F_Lf Class Reference

A class for the observable \(F_L\) in \(M \to V l^+l^-\). More...

#include <MVllObservables.h>

Inheritance diagram for F_Lf:
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Collaboration diagram for F_Lf:
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Detailed Description

A class for the observable \(F_L\) in \(M \to V l^+l^-\).

Author
HEPfit Collaboration

This class is used to compute the observable \(F_L\) in \(M \to V l^+l^-\) in terms of the CP averaged helicity coefficients \(\Sigma_i\), computed in the MVll class, and the meson width \(M_W\):

\[ BR= \frac {3\Sigma_{1c}-\Sigma_{2c}}{4\Gamma'} \,. \]

Definition at line 2064 of file MVllObservables.h.

Public Member Functions

double computeFLf (double qmin, StandardModel::lepton lep)
 A method to compute the observable \(F_L\) in \(M \to V l^+l^-\) at a generic \( q^2\). More...
 
double computeThValue ()
 The observable \(F_L\) in \(M \to V l^+l^-\). More...
 
 F_Lf (const StandardModel &SM_i, StandardModel::meson meson_i, StandardModel::meson vector_i, StandardModel::lepton lep_i)
 Constructor. More...
 
- Public Member Functions inherited from GammaPrimef
double computeGammaPrimef (double qmin, StandardModel::lepton lep)
 A method to compute the observable \(\Gamma'\) in \(M \to V l^+l^-\) at a generic \(q^2\). More...
 
 GammaPrimef (const StandardModel &SM_i, StandardModel::meson meson_i, StandardModel::meson vector_i, StandardModel::lepton lep_i)
 Constructor. More...
 
- Public Member Functions inherited from ThObservable
double getBinMax ()
 A get method to get the maximum value of the bin. More...
 
double getBinMin ()
 A get method to get the minimum value of the bin. More...
 
const StandardModelgetModel ()
 A get method to get the model. More...
 
void setBinMax (double max)
 A set method to set the maximum value of the bin. More...
 
void setBinMin (double min)
 A set method to set the minimum value of the bin. More...
 
 ThObservable (const StandardModel &SM_i)
 Constructor. More...
 
 ThObservable (const ThObservable &orig)
 The copy constructor. More...
 
virtual ~ThObservable ()
 The default destructor. More...
 

Private Attributes

StandardModel::lepton lep
 
StandardModel::meson meson
 
StandardModel::meson vectorM
 

Additional Inherited Members

- Protected Attributes inherited from ThObservable
double max
 the bin maximum. More...
 
double min
 The bin minimum. More...
 
const StandardModelSM
 A reference to an object of StandardMode class. More...
 

Constructor & Destructor Documentation

F_Lf::F_Lf ( const StandardModel SM_i,
StandardModel::meson  meson_i,
StandardModel::meson  vector_i,
StandardModel::lepton  lep_i 
)

Constructor.

Parameters
[in]SM_ia reference to an object of type StandardModel
[in]meson_iinitial meson of the decay
[in]vector_ifinal vector meson of the decay
[in]lep_ifinal leptons of the decay

Definition at line 906 of file MVllObservables.cpp.

907 : GammaPrimef(SM_i, meson_i, vector_i, lep_i)
908 {
909  lep = lep_i;
910  meson = meson_i;
911  vectorM = vector_i;
912 }
StandardModel::meson vectorM
StandardModel::meson meson
StandardModel::lepton lep
GammaPrimef(const StandardModel &SM_i, StandardModel::meson meson_i, StandardModel::meson vector_i, StandardModel::lepton lep_i)
Constructor.

Member Function Documentation

double F_Lf::computeFLf ( double  qmin,
StandardModel::lepton  lep 
)

A method to compute the observable \(F_L\) in \(M \to V l^+l^-\) at a generic \( q^2\).

Parameters
[in]qmingeneric value for \( q^2\)
[in]lepfinal leptons of the decay
Returns
\(F_L(q^2)\)

Definition at line 914 of file MVllObservables.cpp.

915 {
916  double q_min = qmin;
917  StandardModel::lepton lep_i = lep;
918 
919  double sigma0 = SM.getMyFlavour()->getMVll(meson, vectorM, lep_i)->getSigma(0,q_min);
920  double sigma2 = SM.getMyFlavour()->getMVll(meson, vectorM, lep_i)->getSigma(2,q_min);
921 
922  return (3.*sigma0 - sigma2) / (4. * computeGammaPrimef(q_min, lep_i)) ;
923 }
double computeGammaPrimef(double qmin, StandardModel::lepton lep)
A method to compute the observable in at a generic .
StandardModel::meson vectorM
StandardModel::meson meson
Flavour * getMyFlavour() const
const StandardModel & SM
A reference to an object of StandardMode class.
Definition: ThObservable.h:99
StandardModel::lepton lep
MVll * getMVll(StandardModel::meson meson_i, StandardModel::meson vector_i, StandardModel::lepton lep_i)
Returns the initial and final state dependent object for .
Definition: Flavour.h:199
double getSigma(int i, double q_2)
The value of from to .
Definition: MVll.cpp:1630
lepton
An enum type for leptons.
double F_Lf::computeThValue ( )
virtual

The observable \(F_L\) in \(M \to V l^+l^-\).

Returns
\(F_L\)

Reimplemented from GammaPrimef.

Definition at line 926 of file MVllObservables.cpp.

927 {
928  double q_min = getBinMin();
929 
930  return computeFLf(q_min, lep);
931 }
double computeFLf(double qmin, StandardModel::lepton lep)
A method to compute the observable in at a generic .
double getBinMin()
A get method to get the minimum value of the bin.
Definition: ThObservable.h:79
StandardModel::lepton lep

Member Data Documentation

StandardModel::lepton F_Lf::lep
private

Final leptons type.

Definition at line 2091 of file MVllObservables.h.

StandardModel::meson F_Lf::meson
private

Initial meson type.

Definition at line 2092 of file MVllObservables.h.

StandardModel::meson F_Lf::vectorM
private

Final vector meson type.

Definition at line 2093 of file MVllObservables.h.


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