PYTHIA  8.312
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
BrancherRF Class Referenceabstract

BrancherRF base class for resonance-final antennae. More...

#include <VinciaFSR.h>

Inheritance diagram for BrancherRF:
Brancher BrancherEmitRF BrancherSplitRF

Public Member Functions

 BrancherRF (int iSysIn, Event &event, bool sectorShowerIn, vector< int > allIn)
 Base class constructor = inherited from Brancher.
 
virtual void initRF (Event &event, vector< int > allIn, unsigned int posResIn, unsigned int posFIn, double q2cut, ZetaGeneratorSet *zetaGenSet)=0
 RF branchers have a different initBrancher structure.
 
void resetRF (int iSysIn, Event &event, vector< int > allIn, unsigned int posResIn, unsigned int posFIn, double q2cut, ZetaGeneratorSet *zetaGenSet)
 Reset the brancher.
 
int iNew ()
 Setter methods that are common for all derived RF classes. More...
 
void setMaps (int sizeOld)
 Method to make mothers2daughters and daughters2mothers pairs. More...
 
int posR () const
 Return position of resonance and colour-connected final-state parton.
 
int posF () const
 
double getQ2Max (int evType)
 Return maximum Q2.
 
- Public Member Functions inherited from Brancher
 Brancher (int iSysIn, Event &event, bool sectorShowerIn, vector< int > iIn)
 Main base class constructor.
 
 Brancher (int iSysIn, Event &event, bool sectorShowerIn, int iIn0, int iIn1, int iIn2=0)
 Wrapper for 2- and 3-parton parents.
 
virtual ~Brancher ()
 Base class must have a virtual destructor.
 
void reset (int iSysIn, Event &event, vector< int > iIn)
 Reset (common functionality implemented in base class). More...
 
void reset (int iSysIn, Event &event, int i0In, int i1In, int i2In=0)
 Wrapper for simple 2- (or 3-) parton antennae.
 
int i0 () const
 Methods to get (explicit for up to 3 parents, otherwise just use iVec).
 
int i1 () const
 
int i2 () const
 
int iVec (unsigned int i) const
 
vector< int > iVec ()
 
int id0 () const
 
int id1 () const
 
int id2 () const
 
vector< int > idVec () const
 
int colType0 () const
 
int colType1 () const
 
int colType2 () const
 
vector< int > colTypeVec () const
 
int col0 () const
 
int col1 () const
 
int col2 () const
 
vector< int > colVec () const
 
int acol0 () const
 
int acol1 () const
 
int acol2 () const
 
vector< int > acolVec () const
 
int h0 () const
 
int h1 () const
 
int h2 () const
 
vector< int > hVec () const
 
double m0 () const
 
double m1 () const
 
double m2 () const
 
vector< double > mVec () const
 
vector< double > getmPostVec ()
 
int colTag ()
 
int system () const
 Methods to return saved/derived quantities.
 
double mAnt () const
 
double m2Ant () const
 
double sAnt () const
 
double kallenFac () const
 
double enhanceFac () const
 
double q2Trial () const
 
enum AntFunType antFunTypePhys () const
 
virtual double genQ2 (int evTypeIn, double q2MaxNow, Rndm *rndmPtr, Logger *loggerPtr, const EvolutionWindow *evWindowPtrIn, double colFac, vector< double > headroomIn, vector< double > enhanceFacIn, int verboseIn)=0
 Generate a new Q2 scale.
 
virtual bool genInvariants (vector< double > &invariants, Rndm *, int, Logger *)
 
virtual double pAccept (const double, Logger *, int=0)
 
virtual double getpTscale ()
 Compute pT scale of trial branching.
 
virtual double getXj ()
 Return Xj.
 
virtual int idNew () const
 
virtual double mNew () const
 
virtual bool getNewParticles (Event &event, vector< Vec4 > momIn, vector< int > hIn, vector< Particle > &pNew, Rndm *rndmPtr, VinciaColour *colourPtr)=0
 Return new particles, must be implemented by derived class.
 
virtual void list (string header="none", bool withLegend=true) const
 Simple print utility, showing the contents of the Brancher. More...
 
virtual void setidPost ()
 Set post-branching IDs and masses. Base class is for gluon emission.
 
virtual vector< double > setmPostVec ()
 
virtual void setStatPost ()
 
virtual int getSector ()
 Return sector label.
 
enum BranchType getBranchType ()
 Return branch type.
 
bool isSwapped ()
 Check if swapped.
 
vector< double > getInvariants ()
 Return the saved invariants.
 
void resetEnhanceFac (const double enhanceIn)
 This method allows to reset enhanceFac if we do an accept/reject.
 
bool hasTrial () const
 
void needsNewTrial ()
 Method to mark new trial needed without erasing current one.
 
void eraseTrial ()
 Method to mark new trial needed and erase current one.
 

Protected Member Functions

double getsAK (double mA, double mK, double mAK)
 Protected helper methods for internal class use.
 
double calcQ2Max (double mA, double mAK, double mK)
 
bool vetoPhSpPoint (const vector< double > &invariants, int verboseIn)
 Veto point if outside available phase space. More...
 

Protected Attributes

unsigned int posRes {}
 
unsigned int posFinal {}
 
double mRes {}
 Mass of resonance.
 
double mFinal {}
 Mass of final state parton in antennae.
 
double mRecoilers {}
 
double sAK {}
 
double q2MaxSav {}
 Max Q2 for this brancher, still an overestimate.
 
double colFacSav {}
 
bool colFlowRtoF {}
 
map< unsigned int, unsigned int > posNewtoOld {}
 
- Protected Attributes inherited from Brancher
int systemSav {}
 Data members for storing information about parent partons.
 
vector< int > iSav
 
vector< int > idSav
 
vector< int > colTypeSav
 
vector< int > hSav
 
vector< int > colSav
 
vector< int > acolSav
 
vector< int > idPostSav
 
vector< int > statPostSav
 
vector< double > mSav
 
vector< double > mPostSav
 
int colTagSav {}
 
int evTypeSav {}
 
const EvolutionWindowevWindowSav {}
 All alphaS information.
 
double mAntSav {}
 Saved antenna mass parameters.
 
double m2AntSav {}
 
double kallenFacSav {}
 
double sAntSav {}
 
bool hasTrialSav {false}
 Data members for storing information about generated trial branching.
 
double headroomSav {1.}
 
double enhanceSav {1.}
 
double q2BegSav {}
 
double q2NewSav {}
 
vector< double > invariantsSav
 
bool swapped {false}
 If true, flip identities of A and B.
 
bool sectorShower {}
 Parameters for the sector shower.
 
int iSectorWinner {}
 

Additional Inherited Members

- Public Attributes inherited from Brancher
shared_ptr< TrialGeneratortrialGenPtr = {}
 Object to perform trial generation.
 
map< int, pair< int, int > > mothers2daughters
 Publicly accessible members for storing mother/daughter connections.
 
map< int, pair< int, int > > daughters2mothers
 

Detailed Description

BrancherRF base class for resonance-final antennae.

Member Function Documentation

int iNew ( )
virtual

Setter methods that are common for all derived RF classes.

Return index of new particle (slightly arbitrary choice for splittings).

BrancherRF base class for storing information on antennae between a coloured resonance and final state parton.

Reimplemented from Brancher.

int posF ( ) const
inlinevirtual

Method returns pos of colour-connected daughter to resonance if there is one participating in decay, -1 otherwise.

Reimplemented from Brancher.

void setMaps ( int  sizeOld)
virtual

Method to make mothers2daughters and daughters2mothers pairs.

For updating the children of existing parents. Save children of F (treat like 1->2 splitting).

Save recoilers and insert the new emission at position 1.

Reimplemented from Brancher.

bool vetoPhSpPoint ( const vector< double > &  invariants,
int  verboseIn 
)
protected

Veto point if outside available phase space.

Make copies of masses (just for compactness of notation).

Common sense: saj, sjk > 0. Not an error for splitters - mass effects can make negative and push outside generated phase space.

On-shell X condition.

On-shell j,k conditions.

When |cosTheta| < 1.

This condition may be sufficient to remove above conditions. TODO use gramdet here

Member Data Documentation

bool colFlowRtoF {}
protected

Store whether the colour flow is from R to F (e.g. t -> bW+) or F to R (e.g. tbar -> bbarW-).

double mRecoilers {}
protected

Collective mass of rest of downstream decay products of resonance these will just take recoil.

unsigned int posRes {}
protected

Save reference to position in vectors of resonance and colour connected parton.


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