1 #ifndef ALIOMEGADALITZ_H
2 #define ALIOMEGADALITZ_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 //-----------------------------------------------------------------------------
10 // Generate lepton-pair mass distributions for Dalitz decays according
11 // to the Kroll-Wada parametrization: N. Kroll, W. Wada: Phys. Rev 98(1955)1355
13 // For the electromagnetic form factor the parameterization from
14 // Lepton-G is used: L.G. Landsberg et al.: Phys. Rep. 128(1985)301
16 //-----------------------------------------------------------------------------
19 #include "AliDecayer.h"
20 #include <TLorentzVector.h>
25 class AliOmegaDalitz : public AliDecayer
30 virtual void Decay(Int_t idlepton, TLorentzVector* p);
31 virtual Int_t ImportParticles(TClonesArray *particles);
32 virtual void SetForceDecay(Int_t) {;}
33 virtual void ForceDecay() {;}
34 virtual Float_t GetPartialBranchingRatio(Int_t /*ipart*/) {return -1;}
35 virtual Float_t GetLifetime(Int_t /*kf*/) {return -1;}
36 virtual void ReadDecayTable() {;}
37 virtual TH1F* ElectronPairMassHisto() {return fEPMass;}
38 virtual TH1F* MuonPairMassHisto() {return fMPMass;}
40 virtual void Decay(TClonesArray* array);
41 virtual const TLorentzVector* Products() const {return fProducts;}
42 virtual void Copy(TObject&) const;
44 virtual void Rot(Double_t pin[3], Double_t pout[3],
45 Double_t costheta, Double_t sintheta,
46 Double_t cosphi, Double_t sinphi);
47 AliOmegaDalitz(const AliOmegaDalitz &dalitz);
48 AliOmegaDalitz & operator=(const AliOmegaDalitz & rhs);
51 TH1F* fEPMass; // Histogram for electron pair mass
52 TH1F* fMPMass; // Histogram for muon pair mass
53 TLorentzVector fProducts[3]; // Decay products
54 ClassDef(AliOmegaDalitz, 1) // AliDecayer implementation for omega Dalitz