Pythia8::Sigma2qqbar2emu Class Reference

Sigma1ql2LFV class. More...

Inheritance diagram for Pythia8::Sigma2qqbar2emu:

Collaboration diagram for Pythia8::Sigma2qqbar2emu:

Public Member Functions
	Sigma2qqbar2emu ()
void	initProc ()
	Initialize process. More...
void	sigmaKin ()
	Evaluate sigmaHat(sHat), part independent of incoming flavour. More...
double	sigmaHat ()
	Evaluate sigmaHat(sHat), part dependent of incoming flavour. More...
void	setIdColAcol ()
std::string	name () const
int	code () const
std::string	inFlux () const
int	id3Mass () const
int	id4Mass () const

Private Attributes
double	m_lambdaCoup
double	m_sigmaTemp
double	m_stop
double	m_lambdaSqddbar
double	m_lambdaSqdsbar
double	m_lambdaSqsdbar
double	m_lambdaSqssbar
int	m_Nc
Rndm *	m_myRand

Detailed Description

Sigma1ql2LFV class.

Cross section for q qbar -> e mu (t:squark).

Definition at line 34 of file Sigma2qqbar2emu.cxx.

Constructor & Destructor Documentation

Sigma2qqbar2emu()

Pythia8::Sigma2qqbar2emu::Sigma2qqbar2emu ( )

inline

Definition at line 38 of file Sigma2qqbar2emu.cxx.

    : m_lambdaCoup(0.), m_sigmaTemp(0.), m_stop(0.),
    m_lambdaSqddbar(0.), m_lambdaSqdsbar(0.), m_lambdaSqsdbar(0.), m_lambdaSqssbar(0.),
    m_Nc(0), m_myRand(0) 
    {}

Member Function Documentation

code()

int Pythia8::Sigma2qqbar2emu::code ( ) const

inline

Definition at line 111 of file Sigma2qqbar2emu.cxx.

{return 10001;}

id3Mass()

int Pythia8::Sigma2qqbar2emu::id3Mass ( ) const

inline

Definition at line 115 of file Sigma2qqbar2emu.cxx.

{return 11;}

id4Mass()

int Pythia8::Sigma2qqbar2emu::id4Mass ( ) const

inline

Definition at line 116 of file Sigma2qqbar2emu.cxx.

{return 13;}

inFlux()

std::string Pythia8::Sigma2qqbar2emu::inFlux ( ) const

inline

Definition at line 112 of file Sigma2qqbar2emu.cxx.

{return "qq";}

initProc()

void Pythia8::Sigma2qqbar2emu::initProc ( )

inline

Initialize process.

Definition at line 46 of file Sigma2qqbar2emu.cxx.

                    {
      
      // Store parameters.
      m_lambdaCoup = 0.2;
      m_Nc = 3;
      m_stop = particleDataPtr->m0(1000006);   //95.5;
      m_lambdaSqddbar = 0.065;
      m_lambdaSqdsbar = 3.8e-5;
      m_lambdaSqsdbar = 3.8e-5;
      m_lambdaSqssbar = 0.065;
      m_myRand = new Rndm(1234567);
      
      return;
    } 

name()

std::string Pythia8::Sigma2qqbar2emu::name ( ) const

inline

Definition at line 109 of file Sigma2qqbar2emu.cxx.

{return "q qbar -> e mu (t:squark)";}

setIdColAcol()

void Pythia8::Sigma2qqbar2emu::setIdColAcol ( )

inline

Definition at line 90 of file Sigma2qqbar2emu.cxx.

                        {
      
      // Flavours.
      double x = m_myRand->flat();
      if(x < 0.5) setId( id1, id2, 11, -13);
      else setId( id1, id2, -11, 13);
      
      // tH defined between f and LQ: must swap tHat <-> uHat if qbar q in.
      swapTU = (id1 < 0); 
      
      //cab I don't understand what's done here.
      // Colour flow topologies.
      if (id1 > 0) setColAcol( 1, 0, 0, 1, 0, 0, 0, 0);
      else         setColAcol( 0, 1, 1, 0, 0, 0, 0, 0);
      
      return;
    }

sigmaHat()

double Pythia8::Sigma2qqbar2emu::sigmaHat ( )

inline

Evaluate sigmaHat(sHat), part dependent of incoming flavour.

Definition at line 75 of file Sigma2qqbar2emu.cxx.

                      {
      
      double lambdaSq = 0.;
      if((id1 == 1 && id2 == -1) || (id1 == -1 && id2 == 1)) lambdaSq = m_lambdaSqddbar;
      else if((id1 == 1 && id2 == -3) || (id1 == -3 && id2 == 1)) lambdaSq = m_lambdaSqdsbar;
      else if((id1 == 3 && id2 == -1) || (id1 == -1 && id2 == 3)) lambdaSq = m_lambdaSqsdbar;
      else if((id1 == 3 && id2 == -3) || (id1 == -3 && id2 == 3)) lambdaSq = m_lambdaSqssbar;
      double sigma = pow2(lambdaSq)*m_sigmaTemp*tH2/(sH2*pow2(tH-pow2(m_stop)));
      return sigma;
    }

sigmaKin()

void Pythia8::Sigma2qqbar2emu::sigmaKin ( )

inline

Evaluate sigmaHat(sHat), part independent of incoming flavour.

Definition at line 64 of file Sigma2qqbar2emu.cxx.

                    {
      
      // The 2 out front is for e- mu+ plus e+ mu -
      m_sigmaTemp = 2./((float)m_Nc * 64. * M_PI);
      
      return;
    }

Member Data Documentation

m_lambdaCoup

double Pythia8::Sigma2qqbar2emu::m_lambdaCoup

private

Definition at line 121 of file Sigma2qqbar2emu.cxx.

m_lambdaSqddbar

double Pythia8::Sigma2qqbar2emu::m_lambdaSqddbar

private

Definition at line 122 of file Sigma2qqbar2emu.cxx.

m_lambdaSqdsbar

double Pythia8::Sigma2qqbar2emu::m_lambdaSqdsbar

private

Definition at line 122 of file Sigma2qqbar2emu.cxx.

m_lambdaSqsdbar

double Pythia8::Sigma2qqbar2emu::m_lambdaSqsdbar

private

Definition at line 122 of file Sigma2qqbar2emu.cxx.

m_lambdaSqssbar

double Pythia8::Sigma2qqbar2emu::m_lambdaSqssbar

private

Definition at line 122 of file Sigma2qqbar2emu.cxx.

m_myRand

Rndm* Pythia8::Sigma2qqbar2emu::m_myRand

private

Definition at line 124 of file Sigma2qqbar2emu.cxx.

m_Nc

int Pythia8::Sigma2qqbar2emu::m_Nc

private

Definition at line 123 of file Sigma2qqbar2emu.cxx.

m_sigmaTemp

double Pythia8::Sigma2qqbar2emu::m_sigmaTemp

private

Definition at line 121 of file Sigma2qqbar2emu.cxx.

m_stop

double Pythia8::Sigma2qqbar2emu::m_stop

private

Definition at line 121 of file Sigma2qqbar2emu.cxx.

---

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

• Sigma2qqbar2emu.cxx