LauSigmaRes.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_SIGMA_RES
#define LAU_SIGMA_RES

#include "TString.h"

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


class LauSigmaRes : public LauAbsResonance {

        public:

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

                virtual ~LauSigmaRes();

                virtual void initialise();


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


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

        protected:

                void setConstants(Double_t b1, Double_t b2, Double_t A, Double_t m0);


                void setB1Value(const Double_t b1) { b1_ = b1; }


                void setB2Value(const Double_t b2) { b2_ = b2; }


                void setAValue(const Double_t A) { A_ = A; }


                void setM0Value(const Double_t m0) { m0_ = m0; m0Sq_ = m0*m0; denom_ = m0Sq_ - sAdler_; }


                Double_t getB1Value() const { return b1_; }


                Double_t getB2Value() const { return b2_; }


                Double_t getAValue() const { return A_; }


                Double_t getM0Value() const { return m0_; }


                virtual LauComplex resAmp(Double_t mass, Double_t spinTerm);

                void checkDaughterTypes() const;

        private:
                Double_t mPiSq4_;
                Double_t sAdler_; 
                Double_t b1_; 
                Double_t b2_; 
                Double_t A_; 
                Double_t m0_; 
                Double_t m0Sq_; 
                Double_t denom_;

                ClassDef(LauSigmaRes,0) // Sigma resonance model

};

#endif