip) const
	273	{
	274	return TMath::Sqrt(PxProng(ip)PxProng(ip)+PyProng(ip)PyProng(ip));
	275	}
	276
	277	inline Double_t AliAODRecoDecay::PProng(Int_t ip) const
	278	{
	279	return TMath::Sqrt(PtProng(ip)PtProng(ip)+PzProng(ip)PzProng(ip));
	280	}
	281
	282	inline Double_t AliAODRecoDecay::QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
	283	{
284	Double_t v[3];
285	vtx1->GetPosition(v);
286	return QlProngFlightLine(ip,v);
287	}
288
289	inline Double_t AliAODRecoDecay::QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
290	{
291	Double_t v[3];
292	vtx1->GetPosition(v);
293	return QtProngFlightLine(ip,v);
294	}
295
5cc73331	296	inline void AliAODRecoDecay::SetDCAs(Int_t nDCA,Double_t *dca)
7de7497b	297	{
	298	if(nDCA!=(GetNProngs()*(GetNProngs()-1)/2)) {
	299	printf("Wrong number of DCAs, must be nProngs*(nProngs-1)/2");
	300	return;
	301	}
	302	if(fDCA) delete [] fDCA;
94de4057	303	fNDCA = nDCA;
5cc73331	304	fDCA = new Double32_t[nDCA];
7de7497b	305	for(Int_t i=0;i<nDCA;i++)
	306	fDCA[i] = dca[i];
	307	return;
	308	}
	309
5cc73331	310	inline void AliAODRecoDecay::SetDCA(Double_t dca)
7de7497b	311	{
5cc73331	312	Double_t ddca[1]; ddca[0]=dca;
7de7497b	313	SetDCAs(1,ddca);
	314	return;
	315	}
	316
	317	inline void AliAODRecoDecay::SetPID(Int_t nprongs,Double_t *pid)
	318	{
	319	if(nprongs!=GetNProngs()) {
	320	printf("Wrong number of prongs");
	321	return;
	322	}
	323	if(fPID) delete [] fPID;
94de4057	324	fNPID = nprongs;
5cc73331	325	fPID = new Double32_t[nprongs*5];
7de7497b	326	for(Int_t i=0;i<nprongs;i++)
	327	for(Int_t j=0;j<5;j++)
	328	fPID[i5+j] = pid[i5+j];
	329	return;
	330	}
	331
	332	inline void AliAODRecoDecay::GetPIDProng(Int_t ip,Double_t *pid) const
	333	{
	334	for(Int_t j=0;j<5;j++)
	335	pid[j] = fPID[ip*5+j];
	336	return;
	337	}
	338
	339
	340
	341	#endif