tau_3e Class Reference

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

#include <li_3lj.h>

Inheritance diagram for tau_3e:
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Collaboration diagram for tau_3e:
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Detailed Description

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

Author
HEPfit Collaboration

The tau_3e class calculates the branching ratio of the process \( \tau \to eee \) in the model.

Definition at line 104 of file li_3lj.h.

Public Member Functions

double computeThValue ()
 
 tau_3e (const StandardModel &SM_i)
 Calculates the value of the process \( \tau \to eee \). 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

const StandardModelmySM
 Constructor containing the Wilson coefficient. 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

tau_3e::tau_3e ( const StandardModel SM_i)

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

Returns
value of the process \( \tau \to eee \)

Definition at line 174 of file li_3lj.cpp.

175 : ThObservable(SM_i), mySM(SM_i)
176 {}
const StandardModel & mySM
Constructor containing the Wilson coefficient.
Definition: li_3lj.h:122
ThObservable(const StandardModel &SM_i)
Constructor.
Definition: ThObservable.h:29

Member Function Documentation

double tau_3e::computeThValue ( )
virtual
Returns
value of the process \( \tau \to eee \)

Implements ThObservable.

Definition at line 187 of file li_3lj.cpp.

188 {
189  double alph = mySM.getAle();
191  double mTAU = mySM.getLeptons(StandardModel::TAU).getMass();
192  double GammaTAU = 2.26735e-12;
193 
195 
196  double Brtau3e = alph*alph/(32.0*M_PI) * pow(mTAU,5.0)
197  * ((*(allcoeff_t3e[LO]))(1).abs2()+(*(allcoeff_t3e[LO]))(0).abs2()
198  -4.0*((*(allcoeff_t3e[LO]))(1)*(*(allcoeff_t3e[LO]))(2).conjugate()+(*(allcoeff_t3e[LO]))(3)*(*(allcoeff_t3e[LO]))(0).conjugate()).real()
199  +((*(allcoeff_t3e[LO]))(3).abs2()+(*(allcoeff_t3e[LO]))(2).abs2())*(16.0*log(mTAU/mE)-22.0)/3.0
200  +((*(allcoeff_t3e[LO]))(5).abs2()+(*(allcoeff_t3e[LO]))(4).abs2())/6.0
201  +(((*(allcoeff_t3e[LO]))(7)+(*(allcoeff_t3e[LO]))(13)).abs2()+((*(allcoeff_t3e[LO]))(6)+(*(allcoeff_t3e[LO]))(12)).abs2())/3.0
202  +(((*(allcoeff_t3e[LO]))(9)+(*(allcoeff_t3e[LO]))(15)).abs2()+((*(allcoeff_t3e[LO]))(8)+(*(allcoeff_t3e[LO]))(14)).abs2())/24.0
203  +((*(allcoeff_t3e[LO]))(11).abs2()+(*(allcoeff_t3e[LO]))(10).abs2())*6.0
204  -(((*(allcoeff_t3e[LO]))(9)+(*(allcoeff_t3e[LO]))(15))*(*(allcoeff_t3e[LO]))(11).conjugate()+((*(allcoeff_t3e[LO]))(8)+(*(allcoeff_t3e[LO]))(14))*(*(allcoeff_t3e[LO]))(10).conjugate()).real()
205  +((*(allcoeff_t3e[LO]))(1)*(*(allcoeff_t3e[LO]))(5).conjugate()+(*(allcoeff_t3e[LO]))(0)*(*(allcoeff_t3e[LO]))(4).conjugate()
206  +(*(allcoeff_t3e[LO]))(1)*((*(allcoeff_t3e[LO]))(7)+(*(allcoeff_t3e[LO]))(13)).conjugate()+(*(allcoeff_t3e[LO]))(0)*((*(allcoeff_t3e[LO]))(6)+(*(allcoeff_t3e[LO]))(12)).conjugate()).real()*2.0/3.0
207  -4.0*((*(allcoeff_t3e[LO]))(2)*(*(allcoeff_t3e[LO]))(5).conjugate()+(*(allcoeff_t3e[LO]))(3)*(*(allcoeff_t3e[LO]))(4).conjugate()
208  +(*(allcoeff_t3e[LO]))(3)*((*(allcoeff_t3e[LO]))(6)+(*(allcoeff_t3e[LO]))(12)).conjugate()+(*(allcoeff_t3e[LO]))(2)*((*(allcoeff_t3e[LO]))(7)+(*(allcoeff_t3e[LO]))(13)).conjugate()).real()/3.0
209  +2.0*((*(allcoeff_t3e[LO]))(19).abs2()+(*(allcoeff_t3e[LO]))(16).abs2())/3.0
210  +((*(allcoeff_t3e[LO]))(18).abs2()+(*(allcoeff_t3e[LO]))(17).abs2())/3.0
211  +((*(allcoeff_t3e[LO]))(5)*(*(allcoeff_t3e[LO]))(19).conjugate()+(*(allcoeff_t3e[LO]))(4)*(*(allcoeff_t3e[LO]))(16).conjugate()
212  +((*(allcoeff_t3e[LO]))(7)+(*(allcoeff_t3e[LO]))(13))*(*(allcoeff_t3e[LO]))(18).conjugate()+((*(allcoeff_t3e[LO]))(6)+(*(allcoeff_t3e[LO]))(12))*(*(allcoeff_t3e[LO]))(17).conjugate()).real()*2.0/3.0
213  +((*(allcoeff_t3e[LO]))(1)*(*(allcoeff_t3e[LO]))(19).conjugate()+(*(allcoeff_t3e[LO]))(0)*(*(allcoeff_t3e[LO]))(16).conjugate()).real()*4.0/3.0
214  +((*(allcoeff_t3e[LO]))(1)*(*(allcoeff_t3e[LO]))(18).conjugate()+(*(allcoeff_t3e[LO]))(0)*(*(allcoeff_t3e[LO]))(17).conjugate()).real()*2.0/3.0
215  -((*(allcoeff_t3e[LO]))(2)*(*(allcoeff_t3e[LO]))(19).conjugate()+(*(allcoeff_t3e[LO]))(3)*(*(allcoeff_t3e[LO]))(16).conjugate()).real()*8.0/3.0
216  -((*(allcoeff_t3e[LO]))(3)*(*(allcoeff_t3e[LO]))(17).conjugate()+(*(allcoeff_t3e[LO]))(2)*(*(allcoeff_t3e[LO]))(18).conjugate()).real()*4.0/3.0) / GammaTAU;
217 
218  return Brtau3e;
219 }
Particle getLeptons(const StandardModel::lepton p) const
A get method to retrieve the member object of a lepton.
complex pow(const complex &z1, const complex &z2)
gslpp::vector< gslpp::complex > ** ComputeCoeffli_3lj(int li_lj)
Computes the Wilson coefficient for the process .
Definition: LeptonFlavour.h:77
LeptonFlavour * getMyLeptonFlavour() const
Definition: OrderScheme.h:33
const StandardModel & mySM
Constructor containing the Wilson coefficient.
Definition: li_3lj.h:122
double getAle() const
A get method to retrieve the fine-structure constant .
const double & getMass() const
A get method to access the particle mass.
Definition: Particle.h:61
complex log(const complex &z)

Member Data Documentation

const StandardModel& tau_3e::mySM
private

Constructor containing the Wilson coefficient.

Definition at line 122 of file li_3lj.h.


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