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

A conversion trial function for initial-final, g -> qqbar. More...

#include <VinciaISR.h>

Inheritance diagram for TrialIFConvA:
TrialGeneratorISR

Public Member Functions

virtual string name () override
 Name of trial generator.
 
virtual double aTrial (double saj, double sjk, double sAK) override
 A conversion trial function for IF (derived base class), g->qqbar. 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. More...
 
- 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 conversion trial function for initial-final, g -> qqbar.

Member Function Documentation

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

A conversion trial function for IF (derived base class), g->qqbar.

Trial antenna function. This trial currently uses the xf overestimate so no extra x-factor (but could be changed to use the f overestimate if many violations, and/or for valence flavours).

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.

double trialPDFratio ( BeamParticle beamAPtr,
BeamParticle beamBPtr,
int  iSys,
int  idA,
int  idK,
double  eA,
double  eK,
double  Qt2A,
double  Qt2B 
)
overridevirtual

Trial PDF ratio.

Number of active flavours.

Old PDF.

Store trial PDF weights for later use to pick flavour.

Skip gluon.

PDF headroom and valence enhancement factor.

Pick trial flavour ID and store weight for that flavour, to be used in accept probability.

Return sum over all flavours, to be used as evolution coefficient.

Reimplemented from TrialGeneratorISR.


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