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EvtBsMuMuKK.hh
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////////////////////////////////////////////////////////////////////////////////
// //
// Environment: //
// This software is part of the EvtGen package. //
// //
// Copyright Information: See EvtGen/COPYRIGHT //
// //
// Module: EvtBsMUMUKK.hh //
// //
// Description: Routine to implement Bs -> J/psi KK //
// //
// Modification history: //
// Veronika Chobanova, Jeremy Dalseno, Diego Martinez Santos //
// April 21, 2016 Module created LHCb collaboration //
// Marcos Romero Lamas //
// February 8, 2019 Module updated LHCb collaboration //
// //
////////////////////////////////////////////////////////////////////////////////
#ifndef EvtBsMuMuKK_HH
#define EvtBsMuMuKK_HH
#include "EvtGenBase/EvtComplex.hh"
#include "EvtGenBase/EvtDecayAmp.hh"
#include <string>
class EvtParticle;
class EvtBsMuMuKK : public EvtDecayAmp {
public:
std::string getName() override;
EvtDecayBase* clone() override;
void init() override;
void initProbMax() override;
void decay( EvtParticle* p ) override;
protected:
EvtComplex Flatte( const double m0, const double m ) const;
EvtComplex GetRho( const double m0, const double m ) const;
EvtComplex Breit_Wigner( const double Gamma0, const double m0,
const double m, const int J, const double q0,
const double q ) const;
double Integral( const double Gamma0, const double m0, const int JR,
const int JB, const double q0, const double M_KK_ll,
const double M_KK_ul, const int fcntype ) const;
double X_J( const int J, const double q, const int isB ) const;
double Wignerd( int J, int l, int alpha, double theta ) const;
EvtComplex AngularDist( int J, int l, int alpha, double cK, double cL,
double chi ) const;
EvtComplex AmpTime( const int q, const EvtComplex& gplus,
const EvtComplex& gminus, const double delta,
const double lambda_abs, const double Amp,
const double phis, const int eta ) const;
private:
double MBs, MJpsi, Mf0, Mphi, Mf2p, MKp, MKm, MK0, Mpip, Mpi0, Mmu;
double Gamma0phi, Gamma0f2p;
double kin_lower_limit, kin_upper_limit, kin_middle;
double p30Kp_mid_CMS, p30Kp_ll_CMS, p30Kp_phi_CMS, p30Kp_f2p_CMS;
double p30Jpsi_mid_CMS, p30Jpsi_ll_CMS, p30Jpsi_phi_CMS, p30Jpsi_f2p_CMS;
double int_const_NR, int_Flatte_f0, int_BW_phi, int_BW_f2p;
double f_S_NR, f_f0, f_phi, f_f2p, f_phi_0, f_phi_perp, f_f2p_0, f_f2p_perp;
double A_S_NR, A_f0, A_phi_0, A_phi_perp, A_phi_par, A_f2p_0, A_f2p_perp;
double A_f2p_par;
double delta_S_NR, delta_f0, delta_phi_0, delta_phi_perp, delta_phi_par;
double delta_f2p_0, delta_f2p_perp, delta_f2p_par;
double phis_S_NR, phis_f0, phis_phi_0, phis_phi_perp, phis_phi_par;
double phis_f2p_0, phis_f2p_perp, phis_f2p_par;
double lambda_S_NR_abs, lambda_f0_abs, lambda_phi_0_abs, lambda_phi_perp_abs;
double lambda_phi_par_abs, lambda_f2p_0_abs, lambda_f2p_perp_abs;
double lambda_f2p_par_abs;
double Gamma, deltaGamma, ctau, deltaMs;
};
#endif

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