PYTHIA  8.303
Public Member Functions | List of all members
SigmaTotOwn Class Reference

#include <SigmaTotal.h>

Inheritance diagram for SigmaTotOwn:
SigmaTotAux

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=true)
 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 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.
 
double sigAX
 
double sigXX
 
double sigAXB
 
- 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
 
ParticleDataparticleDataPtr
 Pointer to the particle data table.
 
RndmrndmPtr
 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  = true 
)
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.

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: