VVIObjF Class Reference

#include <VVIObjF.h>

Public Member Functions
float	fcn (float x) const
void	limits (float &xl, float &xu) const
	density (mode=0) or distribution (mode=1) function More...
	VVIObjF (float kappa=0.01, float beta2=1., int mode=0)
	Constructor. More...

Private Attributes
float	a_ [155]
float	b_ [155]
const int	mode_
	returns the limits on the non-zero (mode=0) or normalized region (mode=1) More...
float	omega_
float	t0_
float	t1_
float	t_
float	x0_

Detailed Description

Port of CERNLIB routines vvidis/vviden (G116) to calculate higher quality Vavilov density and distribution functions

Definition at line 24 of file VVIObjF.h.

Constructor & Destructor Documentation

VVIObjF::VVIObjF	(	float	kappa = 0.01,
		float	beta2 = 1.,
		int	mode = 0
	)

Constructor.

Constructor Set Vavilov parameters kappa and beta2 and define whether to calculate density fcn or distribution fcn

Parameters

kappa	- (input) Vavilov kappa parameter [0.01 (Landau-like) < kappa < 10. (Gaussian-like)]
beta2	- (input) Vavilov beta2 parameter (square of particle speed in v/c units)
mode	- (input) set to 0 to calculate the density function and to 1 to calculate the distribution function

Definition at line 45 of file VVIObjF.cc.

Member Function Documentation

float VVIObjF::fcn

(

float

x

)

const

Vavilov function method Returns density fcn (mode=0) or distribution fcn (mode=1)

Parameters

x	- (input) Argument of function [typically defined as (Q-mpv)/sigma]

Definition at line 133 of file VVIObjF.cc.

void VVIObjF::limits	(	float &	xl,
		float &	xu
	)		const

density (mode=0) or distribution (mode=1) function

Vavilov limits method

Parameters

xl	- (output) Smallest value of the argument for the density and the beginning of the normalized region for the distribution
xu	- (output) Largest value of the argument for the density and the end of the normalized region for the distribution

Definition at line 183 of file VVIObjF.cc.

Member Data Documentation

float VVIObjF::a_[155]

private

Definition at line 43 of file VVIObjF.h.

float VVIObjF::b_[155]

private

Definition at line 44 of file VVIObjF.h.

const int VVIObjF::mode_

private

returns the limits on the non-zero (mode=0) or normalized region (mode=1)

set to 0 to calculate the density function and to 1 to calculate the distribution function

Definition at line 37 of file VVIObjF.h.

float VVIObjF::omega_

private

Definition at line 41 of file VVIObjF.h.

float VVIObjF::t0_

private

Definition at line 38 of file VVIObjF.h.

float VVIObjF::t1_

private

Definition at line 39 of file VVIObjF.h.

float VVIObjF::t_

private

Definition at line 40 of file VVIObjF.h.

float VVIObjF::x0_

private

Definition at line 42 of file VVIObjF.h.