LauLASSBWRes.hh

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// Copyright University of Warwick 2008 - 2014.
// 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_LASS_BW_RES
#define LAU_LASS_BW_RES

#include "TString.h"

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


class LauLASSBWRes : public LauAbsResonance {

        public:

                LauLASSBWRes(LauResonanceInfo* resInfo, const Int_t resPairAmpInt, const LauDaughters* daughters);

                // Destructor
                virtual ~LauLASSBWRes();

                virtual void initialise();


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


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


                virtual void floatResonanceParameter(const TString& name);


                virtual LauParameter* getResonanceParameter(const TString& name);


                virtual const std::vector<LauParameter*>& getFloatingParameters();

        protected:

                void setEffectiveRange(const Double_t r);


                void setScatteringLength(const Double_t a);


                Double_t getEffectiveRange() const {return (r_!=0) ? r_->unblindValue() : 0.0;}


                Double_t getScatteringLength() const {return (a_!=0) ? a_->unblindValue() : 0.0;}


                Bool_t fixEffectiveRange() const {return (r_!=0) ? r_->fixed() : kTRUE;}


                Bool_t fixScatteringLength() const {return (a_!=0) ? a_->fixed() : kTRUE;}

                void calcQ0();


                virtual LauComplex resAmp(Double_t mass, Double_t spinTerm);

        private:
                LauLASSBWRes(const LauLASSBWRes& rhs);

                LauLASSBWRes& operator=(const LauLASSBWRes& rhs);

                Double_t q0_;
                Double_t mDaugSum_;
                Double_t mDaugSumSq_;
                Double_t mDaugDiff_;
                Double_t mDaugDiffSq_;
                Double_t resMass_;
                Double_t resMassSq_;

                LauParameter* r_;
                LauParameter* a_;

                ClassDef(LauLASSBWRes,0)
};

#endif