EvtHQET2FF Class Reference

#include <EvtHQET2FF.hh>

Inheritance diagram for EvtHQET2FF:

Public Member Functions
	EvtHQET2FF (double hqetrho2, double hqetha1_1, double hqetr1_1, double hqetr2_1)
	EvtHQET2FF (double hqetrho2, double hqetv1_1)
void	getvectorff (EvtId parent, EvtId daught, double t, double mass, double *a1f, double *a2f, double *vf, double *a0f)
void	getscalarff (EvtId parent, EvtId daught, double t, double mass, double *f0p, double *f0m)
Public Member Functions inherited from EvtSemiLeptonicFF
virtual void	gettensorff (EvtId parent, EvtId daught, double t, double mass, double *a1f, double *a2f, double *vf, double *a0f)
virtual void	getbaryonff (EvtId parent, EvtId daught, double t, double m_meson, double *f1v, double *f1a, double *f2v, double *f2a)

Detailed Description

Definition at line 20 of file EvtHQET2FF.hh.

Constructor & Destructor Documentation

EvtHQET2FF() [1/2]

EvtHQET2FF::EvtHQET2FF	(	double	hqetrho2,
		double	hqetha1_1,
		double	hqetr1_1,
		double	hqetr2_1 )

Definition at line 22 of file EvtHQET2FF.cc.

                                                                                            {
 
  rho2  = hqetrho2;
  r1_1  = hqetr1_1;
  r2_1  = hqetr2_1;
  ha1_1 = hqetha1_1;
 
  return;
}

EvtHQET2FF() [2/2]

EvtHQET2FF::EvtHQET2FF	(	double	hqetrho2,
		double	hqetv1_1 )

Definition at line 32 of file EvtHQET2FF.cc.

                                                         {
 
  rho2 = hqetrho2;
  v1_1 = hqetv1_1;
 
  return;
}

Member Function Documentation

getscalarff()

void EvtHQET2FF::getscalarff ( EvtId parent, EvtId daught, double t, double mass, double * f0p, double * f0m )

virtual

Reimplemented from EvtSemiLeptonicFF.

Definition at line 40 of file EvtHQET2FF.cc.

                                            {
 
  double mb = EvtPDL::getMeanMass( parent );
  double w  = ( ( mb * mb ) + ( mass * mass ) - t ) / ( 2.0 * mb * mass );
 
  // Form factors have a general form, with parameters passed in
  // from the arguements.
 
  // Use disparsion relation parametrization from
  // I.Caprini, L.Lelluch, M.Neubert, Nucl. Phys. B 530,153(1998)
  const double z  = ( sqrt( w + 1 ) - sqrt( 2. ) ) / ( sqrt( w + 1 ) + sqrt( 2. ) );
  double       v1 = v1_1 * ( 1. - 8. * rho2 * z + ( 51. * rho2 - 10. ) * z * z -
                       ( 252. * rho2 - 84. ) * z * z * z );
 
  *f0p = v1;
  *f0m = 0.0;
 
  return;
}

getvectorff()

void EvtHQET2FF::getvectorff ( EvtId parent, EvtId daught, double t, double mass, double * a1f, double * a2f, double * vf, double * a0f )

virtual

Reimplemented from EvtSemiLeptonicFF.

Definition at line 61 of file EvtHQET2FF.cc.

                                                                     {
 
  double mb = EvtPDL::getMeanMass( parent );
  double w  = ( ( mb * mb ) + ( mass * mass ) - t ) / ( 2.0 * mb * mass );
 
  // Form factors have a general form, with parameters passed in
  // from the arguements.
 
  double rstar = ( 2.0 * sqrt( mb * mass ) ) / ( mb + mass );
 
  // Use disparsion relation parametrization from
  // I.Caprini, L.Lelluch, M.Neubert, Nucl. Phys. B 530,153(1998)
  const double z   = ( sqrt( w + 1 ) - sqrt( 2. ) ) / ( sqrt( w + 1 ) + sqrt( 2. ) );
  double       ha1 = ha1_1 * ( 1. - 8. * rho2 * z + ( 53. * rho2 - 15. ) * z * z -
                         ( 231. * rho2 - 91. ) * z * z * z );
  double       r1  = r1_1 - 0.12 * ( w - 1 ) + 0.05 * ( w - 1 ) * ( w - 1 );
  double       r2  = r2_1 + 0.11 * ( w - 1 ) - 0.06 * ( w - 1 ) * ( w - 1 );
  ;
 
  *a1f = ( 1.0 - ( t / ( ( mb + mass ) * ( mb + mass ) ) ) ) * ha1;
  *a1f = ( *a1f ) / rstar;
  *a2f = ( r2 / rstar ) * ha1;
  *vf  = ( r1 / rstar ) * ha1;
  *a0f = 0.0;
 
  return;
}

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The documentation for this class was generated from the following files:

• EvtHQET2FF.hh
• EvtHQET2FF.cc