AFBlepton Class Reference

An observable class for the forward-backward asymmetry in \(e^+ e^-\to Z\to \ell^+ \ell^-\) at the \(Z\) pole. More...

#include <AFBlepton.h>

Inheritance diagram for AFBlepton:
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Collaboration diagram for AFBlepton:
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Detailed Description

An observable class for the forward-backward asymmetry in \(e^+ e^-\to Z\to \ell^+ \ell^-\) at the \(Z\) pole.

Author
HEPfit Collaboration

This class is used to compute the forward-backward asymmetry for an \(e^+ e^-\to Z\to \ell^+ \ell^-\) process at the \(Z\) pole in terms of the asymmetry parameters \(\mathcal{A}_f\), computed in the EW class:

\[ A_{\mathrm{FB}}^{0,\ell}=\frac 34 \mathcal{A}_e \mathcal{A}_\ell\,, \]

where \(\ell\) denotes a charged lepton, and lepton-flavour universality is assumed.

See also
EW_NPZff::AFBlepton() and the detailed description of EW class for the inclusion of new physics contribution

Definition at line 34 of file AFBlepton.h.

Public Member Functions

 AFBlepton (const StandardModel &SM_i)
 Constructor. More...
 
double computeThValue ()
 The forward-backward asymmetry for \(e^+ e^-\to Z \to \ell^+ \ell^-\) at the \(Z\) pole, \(A^{0,\ell}_{\mathrm{FB}}\). 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...
 

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

AFBlepton::AFBlepton ( const StandardModel SM_i)
inline

Constructor.

Parameters
[in]SM_ia reference to an object of type StandardModel

Definition at line 41 of file AFBlepton.h.

42  : ThObservable(SM_i)
43  {
44  };
ThObservable(const StandardModel &SM_i)
Constructor.
Definition: ThObservable.h:29

Member Function Documentation

double AFBlepton::computeThValue ( )
virtual

The forward-backward asymmetry for \(e^+ e^-\to Z \to \ell^+ \ell^-\) at the \(Z\) pole, \(A^{0,\ell}_{\mathrm{FB}}\).

Returns
\(A^{0,\ell}_{\mathrm{FB}}\)

Implements ThObservable.

Definition at line 10 of file AFBlepton.cpp.

11 {
12  return SM.AFB(SM.getLeptons(SM.ELECTRON));
13 }
Particle getLeptons(const StandardModel::lepton p) const
A get method to retrieve the member object of a lepton.
virtual double AFB(const Particle f) const
const StandardModel & SM
A reference to an object of StandardMode class.
Definition: ThObservable.h:99

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