BdmumuOBsmumu Class Reference

A class for the ratio of the branching ratios of \(B_d\to \mu\mu\) over \(B_s\to \mu\mu\). More...

#include <BdmumuOBsmumu.h>

Inheritance diagram for BdmumuOBsmumu:

Detailed Description

A class for the ratio of the branching ratios of \(B_d\to \mu\mu\) over \(B_s\to \mu\mu\).

Author

HEPfit Collaboration

Copyright

GNU General Public License

This class is used to compute the theoretical value of the ratio of the branching ratios of \(B_d\to \mu\mu\) over \(B_s\to \mu\mu\).

Definition at line 22 of file BdmumuOBsmumu.h.

Public Member Functions
	BdmumuOBsmumu (const StandardModel &SM_i)
	Constructor. More...
double	computeThValue ()
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...

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

BdmumuOBsmumu()

BdmumuOBsmumu::BdmumuOBsmumu

(

const StandardModel &

SM_i

)

Constructor.

Parameters

[in]

SM_i

a reference to an object of type StandardModel

Definition at line 10 of file BdmumuOBsmumu.cpp.

                                                      : 
ThObservable(SM_i) 
{ 
    SM.initializeMeson(QCD::B_D);
    SM.initializeMeson(QCD::B_S);
};

Member Function Documentation

computeThValue()

double BdmumuOBsmumu::computeThValue ( )

virtual

Returns

theoretical value of | \( BR(B_d\to \mu\mu) / BR(B_s\to \mu\mu) \)|

Implements ThObservable.

Definition at line 17 of file BdmumuOBsmumu.cpp.

                                     {
    double ratio = SM.getMesons(QCD::B_D).getLifetime()/SM.getMesons(QCD::B_S).getLifetime();
    ratio *= SM.getMesons(QCD::B_D).getMass()/SM.getMesons(QCD::B_S).getMass();
    ratio *= SM.getMesons(QCD::B_D).getDecayconst()/SM.getMesons(QCD::B_S).getDecayconst();
    ratio *= SM.getMesons(QCD::B_D).getDecayconst()/SM.getMesons(QCD::B_S).getDecayconst();
    ratio *= sqrt(1.-4.*SM.getLeptons(StandardModel::MU).getMass()*SM.getLeptons(StandardModel::MU).getMass()/
            SM.getMesons(QCD::B_D).getMass()/SM.getMesons(QCD::B_D).getMass())/
            sqrt(1.-4.*SM.getLeptons(StandardModel::MU).getMass()*SM.getLeptons(StandardModel::MU).getMass()/
            SM.getMesons(QCD::B_S).getMass()/SM.getMesons(QCD::B_S).getMass());
    ratio *= SM.getVCKM()(2,0).abs2()/SM.getVCKM()(2,1).abs2();
    
    return ratio;
}

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

• BdmumuOBsmumu.h
• BdmumuOBsmumu.cpp