Kfactors.cpp File Reference

#include <BSMPT/Kfactors/Kfactors.h>
#include <BSMPT/utility/Logger.h>
#include <cmath>
#include <iostream>
#include <sstream>
#include <gsl/gsl_integration.h>

Namespaces
namespace	BSMPT
	This classes calculates the Bounce action of the potential with a set temperature.

Functions
double	BSMPT::Kfactors::distribution_f0 (double E0, int s, double Temp, int diff=0)
double	BSMPT::Kfactors::K_integrand (const std::vector< double > &p, double masssquared, int switchvalue, int s, double Temp)
double	BSMPT::Kfactors::K_integrand_gsl (double *x, std::size_t dim, void *params)
double	BSMPT::Kfactors::K_integration (double masssquared, double Temp, int switchvalue, int s)
double	BSMPT::Kfactors::K_functions (double masssquared, double Temp, int switchvalue, int s)
void	BSMPT::Kfactors::display_results (std::string title, double result, double error)
double	BSMPT::Kfactors::Ktilde_normalization_func (double x, void *params)
double	BSMPT::Kfactors::Ktilde_normalization (double Temp, int s, double masssquared)

Function Documentation

display_results()

void BSMPT::Kfactors::display_results	(	std::string	title,
		double	result,
		double	error
	)

Helper function which displays the numbers in a more readable way

distribution_f0()

double BSMPT::Kfactors::distribution_f0	(	double	E0,
		int	s,
		double	Temp,
		int	diff = 0
	)

Calculates the distribution f0, defined in Eq(13) in 0604159

Parameters

E0	Energy at which the distribution is calculated
s	s=1 for fermions and s=-1 for bosons
Temp	Temperature at which the distribution should be evaluated
diff	number of derivatives w.r.t. E0, diff = 0 no derivative and diff = 1 or 2 accordingly

K_functions()

double BSMPT::Kfactors::K_functions	(	double	masssquared,
		double	Temp,
		int	switchvalue,
		int	s
	)

Calculates the normalized K function

Parameters

masssquared	the m^2 value at which K should be evaluated
Temp	the temperature at which K should be evaluated
switchvalue	The index which K to choose
s	s=-1 yields the function for a bosonic distribution, s=+1 for a fermionic one

K_integrand()

double BSMPT::Kfactors::K_integrand	(	const std::vector< double > &	p,
		double	masssquared,
		int	switchvalue,
		int	s,
		double	Temp
	)

Evaluates the integrand in the K functions

Parameters

p	momentum at which to evaluate the K function
masssquared	the m^2 value at which K should be evaluated
Temp	the temperature at which K should be evaluated
switchvalue	The index which K to choose
s	s=-1 yields the function for a bosonic distribution, s=+1 for a fermionic one

K_integrand_gsl()

double BSMPT::Kfactors::K_integrand_gsl	(	double *	x,
		std::size_t	dim,
		void *	params
	)

Interface to communicate the value of K_integrand() to the GSL integration routine

K_integration()

double BSMPT::Kfactors::K_integration	(	double	masssquared,
		double	Temp,
		int	switchvalue,
		int	s
	)

Calculates the values of the K functions given in Eq (23) in 0604159 without the normalization

Parameters

masssquared	the m^2 value at which K should be evaluated
Temp	the temperature at which K should be evaluated
switchvalue	The index which K to choose
s	s=-1 yields the function for a bosonic distribution, s=+1 for a fermionic one

Ktilde_normalization()

double BSMPT::Kfactors::Ktilde_normalization	(	double	Temp,
		int	s,
		double	masssquared
	)

Calculates the normalization for the non tilde K functions

Parameters

Temp	Temperature
s	+1 for fermions and -1 for bosons
masssquared	m^2 value

Ktilde_normalization_func()

double BSMPT::Kfactors::Ktilde_normalization_func	(	double	x,
		void *	params
	)

Integrand to calculate the normalization for the Ktilde functions. Used in Ktilde_normalization()

Parameters

x	vector which containts the momentum
params	GSL_integration struct