tau_3mu Class Reference

A class for calculating the branching ratio of the process \( \tau \to \mu \mu \mu \). More...

#include <li_3lj.h>

Inheritance diagram for tau_3mu:

Detailed Description

A class for calculating the branching ratio of the process \( \tau \to \mu \mu \mu \).

Author

HEPfit Collaboration

Copyright

GNU General Public License

The tau_3mu class calculates the branching ratio of the process \( \tau \to \mu \mu \mu \) in the model.

Definition at line 95 of file li_3lj.h.

Public Member Functions
double	computeThValue ()
	tau_3mu (const StandardModel &SM_i)
	Calculates the value of the process \( \tau \to \mu \mu \mu \). 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...

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

tau_3mu()

tau_3mu::tau_3mu

(

const StandardModel &

SM_i

)

Calculates the value of the process \( \tau \to \mu \mu \mu \).

Returns

value of the process \( \tau \to \mu \mu \mu \)

Definition at line 167 of file li_3lj.cpp.

: ThObservable(SM_i)
{}

Member Function Documentation

computeThValue()

double tau_3mu::computeThValue ( )

virtual

Returns

value of the process \( \tau \to \mu \mu \mu \)

Implements ThObservable.

Definition at line 180 of file li_3lj.cpp.

{
    double alph = SM.getAle();
    double mMU = SM.getLeptons(StandardModel::MU).getMass();
    double mTAU = SM.getLeptons(StandardModel::TAU).getMass();
    double GammaTAU = 2.26735e-12;
 
    gslpp::vector<gslpp::complex> ** allcoeff_t3m = SM.getMyLeptonFlavour()->ComputeCoeffli_3lj(2);
 
    double Brtau3mu = alph*alph/(32.0*M_PI) * pow(mTAU,5.0)
                    * ((*(allcoeff_t3m[LO]))(1).abs2()+(*(allcoeff_t3m[LO]))(0).abs2()
                       -4.0*((*(allcoeff_t3m[LO]))(1)*(*(allcoeff_t3m[LO]))(2).conjugate()+(*(allcoeff_t3m[LO]))(3)*(*(allcoeff_t3m[LO]))(0).conjugate()).real()
                       +((*(allcoeff_t3m[LO]))(3).abs2()+(*(allcoeff_t3m[LO]))(2).abs2())*(16.0*log(mTAU/mMU)-22.0)/3.0
                       +((*(allcoeff_t3m[LO]))(5).abs2()+(*(allcoeff_t3m[LO]))(4).abs2())/6.0
                       +(((*(allcoeff_t3m[LO]))(7)+(*(allcoeff_t3m[LO]))(13)).abs2()+((*(allcoeff_t3m[LO]))(6)+(*(allcoeff_t3m[LO]))(12)).abs2())/3.0
                       +(((*(allcoeff_t3m[LO]))(9)+(*(allcoeff_t3m[LO]))(15)).abs2()+((*(allcoeff_t3m[LO]))(8)+(*(allcoeff_t3m[LO]))(14)).abs2())/24.0
                       +((*(allcoeff_t3m[LO]))(11).abs2()+(*(allcoeff_t3m[LO]))(10).abs2())*6.0
                       -(((*(allcoeff_t3m[LO]))(9)+(*(allcoeff_t3m[LO]))(15))*(*(allcoeff_t3m[LO]))(11).conjugate()+((*(allcoeff_t3m[LO]))(8)+(*(allcoeff_t3m[LO]))(14))*(*(allcoeff_t3m[LO]))(10).conjugate()).real()
                       +((*(allcoeff_t3m[LO]))(1)*(*(allcoeff_t3m[LO]))(5).conjugate()+(*(allcoeff_t3m[LO]))(0)*(*(allcoeff_t3m[LO]))(4).conjugate()
                         +(*(allcoeff_t3m[LO]))(1)*((*(allcoeff_t3m[LO]))(7)+(*(allcoeff_t3m[LO]))(13)).conjugate()+(*(allcoeff_t3m[LO]))(0)*((*(allcoeff_t3m[LO]))(6)+(*(allcoeff_t3m[LO]))(12)).conjugate()).real()*2.0/3.0
                       -4.0*((*(allcoeff_t3m[LO]))(2)*(*(allcoeff_t3m[LO]))(5).conjugate()+(*(allcoeff_t3m[LO]))(3)*(*(allcoeff_t3m[LO]))(4).conjugate()
                             +(*(allcoeff_t3m[LO]))(3)*((*(allcoeff_t3m[LO]))(6)+(*(allcoeff_t3m[LO]))(12)).conjugate()+(*(allcoeff_t3m[LO]))(2)*((*(allcoeff_t3m[LO]))(7)+(*(allcoeff_t3m[LO]))(13)).conjugate()).real()/3.0
                       +2.0*((*(allcoeff_t3m[LO]))(19).abs2()+(*(allcoeff_t3m[LO]))(16).abs2())/3.0
                       +((*(allcoeff_t3m[LO]))(18).abs2()+(*(allcoeff_t3m[LO]))(17).abs2())/3.0
                       +((*(allcoeff_t3m[LO]))(5)*(*(allcoeff_t3m[LO]))(19).conjugate()+(*(allcoeff_t3m[LO]))(4)*(*(allcoeff_t3m[LO]))(16).conjugate()
                         +((*(allcoeff_t3m[LO]))(7)+(*(allcoeff_t3m[LO]))(13))*(*(allcoeff_t3m[LO]))(18).conjugate()+((*(allcoeff_t3m[LO]))(6)+(*(allcoeff_t3m[LO]))(12))*(*(allcoeff_t3m[LO]))(17).conjugate()).real()*2.0/3.0
                       +((*(allcoeff_t3m[LO]))(1)*(*(allcoeff_t3m[LO]))(19).conjugate()+(*(allcoeff_t3m[LO]))(0)*(*(allcoeff_t3m[LO]))(16).conjugate()).real()*4.0/3.0
                       +((*(allcoeff_t3m[LO]))(1)*(*(allcoeff_t3m[LO]))(18).conjugate()+(*(allcoeff_t3m[LO]))(0)*(*(allcoeff_t3m[LO]))(17).conjugate()).real()*2.0/3.0
                       -((*(allcoeff_t3m[LO]))(2)*(*(allcoeff_t3m[LO]))(19).conjugate()+(*(allcoeff_t3m[LO]))(3)*(*(allcoeff_t3m[LO]))(16).conjugate()).real()*8.0/3.0
                       -((*(allcoeff_t3m[LO]))(3)*(*(allcoeff_t3m[LO]))(17).conjugate()+(*(allcoeff_t3m[LO]))(2)*(*(allcoeff_t3m[LO]))(18).conjugate()).real()*4.0/3.0) / GammaTAU;
 
    return Brtau3mu;
}

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

• li_3lj.h
• li_3lj.cpp