LauLASSBWRes.hh

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/*
Copyright 2008 University of Warwick

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
Laura++ package authors:
John Back
Paul Harrison
Thomas Latham
*/

#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