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EvtBTo3hCP.hh
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/***********************************************************************
* Copyright 1998-2020 CERN for the benefit of the EvtGen authors *
* *
* This file is part of EvtGen. *
* *
* EvtGen is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* EvtGen is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with EvtGen. If not, see <https://www.gnu.org/licenses/>. *
***********************************************************************/
#ifndef EVTBTO3HCP_HH
#define EVTBTO3HCP_HH
#include "EvtGenBase/EvtDecayAmp.hh"
#include "EvtGenBase/EvtVector4R.hh"
class EvtParticle;
/*
struct fcomplex {
double re;
double im;
};
*/
class EvtBTo3hCP {
public:
EvtBTo3hCP();
~EvtBTo3hCP(){};
void EvtKpipi( double alpha, double beta, int iset, EvtVector4R& p_K_plus,
EvtVector4R& p_pi_minus, EvtVector4R& p_gamma_1,
EvtVector4R& p_gamma_2, double& Real_B0, double& Imag_B0,
double& Real_B0bar, double& Imag_B0bar );
void Evt3pi( double alpha, int iset, EvtVector4R& p_K_plus,
EvtVector4R& p_pi_minus, EvtVector4R& p_gamma_1,
EvtVector4R& p_gamma_2, double& Real_B0, double& Imag_B0,
double& Real_B0bar, double& Imag_B0bar );
void Evt3piMPP( double alpha, int iset, EvtVector4R& p_p1,
EvtVector4R& p_p2, EvtVector4R& p_p3, double& Real_B0,
double& Imag_B0, double& Real_B0bar, double& Imag_B0bar );
void Evt3piP00( double alpha, int iset, EvtVector4R& p_p1,
EvtVector4R& p_p1_gamma1, EvtVector4R& p_p1_gamma2,
EvtVector4R& p_p2_gamma1, EvtVector4R& p_p2_gamma2,
double& Real_B0, double& Imag_B0, double& Real_B0bar,
double& Imag_B0bar );
private:
void setConstants( double balpha, double bbeta );
int computeKpipi( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3,
double& real_B0, double& imag_B0, double& real_B0bar,
double& imag_B0bar, int set );
int compute3pi( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3,
double& real_B0, double& imag_B0, double& real_B0bar,
double& imag_B0bar, int set );
int compute3piMPP( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3,
double& real_B0, double& imag_B0, double& real_B0bar,
double& imag_B0bar, int set );
int compute3piP00( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3,
double& real_B0, double& imag_B0, double& real_B0bar,
double& imag_B0bar, int set );
// Modes are : 0 = Kpipi, 1 = 3pi, 2 = MPP, 3 = P00
void firstStep( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3, int mode );
void generateSqMasses_Kpipi( double& m12, double& m13, double& m23,
double MB2, double m1sq, double m2sq,
double m3sq );
void generateSqMasses_3pi( double& m12, double& m13, double& m23, double MB2,
double m1sq, double m2sq, double m3sq );
void generateSqMasses_3piMPP( double& m12, double& m13, double& m23,
double MB2, double m1sq, double m2sq,
double m3sq );
void generateSqMasses_3piP00( double& m12, double& m13, double& m23,
double MB2, double m1sq, double m2sq,
double m3sq );
void rotation( EvtVector4R& p, int newRot );
void gammaGamma( EvtVector4R& p, EvtVector4R& pgamma1, EvtVector4R& pgamma2 );
EvtComplex BreitWigner( EvtVector4R& p1, EvtVector4R& p2, EvtVector4R& p3,
int& ierr, double Mass = 0, double Width = 0 );
EvtComplex EvtRBW( double s, double Am2, double Gam, double Am2Min );
EvtComplex EvtCRhoF_W( double s );
EvtComplex EvtcBW_KS( double s, double Am2, double Gam );
EvtComplex EvtcBW_GS( double s, double Am2, double Gam );
double d( double AmRho2 );
double k( double s );
double Evtfs( double s, double AmRho2, double GamRho );
double h( double s );
double dh_ds( double s );
EvtComplex Mat_S1, Mat_S2, Mat_S3, Mat_S4, Mat_S5, Nat_S1, Nat_S2, Nat_S3,
Nat_S4, Nat_S5, MatKstarp, MatKstar0, MatKrho, NatKstarp, NatKstar0,
NatKrho;
double alphaCP, betaCP, pi, MA2, MB2, MC2, Mass_rho, Gam_rho, M_B, M_pip,
M_pim, M_pi0, M_Kp, Mass_Kstarp, Mass_Kstar0, Gam_Kstarp, Gam_Kstar0;
double rotMatrix[3][3];
double factor_max;
};
#endif

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