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:

Detailed Description

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

Author

HEPfit Collaboration

Copyright

GNU General Public License

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 2111 of file MVllObservables.h.

Public Member Functions
double	computeFLf (double qmin, QCD::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, QCD::meson meson_i, QCD::meson vector_i, QCD::lepton lep_i)
	Constructor. More...
Public Member Functions inherited from GammaPrimef
double	computeGammaPrimef (double qmin, QCD::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, QCD::meson meson_i, QCD::meson vector_i, QCD::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 StandardModel &	getModel ()
	A get method to get the model. More...
const std::vector< std::string >	getParametersForObservable ()
	A get method to get the parameters for the specific observable. 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...
void	setParametersForObservable (std::vector< std::string > parametersForObservable_i)
	A set method to get the parameters for the specific observable. More...
	ThObservable (const StandardModel &SM_i)
	Constructor. More...
	ThObservable (const ThObservable &orig)
	The copy constructor. More...
virtual	~ThObservable ()
	The default destructor. More...

Private Attributes
QCD::lepton	lep
QCD::meson	meson
QCD::meson	vectorM

Additional Inherited Members
Protected Attributes inherited from ThObservable
double	max
	the bin maximum. More...
double	min
	The bin minimum. More...
std::vector< std::string >	parametersForObservable
	a vector of parameter namesfor the specific observable More...
const StandardModel &	SM
	A reference to an object of StandardMode class. More...

Constructor & Destructor Documentation

F_Lf()

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

Constructor.

Parameters

[in]	SM_i	a reference to an object of type StandardModel
[in]	meson_i	initial meson of the decay
[in]	vector_i	final vector meson of the decay
[in]	lep_i	final leptons of the decay

Definition at line 1082 of file MVllObservables.cpp.

: GammaPrimef(SM_i, meson_i, vector_i, lep_i)
{
    lep = lep_i;
    meson = meson_i;
    vectorM = vector_i;
 
    setParametersForObservable(SM.getFlavour().getMVll(meson, vectorM, lep).initializeMVllParameters());
}

Member Function Documentation

computeFLf()

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

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

Parameters

[in]	qmin	generic value for \( q^2\)
[in]	lep	final leptons of the decay

Returns

\(F_L(q^2)\)

Definition at line 1092 of file MVllObservables.cpp.

{
    double q_min = qmin;
    QCD::lepton lep_i = lep;
 
    double sigma0 = SM.getFlavour().getMVll(meson, vectorM, lep_i).getSigma(0,q_min);
    double sigma2 = SM.getFlavour().getMVll(meson, vectorM, lep_i).getSigma(2,q_min);
 
    return (3.*sigma0 - sigma2) / (4. * computeGammaPrimef(q_min, lep_i)) ;
}

computeThValue()

double F_Lf::computeThValue ( )

virtual

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

Returns

\(F_L\)

Reimplemented from GammaPrimef.

Definition at line 1104 of file MVllObservables.cpp.

{
    double q_min = getBinMin();
 
    return computeFLf(q_min, lep);
}

Member Data Documentation

lep

QCD::lepton F_Lf::lep

private

Final leptons type.

Definition at line 2138 of file MVllObservables.h.

meson

QCD::meson F_Lf::meson

private

Initial meson type.

Definition at line 2139 of file MVllObservables.h.

vectorM

QCD::meson F_Lf::vectorM

private

Final vector meson type.

Definition at line 2140 of file MVllObservables.h.

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

• MVllObservables.h
• MVllObservables.cpp