Elegent::GodizovModel Class Reference

Model of elastic pp scattering by Anton Godizov. More...

#include <GodizovModel.h>

Inheritance diagram for Elegent::GodizovModel:

Public Member Functions
void	Configure (bool _presampled=true)
virtual void	Init ()
	sets up model parameters and data members
virtual void	Print () const
	prints model info
virtual TComplex	Amp (double t) const
	Amplitude in t-space. More...
virtual TComplex	Prf (double b) const
	b in fm
Public Member Functions inherited from Elegent::Model
std::string	CompileFullLabel () const
	compiles a human readable string from fullLabel
std::string	CompileShortLabel () const
	compiles a human readable string from shortLabel

Protected Member Functions
virtual void	ForcePresampling (bool value)
	Sets the presampling option, if available. More...
TComplex	delta_t (double t) const
	Eq. (3) in [2]. More...
TComplex	delta_b (double b) const
	bottom relation from Eq. (1) in [2]
TComplex	prf0 (double b) const
	profile function, b in GeV^-1, see Eq. (1) in [2]
void	Prf0SampleBuild (unsigned int samples)
	samples the prf0 function
TComplex	Prf0SampleEval (double b) const
	interpolates (linearly) the sample at point b

Static Protected Member Functions
static TComplex	delta_t_J0 (double t, double *par, const void *obj)
static TComplex	prf_J0 (double b, double *par, const void *obj)

Protected Attributes
double	De
	al_P(0) - 1
double	ta_a
double	Ga_P0
double	ta_g
double	s0
bool	presampled
	flag whether the profile function is presampled
double	upper_bound_t
	integration variables
double	precision_t
double	upper_bound_b
double	precision_b
bool	integ_workspace_initialized
unsigned long	integ_workspace_size_b
gsl_integration_workspace *	integ_workspace_b
unsigned long	integ_workspace_size_t
gsl_integration_workspace *	integ_workspace_t
double	prf0_sample_db
	the sampling-step size
unsigned int	prf0_sample_N
	the number of sampled points
std::vector< double >	prf0_sample_re
	the sampled real and imaginary values of prf0(b)
std::vector< double >	prf0_sample_im

Additional Inherited Members
Public Attributes inherited from Elegent::Model
Label	fullLabel
	full label (e.g. for figure legend)
Label	shortLabel
	short label (e.g. for object names in ROOT files)

Detailed Description

Model of elastic pp scattering by Anton Godizov.

References: [1] arXiv:1404.2851v2 [2] Phys. Lett. B735 (2014) 57-61

Member Function Documentation

TComplex GodizovModel::Amp ( double  t ) const

virtual

Amplitude in t-space.

Normalisation is such that \( dsigma/dt = (\hbar c)^2 * \pi / (s p^2) * |Amp(t)|^2 \) Differential cross-section can be obtained as Constants::sig_fac * |Amp(t)|^2

Parameters

t	in GeV^-2, t < 0

Implements Elegent::Model.

TComplex GodizovModel::delta_t ( double  t ) const

protected

Eq. (3) in [2].

Eq. (5) in [2]

delta(s, t) according Eq. (3) in [2]

virtual void Elegent::GodizovModel::ForcePresampling ( bool  )

inlineprotectedvirtual

Sets the presampling option, if available.

This option determines whether calling Init would presample relevant distributions (typically b distributions) for faster Amp calls. This behaviour is, in contrary, undesirable for evaluating s distributions.

Reimplemented from Elegent::Model.

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

• src/libElegent/interface/GodizovModel.h
• src/libElegent/src/GodizovModel.cc