PYTHIA  8.303
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TrialIFGCollA Class Reference

A gluon collinear trial function for initial-final. More...

#include <VinciaISR.h>

Inheritance diagram for TrialIFGCollA:
TrialGeneratorISR

Public Member Functions

virtual string name () override
 Name of trial generator.
 
virtual double aTrial (double saj, double sjk, double sAK) override
 A gluon collinear trial function for initial-final. More...
 
virtual double getQ2 (double saj, double sjk, double sAK) override
 Evolution scale.
 
virtual double getQ2max (double sAK, double eA, double eBeamUsed) override
 
virtual double genQ2run (double q2old, double sAK, double zMin, double zMax, double colFac, double PDFratio, double b0, double kR, double Lambda, double eA, double eK, double headroomFac=1.0, double enhanceFac=1.0) override
 Generate a new Q value, with first-order running alphaS. More...
 
virtual double genQ2 (double q2old, double sAK, double zMin, double zMax, double colFac, double alphaSvalue, double PDFratio, double eA, double eK, double headroomFac=1.0, double enhanceFac=1.0) override
 Generate a new Q value, with constant trial alphaS. More...
 
virtual double genZ (double zMin, double zMax) override
 Generate a new zeta value in [zMin,zMax].
 
virtual double getIz (double zMin, double zMax) override
 The zeta integral.
 
virtual double getZmin (double Qt2, double sAK, double eA, double eBeamUsed) override
 The zeta boundaries, for a given value of the evolution scale.
 
virtual double getZmax (double Qt2, double sAK, double eA, double eBeamUsed) override
 
virtual double getS1j (double Qt2, double zeta, double sAK) override
 Inverse transforms to obtain saj and sjk from Qt2 and zeta. More...
 
virtual double getSj2 (double Qt2, double zeta, double sAK) override
 
virtual double trialPDFratio (BeamParticle *beamAPtr, BeamParticle *beamBPtr, int iSys, int idA, int idK, double eA, double eK, double Qt2A, double Qt2B) override
 Trial PDF ratio (= just a simple headroom factor).
 
- Public Member Functions inherited from TrialGeneratorISR
 TrialGeneratorISR ()
 Constructor.
 
void initPtr (Info *infoPtrIn)
 Initialize pointers. More...
 
virtual void init (double mcIn, double mbIn)
 Initialize. More...
 
virtual double genQ2thres (double q2old, double sAB, double zMin, double zMax, double colFac, double alphaSvalue, double PDFratio, int idA, int idB, double eA, double eB, bool useMpdf, double headroomFac=1.0, double enhanceFac=1.0)
 
virtual double getTrialPDFratio ()
 Return last trial PDF ratio.
 
bool checkInit ()
 Check initialization.
 
int trialFlav ()
 Return the last trial flavor.
 

Additional Inherited Members

- Protected Attributes inherited from TrialGeneratorISR
InfoinfoPtr
 Pointers.
 
RndmrndmPtr
 
SettingssettingsPtr
 
bool useMevolSav
 Use m or pT evolution for collinear singularities.
 
double shhSav
 s for hadron hadron.
 
int trialFlavSav
 For conversion trial generators.
 
int nGtoQISRSav
 
double mbSav
 Masses.
 
double mcSav
 
double trialPDFratioSav
 Saved trial PDF ratio and trial tolerance.
 
double TINYPDFtrial
 

Detailed Description

A gluon collinear trial function for initial-final.

Member Function Documentation

double aTrial ( double  saj,
double  sjk,
double  sAK 
)
overridevirtual

A gluon collinear trial function for initial-final.

Trial antenna function. This trial generator uses x*PDF ratio <= const as overestimate so the trial function has no extra x-factor.

Trial antenna function.

Reimplemented from TrialGeneratorISR.

double genQ2 ( double  q2old,
double  sAK,
double  zMin,
double  zMax,
double  colFac,
double  alphaSvalue,
double  PDFratio,
double  eA,
double  eK,
double  headroomFac = 1.0,
double  enhanceFac = 1.0 
)
overridevirtual

Generate a new Q value, with constant trial alphaS.

Sanity checks.

Enhance factors < 1: do not modify trial probability.

Generate new trial scale.

Reimplemented from TrialGeneratorISR.

double genQ2run ( double  q2old,
double  sAK,
double  zMin,
double  zMax,
double  colFac,
double  PDFratio,
double  b0,
double  kR,
double  Lambda,
double  eA,
double  eK,
double  headroomFac = 1.0,
double  enhanceFac = 1.0 
)
overridevirtual

Generate a new Q value, with first-order running alphaS.

Sanity checks.

Enhance factors < 1: do not modify trial probability.

Generate new trial scale.

Reimplemented from TrialGeneratorISR.

double getS1j ( double  Qt2,
double  zeta,
double  sAK 
)
overridevirtual

Inverse transforms to obtain saj and sjk from Qt2 and zeta.

If zeta < 0, swap invariants.

Sanity check.

Reimplemented from TrialGeneratorISR.

double getSj2 ( double  Qt2,
double  zeta,
double  sAK 
)
overridevirtual

If zeta < 0, swap invariants.

Sanity check.

Reimplemented from TrialGeneratorISR.


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