LauLASSBWRes.hh

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

#include "TString.h"

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


class LauLASSBWRes : public LauAbsResonance {

        public:

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

                // Destructor
                virtual ~LauLASSBWRes();

                virtual void initialise();


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


                virtual Double_t getEffectiveRange() {return r_;}

                virtual Double_t getScatteringLength() {return a_;}

                virtual Double_t getBackgroundMag() {return B_;}

                virtual Double_t getResonanceMag() {return R_;}

                virtual Double_t getBackgroundPhase() {return phiB_;}

                virtual Double_t getResonancePhase() {return phiR_;}

                virtual Double_t getCutOff() {return cutOff_;}


                virtual void setEffectiveRange(Double_t r) {r_ = r;}

                virtual void setScatteringLength(Double_t a) {a_ = a;}

                virtual void setBackgroundMag(Double_t B) {B_ = B;}

                virtual void setResonanceMag(Double_t R) {R_ = R;}

                virtual void setBackgroundPhase(Double_t phiB) {phiB_ = phiB;}

                virtual void setResonancePhase(Double_t phiR) {phiR_ = phiR;}

                virtual void setCutOff(Double_t cutOff) {cutOff_ = cutOff;}


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

        protected:

                virtual LauComplex resAmp(Double_t mass, Double_t spinTerm);

        private:
                Double_t q0_; 
                Double_t mDaugSum_;
                Double_t mDaugSumSq_;
                Double_t mDaugDiff_;
                Double_t mDaugDiffSq_; 
                Double_t resMassSq_;
                Double_t r_; 
                Double_t a_;
                Double_t B_;
                Double_t R_;
                Double_t phiB_; 
                Double_t phiR_;
                Double_t cutOff_;

                ClassDef(LauLASSBWRes,0) // LASS resonance model
};

#endif