F_L Class Reference

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

#include <MVllObservables.h>

Inheritance diagram for F_L:

Detailed Description

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

Author

HEPfit Collaboration

Copyright

GNU General Public License

This class is used to compute the binned observable \(<F_L>\) in \(M \to V l^+l^-\) in terms of the binned 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 433 of file MVllObservables.h.

Public Member Functions
double	computeFL (double qmin, double qmax, QCD::lepton lep)
	A method to compute the binned observable \(<F_L>\) in \(M \to V l^+l^-\) in a generic bin. More...
double	computeThValue ()
	The binned observable \(<F_L>\) in \(M \to V l^+l^-\). More...
	F_L (const StandardModel &SM_i, QCD::meson meson_i, QCD::meson vector_i, QCD::lepton lep_i)
	Constructor. More...
Public Member Functions inherited from GammaPrime
double	computeGammaPrime (double qmin, double qmax, QCD::lepton lep)
	A method to compute the binned observable \(<\Gamma'>\) in \(M \to V l^+l^-\) in a generic bin. More...
	GammaPrime (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_L()

F_L::F_L	(	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 368 of file MVllObservables.cpp.

: GammaPrime(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

computeFL()

double F_L::computeFL	(	double	qmin,
		double	qmax,
		QCD::lepton	lep
	)

A method to compute the binned observable \(<F_L>\) in \(M \to V l^+l^-\) in a generic bin.

Parameters

[in]	qmin	minimal value of the bin
[in]	qmax	maximal value of the bin
[in]	lep	final leptons of the decay

Returns

\(<F_L>_{[qmin,qmax]}\)

Definition at line 378 of file MVllObservables.cpp.

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

computeThValue()

double F_L::computeThValue ( )

virtual

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

Returns

\(<F_L>\)

Reimplemented from GammaPrime.

Reimplemented in RL_MVll, and RT_MVll.

Definition at line 390 of file MVllObservables.cpp.

{
    double q_min = getBinMin();
    double q_max = getBinMax();
 
    return computeFL(q_min, q_max, lep);
}

Member Data Documentation

lep

QCD::lepton F_L::lep

private

Final leptons type.

Definition at line 461 of file MVllObservables.h.

meson

QCD::meson F_L::meson

private

Initial meson type.

Definition at line 462 of file MVllObservables.h.

vectorM

QCD::meson F_L::vectorM

private

Final vector meson type.

Definition at line 463 of file MVllObservables.h.

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

• MVllObservables.h
• MVllObservables.cpp