| 8c90f5a2 |
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 */ |
| 5 | |
| 6 | /* $Id$ */ |
| 7 | |
| 8 | //----------------------------------------------------------------------------- |
| 9 | // |
| 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 |
| 12 | // |
| 13 | // For the electromagnetic form factor the parameterization from |
| 14 | // Lepton-G is used: L.G. Landsberg et al.: Phys. Rep. 128(1985)301 |
| 15 | // |
| 16 | //----------------------------------------------------------------------------- |
| 17 | |
| 18 | |
| 19 | #include "AliDecayer.h" |
| 20 | #include <TLorentzVector.h> |
| 21 | |
| 22 | class TH1F; |
| 23 | class TClonesArray; |
| 24 | |
| 25 | class AliOmegaDalitz : public AliDecayer |
| 26 | { |
| 27 | public: |
| 28 | AliOmegaDalitz(); |
| 29 | virtual void Init(); |
| 30 | virtual void Decay(Int_t idpart, 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* LeptonPairMassHisto() {return fLPMass;} |
| 38 | |
| 39 | private: |
| 40 | virtual void Rot(Double_t pin[3], Double_t pout[3], |
| 41 | Double_t costheta, Double_t sintheta, |
| 42 | Double_t cosphi, Double_t sinphi); |
| 43 | |
| 44 | protected: |
| 45 | TH1F* fLPMass; // Histogram for lepton pair mass |
| 46 | TLorentzVector fProducts[3]; // Decay products |
| 47 | ClassDef(AliOmegaDalitz, 1) // AliDecayer implementation for omega Dalitz |
| 48 | }; |
| 49 | |
| 50 | #endif |
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