LauPolarFormFactorNR.hh

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/*
Copyright 2018 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_POLAR_FORM_FACTOR_NR
#define LAU_POLAR_FORM_FACTOR_NR

#include "TString.h"

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

class LauKinematics;
class LauParameter;


class LauPolarFormFactorNR : public LauAbsResonance {

        public:

                LauPolarFormFactorNR(LauResonanceInfo* resInfo, const LauAbsResonance::LauResonanceModel resType, 
                              const Int_t resPairAmpInt, const LauDaughters* daughters);

                virtual ~LauPolarFormFactorNR();

                virtual void initialise();


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


                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 setLambda(const Double_t lambda);


                Double_t getLambda() const {return (lambda_!=0) ? lambda_->value() : 0.0;}


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


                virtual LauComplex resAmp(Double_t mass, Double_t spinTerm);

        private:
                LauPolarFormFactorNR(const LauPolarFormFactorNR& rhs);

                LauPolarFormFactorNR& operator=(const LauPolarFormFactorNR& rhs);

                LauParameter* lambda_;

                LauAbsResonance::LauResonanceModel model_;

                ClassDef(LauPolarFormFactorNR,0)
};

#endif