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EvtLambdaB2LambdaV.hh
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EvtLambdaB2LambdaV.hh
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//------------------------------------------------------------------------
//
// Module: EvtGen/EvtLambdaB2LambdaV.hh
//
// Description:
// Class to generate LambdaB -> Lambda(p pi) V(Vp Vm) decays
// with V a vector meson such as J/psi (mu+mu-)
// Rho (pi+pi-)
// Omega (pi+pi-)
// Rho-omega mixing (pi+pi-)
//
// Author : Eric Conte (LPC Clermont-Ferrand)
// econte@clermont.in2p3.fr / ziad@clermont.in2p3.fr
//
// Modification history:
//
// E. Conte April 13, 2006 Module created
// E. Conte February 5, 2006 First draft
//
//------------------------------------------------------------------------
#ifndef EVTLAMBDAB2LAMBDAV_HH
#define EVTLAMBDAB2LAMBDAV_HH
#include <stdlib.h>
#include <string>
#include "EvtGenBase/EvtDecayProb.hh"
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtReport.hh"
namespace VID
{
enum VectorMesonType{JPSI, OMEGA, RHO, RHO_OMEGA_MIXING};
}
//*******************************************************************
//* *
//* Class EvtLambdaB2LambdaV *
//* *
//*******************************************************************
//
// DECAY : LambdaB -> Lambda + vector meson
//
// d(Sigma)
// -------- = 1 + A*B*cos(theta) + 2*A*Re(C*exp(i*phi))*sin(theta)
// d(Omega)
//
// with A (real) : lambdaB helicity asymmetry parameter
// B (real) : lambdaB polarisation
// C (complex) : lambdaB density matrix element rho+-
//
// cf : O. Leitner, Z.J Ajaltouni, E. Conte,
// PCCF RI 0601, ECT-05-15, LPNHE/2006-01, hep-ph/0602043
class EvtLambdaB2LambdaV:public EvtDecayProb
{
public:
EvtLambdaB2LambdaV();
virtual ~EvtLambdaB2LambdaV();
EvtDecayBase* clone();
virtual std::string getName();
void init();
void initProbMax();
void decay(EvtParticle *lambdab);
private:
//class name for report method
std::string fname;
//meson vector identity
VID::VectorMesonType Vtype;
//decay dynamics parameters
double A;
double B;
EvtComplex C;
//V mass generator method
double getVMass(double MASS_LAMBDAB, double MASS_LAMBDA);
//PDF generator method
double BreitWignerRelPDF(double m,double _m0, double _g0);
double RhoOmegaMixingPDF(double m, double _mr, double _gr, double _mo, double _go);
};
//*******************************************************************
//* *
//* Class EvtLambda2PPiForLambdaB2LambdaV *
//* *
//*******************************************************************
//
// DECAY : Lambda -> p + pi-
//
// d(Sigma)
// -------- = 1 + A*B*cos(theta) + 2*A*Re(D*exp(i*phi))*sin(theta)
// d(Omega)
//
// with A (real) : lambda asymmetry parameter
// B (real) : lambda polarisation
// C (real) : lambdaB polarisation
// D (complex) : lambda density matrix element rho+-
//
// cf : O. Leitner, Z.J Ajaltouni, E. Conte
// PCCF RI 0601, ECT-05-15, LPNHE/2006-01, hep-ph/0602043
class EvtLambda2PPiForLambdaB2LambdaV:public EvtDecayProb
{
public:
EvtLambda2PPiForLambdaB2LambdaV();
virtual ~EvtLambda2PPiForLambdaB2LambdaV();
EvtDecayBase* clone();
virtual std::string getName();
void init();
void initProbMax();
void decay(EvtParticle *lambda);
private :
//class name for report method
std::string fname;
//meson vector identity
VID::VectorMesonType Vtype;
//decay dynamics parameters
double A;
double B;
double C;
EvtComplex D;
};
//*******************************************************************
//* *
//* Class EvtV2VpVmForLambdaB2LambdaV *
//* *
//*******************************************************************
//
// DECAY : vector meson V -> Vp + Vm
//
// d(Sigma)
// -------- = (1-3A)*cos(theta)^2 + (1+A) //leptonic decays
// d(Omega)
//
// d(Sigma)
// -------- = (3A-1)*cos(theta)^2 + (1-A) //hadronic decays
// d(Omega)
//
// with A (real) : V density matrix element indicating the
// probability to be longitudinally polarized
//
// cf : O. Leitner, Z.J Ajaltouni, E. Conte
// PCCF RI 0601, ECT-05-15, LPNHE/2006-01, hep-ph/0602043
class EvtV2VpVmForLambdaB2LambdaV:public EvtDecayProb
{
public:
EvtV2VpVmForLambdaB2LambdaV();
virtual ~EvtV2VpVmForLambdaB2LambdaV();
EvtDecayBase* clone();
virtual std::string getName();
void init();
void initProbMax();
void decay(EvtParticle *V);
private:
//class name for report method
std::string fname;
//meson vector identity
VID::VectorMesonType Vtype;
//decay dynamics parameters
double A;
};
#endif

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