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:
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Collaboration diagram for M_2Prime:
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Detailed Description

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

Author
HEPfit Collaboration

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, 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

M_2Prime::M_2Prime ( 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 349 of file MVllObservables.cpp.

350 : ThObservable(SM_i)
351 {
352  lep = lep_i;
353  meson = meson_i;
354  vectorM = vector_i;
355 }
StandardModel::lepton lep
StandardModel::meson vectorM
StandardModel::meson meson
ThObservable(const StandardModel &SM_i)
Constructor.
Definition: ThObservable.h:29

Member Function Documentation

double M_2Prime::computeThValue ( )
virtual

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

Returns
\(M_2'\)

Implements ThObservable.

Definition at line 357 of file MVllObservables.cpp.

358 {
359  double q_min = getBinMin();
360 
362  ( SM.getMyFlavour()->getMVll(meson, vectorM, lep)->H_V_0(q_min).abs2() + SM.getMyFlavour()->getMVll(meson, vectorM, lep)->H_A_0(q_min).abs2() );
363 }
double abs2() const
StandardModel::lepton lep
StandardModel::meson vectorM
double getBinMin()
A get method to get the minimum value of the bin.
Definition: ThObservable.h:79
gslpp::complex H_A_0(double q2)
The helicity amplitude .
Definition: MVll.cpp:1388
gslpp::complex H_S(double q2)
The helicity amplitude .
Definition: MVll.cpp:1403
double beta(double q2)
The factor used in the angular coefficients .
Definition: MVll.cpp:1421
StandardModel::meson meson
Flavour * getMyFlavour() const
const StandardModel & SM
A reference to an object of StandardMode class.
Definition: ThObservable.h:99
gslpp::complex H_P(double q2)
The helicity amplitude .
Definition: MVll.cpp:1408
gslpp::complex H_V_0(double q2)
The helicity amplitude .
Definition: MVll.cpp:1373
double getMlep()
The mass of the lepton l.
Definition: MVll.h:143
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

Member Data Documentation

StandardModel::lepton M_2Prime::lep
private

Final leptons type.

Definition at line 781 of file MVllObservables.h.

StandardModel::meson M_2Prime::meson
private

Initial meson type.

Definition at line 782 of file MVllObservables.h.

StandardModel::meson M_2Prime::vectorM
private

Final vector meson type.

Definition at line 783 of file MVllObservables.h.


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