M_2Prime Class Reference

A class for the observable \(M_2'\) in \(M \to V l^+l^-\). More...

#include <MVllObservables.h>

Inheritance diagram for M_2Prime:

Detailed Description

A class for the observable \(M_2'\) in \(M \to V l^+l^-\).

Author

HEPfit Collaboration

Copyright

GNU General Public License

This class is used to compute the observable \(M_2'\) in \(M \to V l^+l^-\) in terms of the helicity amplitudes \(H_{A,V}^0,\,H_{P,S}\) computed in the MVll class:

\[ M_2'= \frac {q^2/(2m_l^2)^2(|H_P|^2 + \beta|H_S|^2) + (|H_V^0|^2 - |H_A^0|^2)}{|H_V^0|^2 + |H_A^0|^2} \,. \]

Definition at line 762 of file MVllObservables.h.

Public Member Functions
double	computeThValue ()
	The observable \(M_2'\) in \(M \to V l^+l^-\). More...
	M_2Prime (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

M_2Prime()

M_2Prime::M_2Prime	(	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 418 of file MVllObservables.cpp.

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

Member Function Documentation

computeThValue()

double M_2Prime::computeThValue ( )

virtual

The observable \(M_2'\) in \(M \to V l^+l^-\).

Returns

\(M_2'\)

Implements ThObservable.

Definition at line 428 of file MVllObservables.cpp.

{
    double q_min = getBinMin();
 
    return ( q_min/(2.*SM.getFlavour().getMVll(meson, vectorM, lep).getMlep()*SM.getFlavour().getMVll(meson, vectorM, lep).getMlep())*( SM.getFlavour().getMVll(meson, vectorM, lep).H_P(q_min, 0).abs2() + SM.getFlavour().getMVll(meson, vectorM, lep).beta(q_min)*SM.getFlavour().getMVll(meson, vectorM, lep).beta(q_min)*SM.getFlavour().getMVll(meson, vectorM, lep).H_S(q_min, 0).abs2() ) + SM.getFlavour().getMVll(meson, vectorM, lep).H_V_0(q_min, 0).abs2() - SM.getFlavour().getMVll(meson, vectorM, lep).H_A_0(q_min, 0).abs2() )/
            ( SM.getFlavour().getMVll(meson, vectorM, lep).H_V_0(q_min, 0).abs2() + SM.getFlavour().getMVll(meson, vectorM, lep).H_A_0(q_min, 0).abs2() );
}

Member Data Documentation

lep

QCD::lepton M_2Prime::lep

private

Final leptons type.

Definition at line 781 of file MVllObservables.h.

meson

QCD::meson M_2Prime::meson

private

Initial meson type.

Definition at line 782 of file MVllObservables.h.

vectorM

QCD::meson M_2Prime::vectorM

private

Final vector meson type.

Definition at line 783 of file MVllObservables.h.

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

• MVllObservables.h
• MVllObservables.cpp