Detailed Description

The \(b\to s\gamma\) branching fraction from tabled values.

Author: HEPfit Collaboration

Copyright: GNU General Public License

The branching ratio \(BR(B\to X_s \gamma)\) for the type II is read from a table and interpolated. The tabled values are state-of-the-art calculations at NNLO from [Misiak:2015xwa] in a grid of 11 \(\log_{10}(\tan \beta)\) values between -4/3 and 2 times 101 \(\log_{10}(m_{H^+})\) values between 1 and 4. The theoretical error is evaluated at every point and found to be almost constant at 7%, which is accounted for by the nuisance parameter bsgamma_theoryerror.

Definition at line 28 of file bsgammaTHDM.h.

Public Member Functions
	bsgammaTHDM (const StandardModel &SM_i)

double	computeThValue ()
	Calculates the \(BR(B\to X_s \gamma)\) value in the THDM by linear interpolation of tabled NNLO values.

virtual	~bsgammaTHDM ()

Public Member Functions inherited from ThObservable
double	getBinMax ()
	A get method to get the maximum value of the bin.

double	getBinMin ()
	A get method to get the minimum value of the bin.

const StandardModel &	getModel ()
	A get method to get the model.

const std::vector< std::string >	getParametersForObservable ()
	A get method to get the parameters for the specific observable.

void	setBinMax (double max)
	A set method to set the maximum value of the bin.

void	setBinMin (double min)
	A set method to set the minimum value of the bin.

void	setParametersForObservable (std::vector< std::string > parametersForObservable_i)
	A set method to get the parameters for the specific observable.

	ThObservable (const StandardModel &SM_i)
	Constructor.

	ThObservable (const ThObservable &orig)
	The copy constructor.

virtual	~ThObservable ()
	The default destructor.

Protected Attributes
THDMcache *	mycache

Protected Attributes inherited from ThObservable
double	max
	the bin maximum.

double	min
	The bin minimum.

std::vector< std::string >	parametersForObservable
	a vector of parameter namesfor the specific observable

const StandardModel &	SM
	A reference to an object of StandardMode class.

Private Attributes
const THDM *	myTHDM

Constructor & Destructor Documentation

◆ bsgammaTHDM()

bsgammaTHDM::bsgammaTHDM ( const StandardModel & SM_i )

Definition at line 12 of file bsgammaTHDM.cpp.

                                                 : 
 
        ThObservable(SM_i), 
        myTHDM(static_cast<const THDM*> (&SM_i))
{
    mycache = new THDMcache(SM_i);
}

◆ ~bsgammaTHDM()

bsgammaTHDM::~bsgammaTHDM ( )

virtual

Definition at line 20 of file bsgammaTHDM.cpp.

{
    if (mycache != NULL) delete(mycache);
}

Member Function Documentation

◆ computeThValue()

double bsgammaTHDM::computeThValue ( )

virtual

Calculates the \(BR(B\to X_s \gamma)\) value in the THDM by linear interpolation of tabled NNLO values.

Returns: \(BR(B\to X_s \gamma)\).

Implements ThObservable.

Definition at line 25 of file bsgammaTHDM.cpp.

{
    std::string modelflag=myTHDM->getModelTypeflag();
    if (modelflag == "type2" || modelflag == "typeY" ) {
        double logtb=myTHDM->getlogtb();
        double logmHp=log10(myTHDM->getmHp());
        double B_BXsgamma_ctrl=mycache->ip_ex_bsgamma(logtb,logmHp);
        double B_BXsgamma_err=0.07;
        double bsgamma_theoryerror=myTHDM->getbsgamma_theoryerror();
 
        return B_BXsgamma_ctrl * (1.0 + B_BXsgamma_err * bsgamma_theoryerror);
    }
    else {
        throw std::runtime_error("flag_model in bsgammaTHDM::computeThValue() can only be \"type2\" or \"typeY\" at the moment");
        return 0.;
    }
}

Member Data Documentation

◆ mycache

THDMcache* bsgammaTHDM::mycache

protected

Definition at line 40 of file bsgammaTHDM.h.

◆ myTHDM

const THDM* bsgammaTHDM::myTHDM

private

Definition at line 43 of file bsgammaTHDM.h.

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