#include <SigmaTotal.h>

Inheritance diagram for SigmaTotOwn:

Public Member Functions
	SigmaTotOwn ()
	Constructor.

virtual void	init (Info *infoPtrIn)
	Store pointers and initialize data members. More...

virtual bool	calcTotEl (int idAin, int idBin, double, double, double)
	Calculate integrated total/elastic cross sections. More...

virtual double	dsigmaEl (double t, bool useCoulomb=false, bool=false)
	Differential elastic cross section. More...

virtual bool	calcDiff (int, int, double sIn, double, double)
	Calculate integrated diffractive cross sections.

virtual double	dsigmaSD (double xi, double t, bool=true, int=0)
	Differential single diffractive cross section. More...

virtual double	dsigmaDD (double xi1, double xi2, double t, int=0)
	Differential double diffractive cross section. More...

virtual double	dsigmaCD (double xi1, double xi2, double t1, double t2, int=0)
	Differential central diffractive cross section. More...

virtual double	mMinCD ()
	Minimal central diffractive mass.

Public Member Functions inherited from SigmaTotAux
	SigmaTotAux ()
	Constructor.

virtual	~SigmaTotAux ()
	Destructor.

virtual bool	calcTot (int, int, double)
	Calculate total cros section only. Only implemented for SigmaSaSDL.

virtual bool	splitDiff ()
	Possibility to separate xi and t choices for diffraction.

pair< double, double >	tRange (double sIn, double s1In, double s2In, double s3In, double s4In)

bool	tInRange (double tIn, double sIn, double s1In, double s2In, double s3In, double s4In)

double	pFormFac (double tIn)
	Commonly used proton form factor.

Additional Inherited Members
Public Attributes inherited from SigmaTotAux
bool	isExpEl
	Store total and elastic cross section properties.

bool	hasCou

double	sigTot

double	rhoOwn

double	sigEl

double	bEl

double	sigTotCou

double	sigElCou

double	sigXB
	Store diffractive cross sections. Possibly also sigmaND.

double	sigAX

double	sigXX

double	sigAXB

double	sigNDtmp

Protected Member Functions inherited from SigmaTotAux
virtual bool	initCoulomb (Settings &settings, ParticleData *particleDataPtrIn)
	Initialize Coulomb correction parameters. More...

virtual bool	addCoulomb ()
	Add Coulomb corrections to the elastic and total cross sections. More...

virtual double	dsigmaElCoulomb (double t)
	Coulomb contribution to the differential elastic cross sections. More...

Protected Attributes inherited from SigmaTotAux
int	idA
	Initialization data, normally only set once.

int	idB

bool	tryCoulomb
	Add Coulomb corrections to the elastic cross section.

double	chgSgn

double	tAbsMin

double	lambda

double	phaseCst

ParticleData *	particleDataPtr
	Pointer to the particle data table.

Rndm *	rndmPtr
	Pointer to the random number generator.

Static Protected Attributes inherited from SigmaTotAux
static const int	NPOINTS = 1000
	Constants: could only be changed in the code itself. More...

static const double	ALPHAEM = 0.00729353
	alpha_em(0). More...

static const double	CONVERTEL = 0.0510925
	Conversion coefficients = 1/(16pi) * (mb <-> GeV^2).

static const double	MPROTON = 0.9382720
	Proton and pion masses, and their squares. Euler's constant.

static const double	SPROTON = 0.8803544

static const double	MPION = 0.1349766

static const double	SPION = 0.0182187

static const double	GAMMAEUL = 0.577215665

static const double	TABSREF = 2e-3
	Reference scale for nominal definition of t slope.

static const double	TABSMAX = 1.

static const double	MINSLOPEEL = 10.

Detailed Description

The SigmaTotOwn class parametrizes total, elastic and diffractive cross sections by user settings.

Member Function Documentation

bool calcTotEl	(	int	idAin,
		int	idBin,
		double	,
		double	,
		double
	)

virtual

Calculate integrated total/elastic cross sections.

With total and elastic cross section already set, only add Coulomb.

Save some input.

Possibly allow Coulomb correction + interference.

Done.

Reimplemented from SigmaTotAux.

double dsigmaCD	(	double	xi1,
		double	xi2,
		double	t1,
		double	t2,
		int	= `0`
	)

virtual

Differential central diffractive cross section.

Differential central diffractive cross section. Naive non-authorized generalization of the simple Pomeron fluxes above.

Common setup.

Schuler-Sj�strand.

Bruni-Ingelman.

Streng-Berger.

Donnachie-Landshoff.

MBR.

H1 Fit A, B.

Optionally dampen with 1 / (1 + exp( -p * (y - y_gap))) for both gaps.

Done.

Reimplemented from SigmaTotAux.

double dsigmaDD	(	double	xi1,
		double	xi2,
		double	t,
		int	= `0`
	)

virtual

Differential double diffractive cross section.

Differential double diffractive cross sections. Naive non-authorized generalization of the simple Pomeron fluxes above.

Common setup.

Schuler-Sj�strand.

Bruni-Ingelman.

Streng-Berger.

Donnachie-Landshoff.

MBR.

H1 Fit A, B.

Optionally dampen with 1 / (1 + exp( -p * (y - y_gap))).

Done.

Reimplemented from SigmaTotAux.

double dsigmaEl	(	double	t,
		bool	useCoulomb = `false`,
		bool	= `false`
	)

virtual

Differential elastic cross section.

Hadronic contribution: simple exponential.

Possibly add Coulomb contribution and interference.

Done.

Reimplemented from SigmaTotAux.

double dsigmaSD	(	double	xi,
		double	t,
		bool	= `true`,
		int	= `0`
	)

virtual

Differential single diffractive cross section.

Differential single diffractive cross sections as provided by the x-weighted Pomeron flux, see HardDiffraction::xfPom for details.

Common setup.

Schuler-Sj�strand.

Bruni-Ingelman.

Streng-Berger.

Donnachie-Landshoff.

MBR.

H1 Fit A, B.

Optionally dampen with 1 / (1 + exp( -p * (y - y_gap))).

Done.

Reimplemented from SigmaTotAux.

void init ( Info * infoPtrIn )

virtual

Store pointers and initialize data members.

Initialize data members.

The SigmaTotOwn class. Parametrizes total, elastic and diffractive cross sections by user settings.

Use shorthand for settings

Main user-set values for total and elastic cross sections.

Initialize parameters for Coulomb corrections to elastic scattering.

User-set values for diffractive cross sections.

Set diffraction parameters.

Set up Pomeron flux constants, see HardDiffraction::init.

Schuler-Sj�strand.

Bruni-Ingelman.

Streng-Berger.

Donnachie-Landshoff.

MBR.

H1 Fit A, B.

H1 functional form but with user-supplied values for the parameters.

b_min for double diffraction, suppression of small gaps, minimal CD mass.

Implements SigmaTotAux.

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

include/Pythia8/SigmaTotal.h
src/SigmaTotal.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation