LauFlatteRes.hh

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// Copyright University of Warwick 2004 - 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// Authors:
// Thomas Latham
// John Back
// Paul Harrison

#ifndef LAU_FLATTE_RES
#define LAU_FLATTE_RES

#include "TString.h"

#include "LauComplex.hh"
#include "LauAbsResonance.hh"


class LauFlatteRes : public LauAbsResonance {

        public:

                LauFlatteRes(TString resName, Double_t resMass, Double_t resWidth,
                                Int_t resSpin, Int_t resCharge, Int_t resPairAmpInt,
                                const LauDaughters* daughters);
                
                virtual ~LauFlatteRes();

                virtual void initialise();


                virtual LauAbsResonance::LauResonanceModel getResonanceModel() const {return LauAbsResonance::Flatte;}


                virtual void setResonanceParameter(const TString& name, const Double_t value);
                
        protected:

                Double_t getg1Parameter() const {return g1_;}


                Double_t getg2Parameter() const {return g2_;}


                void setGFactors(Double_t g1, Double_t g2);


                void setg1Parameter(Double_t g1) {g1_ = g1;}


                void setg2Parameter(Double_t g2) {g2_ = g2;}


                virtual LauComplex resAmp(Double_t mass, Double_t spinTerm);

        private:
                enum FlattePartType {FlattePi, FlatteK};

                Double_t resMassSq_;
                Double_t g1_; 
                Double_t g2_;
                Double_t mSumSq0_; 
                Double_t mSumSq1_; 
                Double_t mSumSq2_; 
                Double_t mSumSq3_;

                ClassDef(LauFlatteRes,0) // Flatte resonance model

};

#endif