PYTHIA  8.303
Public Member Functions | List of all members
Dire_fsr_qcd_Q2qQqbarDist Class Reference
Inheritance diagram for Dire_fsr_qcd_Q2qQqbarDist:
DireSplittingQCD DireSplitting

Public Member Functions

 Dire_fsr_qcd_Q2qQqbarDist (string idIn, int softRS, Settings *settings, ParticleData *particleData, Rndm *rndm, BeamParticle *beamA, BeamParticle *beamB, CoupSM *coupSM, Info *info, DireInfo *direInfo)
 
bool canRadiate (const Event &, pair< int, int >, unordered_map< string, bool >=unordered_map< string, bool >(), Settings *=NULL, PartonSystems *=NULL, BeamParticle *=NULL)
 Class inheriting from SplittingQCD class. More...
 
bool canRadiate (const Event &, int iRadBef, int iRecBef, Settings *=NULL, PartonSystems *=NULL, BeamParticle *=NULL)
 
int nEmissions ()
 
bool isPartial ()
 
int kinMap ()
 
int motherID (int idDaughter)
 Return id of mother after splitting.
 
int sisterID (int idDaughter)
 Return id of emission.
 
int radBefID (int idRadAfter, int idEmtAfter)
 Return id of recombined radiator (before splitting!)
 
pair< int, int > radBefCols (int colRadAfter, int acolRadAfter, int colEmtAfter, int acolEmtAfter)
 Return colours of recombined radiator (before splitting!)
 
double gaugeFactor (int=0, int=0)
 Return color factor for splitting.
 
double symmetryFactor (int=0, int=0)
 Return symmetry factor for splitting.
 
double zSplit (double zMinAbs, double zMaxAbs, double m2dip)
 Pick z for new splitting. More...
 
double overestimateInt (double zMinAbs, double zMaxAbs, double pT2Old, double m2dip, int order=-1)
 New overestimates, z-integrated versions. More...
 
double overestimateDiff (double z, double m2dip, int order=-1)
 Return kernel for new splitting. More...
 
bool calc (const Event &state=Event(), int order=-1)
 Functions to calculate the kernel from SplitInfo information. More...
 
- Public Member Functions inherited from DireSplittingQCD
 DireSplittingQCD (string idIn, int softRS, Settings *settings, ParticleData *particleData, Rndm *rndm, BeamParticle *beamA, BeamParticle *beamB, CoupSM *coupSM, Info *info, DireInfo *direInfo)
 Constructor and destructor.
 
void init ()
 
double getNF (double pT2)
 AUXILIARY FUNCTIONS. More...
 
double GammaQCD2 (double NF=5.)
 
double GammaQCD3 (double NF=5.)
 
double betaQCD0 (double NF=5.)
 
double betaQCD1 (double NF=5.)
 
double betaQCD2 (double NF=5.)
 
double as2Pi (double pT2, int orderNow=-1, double renormMultFacNow=-1.)
 
double softRescaleInt (int order)
 
double softRescaleDiff (int order, double pT2, double renormMultFacNow=-1.)
 
double beta0Endpoint (int order, double m2dip, double pT2, double z, double renormMultFacNow=-1.)
 
double polevl (double x, double *coef, int N)
 Helper function to calculate dilogarithm.
 
double DiLog (double x)
 Function to calculate dilogarithm.
 
vector< int > sharedColor (const Event &event, int iRad, int iRec)
 
bool hasSharedColor (const Event &event, int iRad, int iRec)
 
int findCol (int col, vector< int > iExc, const Event &, int type)
 
bool useFastFunctions ()
 
virtual vector< int > radAndEmt (int idDaughter, int)
 
virtual int couplingType (int, int)
 
virtual double coupling (double z, double pT2, double m2dip, double renormMultFacNow=-1., pair< int, bool > radBef=pair< int, bool >(), pair< int, bool > recBef=pair< int, bool >())
 
virtual double couplingScale2 (double z, double pT2, double m2dip, pair< int, bool > radBef, pair< int, bool > recBef)
 
virtual double getJacobian (const Event &=Event(), PartonSystems *partonSystems=0)
 
virtual unordered_map< string, double > getPhasespaceVars (const Event &=Event(), PartonSystems *=0)
 
double sCoef (int powz)
 
double sExp (int powz)
 
double kCoef (int powz)
 
double kExp (int powz)
 
double cCoef (int powz)
 
double cExp (int powz)
 
double fCoef ()
 
bool hasMECBef (const Event &state, double pT2)
 
bool hasMECAft (const Event &state, double pT2)
 
- Public Member Functions inherited from DireSplitting
 DireSplitting ()
 Constructor and destructor.
 
 DireSplitting (string idIn, int softRS, Settings *settings, ParticleData *particleData, Rndm *rndm, BeamParticle *beamA, BeamParticle *beamB, CoupSM *coupSMPtrIn, Info *infoPtrIn, DireInfo *direInfo)
 
void init ()
 The Splitting class.
 
bool is (ulong pattern)
 
string name ()
 
virtual bool aboveCutoff (double, const Particle &, const Particle &, int, PartonSystems *=NULL)
 Discard below the cut-off for the splitting.
 
virtual vector< pair< int, int > > radAndEmtCols (int, int, Event)
 
virtual bool canUseForBranching ()
 
virtual bool swapRadEmt ()
 
virtual bool isSymmetric (const Particle *=NULL, const Particle *=NULL)
 
virtual vector< int > recPositions (const Event &, int, int)
 
virtual double getKernel (string="")
 Functions to store and retrieve all the variants of the kernel.
 
virtual unordered_map< string, double > getKernelVals ()
 
virtual void clearKernels ()
 
void setTimesPtr (shared_ptr< DireTimes > fsrIn)
 
void setTimesDecPtr (shared_ptr< DireTimes > fsrIn)
 
void setSpacePtr (shared_ptr< DireSpace > isrIn)
 
virtual bool allow_z_endpoint_for_kinematics ()
 Treatment of additional virtual corrections.
 
virtual bool allow_pT2_endpoint_for_kinematics ()
 
virtual bool allow_sai_endpoint_for_kinematics ()
 
virtual bool allow_xa_endpoint_for_kinematics ()
 
virtual void try_z_endpoint ()
 Functions to set if kernel should contribute to a kinematical endpoint.
 
virtual void try_pT2_endpoint ()
 
virtual void try_sai_endpoint ()
 
virtual void try_xa_endpoint ()
 
virtual bool is_z_endpoint ()
 Return endpoint information.
 
virtual bool is_pT2_endpoint ()
 
virtual bool is_sai_endpoint ()
 
virtual bool is_xa_endpoint ()
 
virtual double tdire_ff (double, double t, double)
 Functions to calculate Dire variables from the evolution variables.
 
virtual double zdire_ff (double z, double, double)
 
virtual double tdire_fi (double, double t, double)
 
virtual double zdire_fi (double z, double, double)
 
virtual double tdire_if (double, double t, double)
 
virtual double zdire_if (double z, double, double)
 
virtual double tdire_ii (double, double t, double)
 
virtual double zdire_ii (double z, double, double)
 
virtual void storeOverhead (double pT2, double x, int radid, int nf, double val)
 
virtual double overhead (double pT2, int idd, int nf)
 

Additional Inherited Members

- Public Attributes inherited from DireSplittingQCD
double CA
 VARIABLES.
 
double TR
 
double CF
 
double pTmin
 
double pT2minVariations
 
int NF_qcd_fsr
 
int orderSave
 
bool usePDFalphas
 
bool doVariations
 
bool doCorrelations
 
bool doMECs
 
double alphaSorder
 
double alphaS2pi
 
AlphaStrong alphaS
 
int asSchemeISR
 
int asSchemeFSR
 
bool useBackboneGluons
 
bool doGeneralizedKernel
 
- Public Attributes inherited from DireSplitting
double renormMultFac
 
string id
 
int correctionOrder
 
SettingssettingsPtr
 
ParticleDataparticleDataPtr
 
RndmrndmPtr
 
BeamParticlebeamAPtr
 
BeamParticlebeamBPtr
 
CoupSMcoupSMPtr
 
InfoinfoPtr
 
DireInfodireInfoPtr
 
bool is_qcd
 Some short-cuts and string hashes to help avoid string comparisons.
 
bool is_qed
 
bool is_ewk
 
bool is_fsr
 
bool is_isr
 
bool is_dire
 
ulong nameHash
 
unordered_map< string, double > kernelVals
 
DireSplitInfo splitInfo
 
shared_ptr< DireSpaceisr
 
shared_ptr< DireTimesfsr
 
shared_ptr< DireTimesfsrDec
 
multimap< double, OverheadInfooverhead_map
 
- Static Public Attributes inherited from DireSplittingQCD
static const double SMALL_TEVOL = 2.0
 The SplittingQCD class.
 

Member Function Documentation

bool calc ( const Event state = Event(),
int  order = -1 
)
virtual

Functions to calculate the kernel from SplitInfo information.

Return kernel for new splitting.

Dummy statement to avoid compiler warnings.

Read all splitting variables.

Calculate argument of alphaS.

Do nothing without other NLO kernels!

Choose if simulating endpoint or differential 1->3 (latter containing both sai=0 and sai !=0). For choice of endpoint, set sai=0 later.

Get invariants.

Use only massless for now!

there are 2nf-2 such kernels.

From xa integration volume.

Multiply by 2 since we randomly chose endpoint or fully differential.

Weight of sai-selection. Note: Use non-zero sai here!

there are 2nf-2 such kernels.

From xa integration volume.

Multiply by 2 since we randomly chose endpoint or fully differential.

Weight of sai-selection.

Remember that this might be an endpoint with vanishing sai.

Insert value of kernel into kernel list.

Create muR-variations.

Multiply with z to project out part where emitted antiquark is soft, and quark is identified.

Store higher order correction separately.

Store kernel values.

Reimplemented from DireSplitting.

bool canRadiate ( const Event state,
pair< int, int >  ints,
unordered_map< string, bool >  = unordered_map<string,bool>(),
Settings = NULL,
PartonSystems = NULL,
BeamParticle = NULL 
)
virtual

Class inheriting from SplittingQCD class.

SplittingQCD function Q-> q Q qbar (FSR) Return true if this kernel should partake in the evolution.

Reimplemented from DireSplitting.

int kinMap ( )
virtual

Function to return an identifier for the phase space mapping that is used for setting up this splitting. return values: 1 –> Default Dire mapping. 2 –> Dire 1->3 mapping.

Reimplemented from DireSplitting.

double overestimateDiff ( double  z,
double  m2dip,
int  order = -1 
)
virtual

Return kernel for new splitting.

Return overestimate for new splitting.

Do nothing without other NLO kernels!

Overestimate chosen to have accept weights below one for kappa~0.1

This splitting is down by one power of alphaS !

Reimplemented from DireSplitting.

double overestimateInt ( double  zMinAbs,
double  zMaxAbs,
double  pT2Old,
double  m2dip,
int  order = -1 
)
virtual

New overestimates, z-integrated versions.

Do nothing without other NLO kernels!

Overestimate chosen to have accept weights below one for kappa~0.1 z est from 1/(z + kappa^4)

This splitting is down by one power of alphaS !

Reimplemented from DireSplitting.

double zSplit ( double  zMinAbs,
double  zMaxAbs,
double  m2dip 
)
virtual

Pick z for new splitting.

z est from 1/(z + kappa^4)

Reimplemented from DireSplitting.


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