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Herwig  7.2.1
ThePEG::FxFxReader Class Referenceabstract

FxFxReader is an abstract base class to be used for objects which reads event files or streams from matrix element generators. More...

#include <FxFxReader.h>

Inheritance diagram for ThePEG::FxFxReader:

Public Member Functions

Standard constructors and destructors.
 FxFxReader (bool active=false)
 Default constructor. More...
 
 FxFxReader (const FxFxReader &)
 Copy-constructor.
 
virtual ~FxFxReader ()
 Destructor.
 
Other important function which may be overridden in

The ID (e.g.

100x, 2001) for the weight sub-classes which wants to bypass the basic HEPRUP or HEPEUP variables or otherwise facilitate the conversion to ThePEG objects.

virtual void initialize (FxFxEventHandler &eh)
 Initialize. More...
 
virtual double getEvent ()
 Calls readEvent() or uncacheEvent() to read information into the FxFx common block variables. More...
 
virtual bool readEvent ()
 Calls doReadEvent() and performs pre-defined reweightings. More...
 
virtual void skip (long n)
 Skip n events. More...
 
tXCombPtr getXComb ()
 Get an XComb object. More...
 
tSubProPtr getSubProcess ()
 Get a SubProcess object corresponding to the information in the Les Houches common block variables.
 
virtual long scan ()
 Scan the file or stream to obtain information about cross section weights and particles etc. More...
 
virtual void initStat ()
 Take the information corresponding to the HEPRUP common block and initialize the statistics for this reader.
 
double reweight ()
 Reweights the current event using the reweights and preweights vectors. More...
 
virtual void fillEvent ()
 Converts the information in the Les Houches common block variables into a Particle objects.
 
void reset ()
 Removes the particles created in the last generated event, preparing to produce a new one.
 
virtual void setWeightScale (long neve)
 Possibility for subclasses to recover from non-conformant settings of XMAXUP when an event file has been scanned with neve events. More...
 
Other inlined access functions.
long NEvents () const
 The number of events found in this reader. More...
 
long currentPosition () const
 The number of events produced so far. More...
 
long maxScan () const
 The maximum number of events to scan to collect information about processes and cross sections. More...
 
bool active () const
 Return true if this reader is active.
 
bool negativeWeights () const
 True if negative weights may be produced.
 
const XSecStatxSecStats () const
 The collected cross section statistics for this reader.
 
const StatMapprocessStats () const
 Collected statistics about the individual processes.
 
void select (double weight)
 Select the current event. More...
 
void accept ()
 Accept the current event assuming it was previously selcted.
 
void reject (double w)
 Reject the current event assuming it was previously accepted.
 
virtual void increaseMaxXSec (CrossSection maxxsec)
 Increase the overestimated cross section for this reader.
 
tPExtrPtr partonExtractor () const
 The PartonExtractor object used to construct remnants.
 
tCascHdlPtr CKKWHandler () const
 Return a possibly null pointer to a CascadeHandler to be used for CKKW-reweighting.
 
const PartonPairVec & partonBins () const
 The pairs of PartonBin objects describing the partons which can be extracted by the PartonExtractor object.
 
const XCombMapxCombs () const
 The map of XComb objects indexed by the corresponding PartonBin pair.
 
const Cutscuts () const
 The Cuts object to be used for this reader.
 
Functions used by the persistent I/O system.
void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently. More...
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently. More...
 
- Public Member Functions inherited from HandlerBaseT< UseRandom >
double rnd () const
 
double rnd (double xu) const
 
double rnd (double xl, double xu) const
 
bool rndbool () const
 
bool rndbool (double p) const
 
bool rndbool (double p1, double p2) const
 
int rndsign (double p1, double p2, double p3) const
 
int rnd2 (double p0, double p1) const
 
int rnd3 (double p0, double p1, double p2) const
 
int rnd4 (double p0, double p1, double p2, double p3) const
 
long irnd (long xu=2) const
 
long irnd (long xl, long xu) const
 
const StandardModelBase & SM () const
 
tSMPtr standardModel () const
 
- Public Member Functions inherited from ThePEG::Interfaced
virtual bool defaultInit ()
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::InterfacedBase
string fullName () const
 
string name () const
 
string path () const
 
string comment () const
 
void setup (istream &is)
 
virtual IBPtr fullclone () const
 
virtual void debugme () const
 
void update ()
 
void init ()
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
void update ()
 
void init ()
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::Base
void debug () const
 
- Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType referenceCount () const
 
- Public Member Functions inherited from ThePEG::Named
 Named (const string &newName=string())
 
 Named (const Named &)=default
 
const string & name () const
 
bool operator== (const Named &other) const
 
bool operator< (const Named &other) const
 
- Public Member Functions inherited from ThePEG::LastXCombInfo< XC >
const XC & lastXComb () const
 
tXCPtr lastXCombPtr () const
 
const XC & lastHeadXComb () const
 
tXCPtr lastHeadXCombPtr () const
 
const EventHandlerlastEventHandler () const
 
tPExtrPtr lastExtractor () const
 
PDFT pdf (tcPPtr parton) const
 
const CutslastCuts () const
 
tCutsPtr lastCutsPtr () const
 
const PPairlastParticles () const
 
Energy2 lastS () const
 
const PPairlastPartons () const
 
Energy2 lastSHat () const
 
double lastTau () const
 
double lastY () const
 
double lastP1 () const
 
double lastP2 () const
 
double lastL1 () const
 
double lastL2 () const
 
double lastX1 () const
 
double lastX2 () const
 
double lastE1 () const
 
double lastE2 () const
 
double lastFL1L2 () const
 
Energy2 lastScale () const
 
double lastAlphaS () const
 
double lastAlphaEM () const
 
const vector< Lorentz5Momentum > & meMomenta () const
 
double lastME2 () const
 
double lastPreweight () const
 
double jacobian () const
 
CrossSection lastMECrossSection () const
 
double lastMEPDFWeight () const
 
double lastMECouplings () const
 
tSubProPtr subProcess () const
 
const cPDVectormePartonData () const
 
const XC & lastXComb () const
 
tXCPtr lastXCombPtr () const
 
const XC & lastHeadXComb () const
 
tXCPtr lastHeadXCombPtr () const
 
const EventHandlerlastEventHandler () const
 
tPExtrPtr lastExtractor () const
 
PDFT pdf (tcPPtr parton) const
 
const CutslastCuts () const
 
tCutsPtr lastCutsPtr () const
 
const PPairlastParticles () const
 
Energy2 lastS () const
 
const PPairlastPartons () const
 
Energy2 lastSHat () const
 
double lastTau () const
 
double lastY () const
 
double lastP1 () const
 
double lastP2 () const
 
double lastL1 () const
 
double lastL2 () const
 
double lastX1 () const
 
double lastX2 () const
 
double lastE1 () const
 
double lastE2 () const
 
double lastFL1L2 () const
 
Energy2 lastScale () const
 
double lastAlphaS () const
 
double lastAlphaEM () const
 
const vector< Lorentz5Momentum > & meMomenta () const
 
double lastME2 () const
 
double lastPreweight () const
 
double jacobian () const
 
CrossSection lastMECrossSection () const
 
double lastMEPDFWeight () const
 
double lastMECouplings () const
 
tSubProPtr subProcess () const
 
const cPDVectormePartonData () const
 

Static Public Member Functions

static void Init ()
 Standard Init function used to initialize the interfaces.
 
- Static Public Member Functions inherited from ThePEG::HandlerBase
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::Interfaced
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::InterfacedBase
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::Base
static void Init ()
 

Protected Member Functions

Auxilliary virtual methods which may be verridden by sub-classes.
virtual bool checkPartonBin ()
 Check the existence of a pair of PartonBin objects corresponding to the current event. More...
 
virtual void createParticles ()
 Create instances of all particles in the event and store them in particleIndex.
 
virtual tcPBPair createPartonBinInstances ()
 Using the already created particles create a pair of PartonBinInstance objects corresponding to the incoming partons. More...
 
virtual void createBeams ()
 Create instances of the incoming beams in the event and store them in particleIndex. More...
 
virtual void connectMothers ()
 Go through the mother indices and connect up the Particles.
 
Set functions for some variables not in the Les Houches accord.
void NEvents (long x)
 The number of events in this reader. More...
 
XCombMapxCombs ()
 The map of XComb objects indexed by the corresponding PartonBin pair.
 
Standard (and non-standard) Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk. More...
 
virtual void doinitrun ()
 Initialize this object. More...
 
virtual void dofinish ()
 Finalize this object. More...
 
virtual bool preInitialize () const
 Return true if this object needs to be initialized before all other objects because it needs to extract PDFs from the event file.
 
virtual void initPDFs ()
 Called from doinit() to extract PDFs from the event file and add the corresponding objects to the current EventGenerator.
 
- Protected Member Functions inherited from ThePEG::Interfaced
void reporeg (IBPtr object, string name) const
 
bool setDefaultReference (PtrT &ptr, string classname, string objectname)
 
 Interfaced (const string &newName)
 
 Interfaced (const Interfaced &i)
 
void setGenerator (tEGPtr generator)
 
- Protected Member Functions inherited from ThePEG::InterfacedBase
virtual IBPtr clone () const=0
 
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
- Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 

Protected Attributes

HEPRUP heprup
 The HEPRUP common block.
 
HEPEUP hepeup
 The HEPEUP common block.
 
tcPDPair inData
 The ParticleData objects corresponding to the incoming particles.
 
pair< PDFPtr, PDFPtrinPDF
 The PDFBase objects which has been used for the beam particle when generating the events being read. More...
 
pair< cPDFPtr, cPDFPtroutPDF
 The PDFBase object to be used in the subsequent generation.
 
PExtrPtr thePartonExtractor
 The PartonExtractor object used to construct remnants.
 
tCascHdlPtr theCKKW
 A pointer to a CascadeHandler to be used for CKKW-reweighting.
 
PartonPairVec thePartonBins
 The pairs of PartonBin objects describing the partons which can be extracted by the PartonExtractor object.
 
XCombMap theXCombs
 The map of XComb objects indexed by the corresponding PartonBin pair.
 
CutsPtr theCuts
 The Cuts object to be used for this reader.
 
long theNEvents
 The number of events in this reader. More...
 
long position
 The number of events produced by this reader so far. More...
 
int reopened
 The number of times this reader has been reopened.
 
long theMaxScan
 The maximum number of events to scan to collect information about processes and cross sections. More...
 
bool scanning
 Flag to tell whether we are in the process of scanning.
 
bool isActive
 True if this is an active reader.
 
string theCacheFileName
 Name of file used to cache the events form the reader in a fast-readable form. More...
 
bool doCutEarly
 Determines whether to apply cuts to events before converting them to ThePEG format.
 
XSecStat stats
 Collect statistics for this reader.
 
StatMap statmap
 Collect statistics for each individual process.
 
PBIPair thePartonBinInstances
 The pair of PartonBinInstance objects describing the current incoming partons in the event.
 
ObjectIndexer< long, ColourLinecolourIndex
 Association between ColourLines and colour indices in the current translation.
 
ObjectIndexer< long, ParticleparticleIndex
 Association between Particles and indices in the current translation.
 
PPair theBeams
 The instances of the beam particles for the current event.
 
PPair theIncoming
 The instances of the incoming particles to the sub process for the current event.
 
PVector theOutgoing
 The instances of the outgoing particles from the sub process for the current event.
 
PVector theIntermediates
 The instances of the intermediate particles in the sub process for the current event.
 
CFile theCacheFile
 File stream for the cache.
 
ReweightVector reweights
 The reweight objects modifying the weights of this reader.
 
ReweightVector preweights
 The preweight objects modifying the weights of this reader.
 
double preweight
 The factor with which this reader was last pre-weighted.
 
bool reweightPDF
 Should the event be reweighted by PDFs used by the PartonExtractor?
 
bool doInitPDFs
 Should PDFBase objects be constructed from the information in the event file in the initialization?
 
int theMaxMultCKKW
 If this reader is to be used (possibly together with others) for CKKW reweighting and veto, this should give the multiplicity of outgoing particles in the highest multiplicity matrix element in the group.
 
int theMinMultCKKW
 If this reader is to be used (possibly together with others) for CKKW reweighting and veto, this should give the multiplicity of outgoing particles in the lowest multiplicity matrix element in the group.
 
double lastweight
 The weight multiplying the last read event due to PDF reweighting, CKKW reweighting or assigned reweight and preweight objects.
 
map< string, double > optionalWeights
 The optional weights associated to the last read events.
 
double maxFactor
 If the maximum cross section of this reader has been increased with increaseMaxXSec(), this is the total factor with which it has been increased.
 
int optionalnpLO
 npLO for FxFx merging
 
int optionalnpNLO
 npNLO for FxFx merging
 
CrossSection weightScale
 The (reweighted) XWGTUP value should be scaled with this cross section when compared to the overestimated cross section.
 
vector< double > xSecWeights
 Individual scales for different sub-processes if reweighted.
 
map< int, double > maxWeights
 Individual maximum weights for individual (possibly reweighted) processes.
 
bool skipping
 Is set to true when getEvent() is called from skip(int).
 
unsigned int theMomentumTreatment
 Option for the treatment of the momenta supplied.
 
bool useWeightWarnings
 Set to true if warnings about possible weight incompatibilities should be issued.
 
bool theReOpenAllowed
 Option to allow reopening of the file.
 
bool theIncludeSpin
 Use the spin information.
 
- Protected Attributes inherited from ThePEG::LastXCombInfo< XC >
XCPtr theLastXComb
 

Private Types

typedef map< int, XSecStatStatMap
 Map for accumulating statistics of cross sections per process number.
 
typedef map< tcPBPair, XCombPtrXCombMap
 Map of XComb objects describing the incoming partons indexed by the corresponding PartonBin pair.
 
typedef vector< ReweightPtrReweightVector
 A vector of pointers to ReweightBase objects.
 

Private Member Functions

void setBeamA (long id)
 Access function for the interface. More...
 
long getBeamA () const
 Access function for the interface. More...
 
void setBeamB (long id)
 Access function for the interface. More...
 
long getBeamB () const
 Access function for the interface. More...
 
void setEBeamA (Energy e)
 Access function for the interface. More...
 
Energy getEBeamA () const
 Access function for the interface. More...
 
void setEBeamB (Energy e)
 Access function for the interface. More...
 
Energy getEBeamB () const
 Access function for the interface. More...
 
void setPDFA (PDFPtr)
 Access function for the interface. More...
 
PDFPtr getPDFA () const
 Access function for the interface. More...
 
void setPDFB (PDFPtr)
 Access function for the interface. More...
 
PDFPtr getPDFB () const
 Access function for the interface. More...
 
FxFxReaderoperator= (const FxFxReader &)=delete
 Private and non-existent assignment operator.
 

Static Private Attributes

static AbstractClassDescription< FxFxReaderinitFxFxReader
 Describe an abstract base class with persistent data.
 

Friends

class FxFxEventHandler
 FxFxEventHandler should have access to our private parts.
 

Main virtual fuctions to be overridden in

sub-classes.

They are named as if we are reading from event files, but could equally well implement the actual generation of events.

vector< string > optionalWeightsNames
 
virtual void open ()=0
 Open a file or stream with events and read in the run information into the heprup variable.
 
virtual bool doReadEvent ()=0
 Read the next event from the file or stream into the corresponding protected variables. More...
 
virtual void close ()=0
 Close the file or stream from which events have been read.
 
virtual vector< string > optWeightsNamesFunc ()=0
 return the weight names
 

Access information about the current event.

double eventWeight () const
 The current event weight given by XWGTUP times possible reweighting. More...
 
const map< string, double > & optionalEventWeights () const
 Return the optional named weights associated to the current event.
 
const int & optionalEventnpLO () const
 Return the optional npLO and npNLO.
 
const int & optionalEventnpNLO () const
 
const PBIPairpartonBinInstances () const
 The pair of PartonBinInstance objects describing the current incoming partons in the event.
 
const PPairbeams () const
 Return the instances of the beam particles for the current event.
 
const PPairincoming () const
 Return the instances of the incoming particles to the sub process for the current event.
 
const PVectoroutgoing () const
 Return the instances of the outgoing particles from the sub process for the current event.
 
const PVectorintermediates () const
 Return the instances of the intermediate particles in the sub process for the current event.
 
int maxMultCKKW () const
 If this reader is to be used (possibly together with others) for CKKW reweighting and veto, this should give the multiplicity of outgoing particles in the highest multiplicity matrix element in the group.
 
int minMultCKKW () const
 If this reader is to be used (possibly together with others) for CKKW reweighting and veto, this should give the multiplicity of outgoing particles in the lowest multiplicity matrix element in the group.
 
static size_t eventSize (int N)
 Return the size of this event in bytes. More...
 

Functions for manipulating cache files.

string cacheFileName () const
 Name of file used to cache the events form the reader in a fast-readable form. More...
 
bool cutEarly () const
 Determines whether to apply cuts to events converting them to ThePEG format.
 
CFile cacheFile () const
 File stream for the cache.
 
void openReadCacheFile ()
 Open the cache file for reading.
 
void openWriteCacheFile ()
 Open the cache file for writing.
 
void closeCacheFile ()
 Close the cache file;.
 
void cacheEvent () const
 Write the current event to the cache file.
 
bool uncacheEvent ()
 Read an event from the cache file. More...
 
void reopen ()
 Reopen a reader. More...
 
template<typename T >
static char * mwrite (char *pos, const T &t, size_t n=1)
 Helper function to write a variable to a memory location.
 
template<typename T >
static const char * mread (const char *pos, T &t, size_t n=1)
 Helper function to read a variable from a memory location.
 

Additional Inherited Members

- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- Public Types inherited from ThePEG::LastXCombInfo< XC >
typedef ThePEG::Ptr< XC >::pointer XCPtr
 
typedef ThePEG::Ptr< XC >::const_pointer cXCPtr
 
typedef ThePEG::Ptr< XC >::transient_pointer tXCPtr
 
typedef ThePEG::Ptr< XC >::transient_const_pointer tcXCPtr
 
- Public Attributes inherited from ThePEG::InterfacedBase
 initializing
 
 uninitialized
 
 initialized
 
 runready
 
- Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long uniqueId
 
- Static Protected Member Functions inherited from ThePEG::Interfaced
static void registerRepository (IBPtr)
 
static void registerRepository (IBPtr, string newName)
 

Detailed Description

FxFxReader is an abstract base class to be used for objects which reads event files or streams from matrix element generators.

Derived classes must at least implement the open() and doReadEvent() methods to read in information about the whole run into the HEPRUP variable and next event into the HEPEUP variable respectively. Also the close() function to close the file or stream read must be implemented. Although these functions are named as if we are reading from event files, they could just as well implement the actual generation of events.

After filling the HEPRUP and HEPEUP variables, which are protected and easily accesible from the sub-class, this base class will then be responsible for transforming this data to the ThePEG Event record in the getEvent() method. FxFxReaders can only be used inside FxFxEventHandler objects.

In the initialization the virtual open() and scan() functions are called. Here the derived class must provide the information about the processes in the variables corresponding to the HEPRUP common block. Note that the IDWTUP is required to be +/- 1, and sub classes are required to change the information accordingly to ensure the correct corss section sampling. Note also that the controlling FxFxEventHandler may choose to generate weighted events even if IDWTUP is 1.

Note that the information given per process in e.g. the XSECUP and XMAXUP vectors is not used by the FxFxEventHandler and by default the FxFxReader is not assumed to be able to actively choose between the sub-processes. Instead, the FxFxEventHandler can handle several FxFxReader objects and choose between them. However, a sub-class of FxFxReader may set the flag isActive, in which case it is assumed to be able to select between its sub-processes itself.

The FxFxReader may be assigned a number ReweightBase objects which either completely reweights the events produced (in the reweights vector), or only biases the selection without influencing the cross section (in the preweights vector). Note that it is the responsibility of a sub-class to call the reweight() function and multiply the weight according to its return value (typically done in the readEvent() function).

See also
The interfaces defined for FxFxReader.
Event
FxFxEventHandler

Definition at line 77 of file FxFxReader.h.

Constructor & Destructor Documentation

◆ FxFxReader()

ThePEG::FxFxReader::FxFxReader ( bool  active = false)

Default constructor.

If the optional argument is true, the reader is assumed to be able to produce events on demand for a given process.

Member Function Documentation

◆ cacheFileName()

string ThePEG::FxFxReader::cacheFileName ( ) const
inlineprotected

Name of file used to cache the events form the reader in a fast-readable form.

If empty, no cache file will be generated.

Definition at line 448 of file FxFxReader.h.

References theCacheFileName.

◆ checkPartonBin()

virtual bool ThePEG::FxFxReader::checkPartonBin ( )
protectedvirtual

Check the existence of a pair of PartonBin objects corresponding to the current event.

Returns
false if no pair of suitable PartonBin objects was found.

Referenced by mread().

◆ createBeams()

virtual void ThePEG::FxFxReader::createBeams ( )
protectedvirtual

Create instances of the incoming beams in the event and store them in particleIndex.

If no beam particles are included in the event they are created from the run info.

Referenced by mread().

◆ createPartonBinInstances()

virtual tcPBPair ThePEG::FxFxReader::createPartonBinInstances ( )
protectedvirtual

Using the already created particles create a pair of PartonBinInstance objects corresponding to the incoming partons.

Return the corresponding PartonBin objects.

Referenced by mread().

◆ currentPosition()

long ThePEG::FxFxReader::currentPosition ( ) const
inline

The number of events produced so far.

Is reset to zero if an event file is reopened.

Definition at line 350 of file FxFxReader.h.

References position.

◆ dofinish()

virtual void ThePEG::FxFxReader::dofinish ( )
inlineprotectedvirtual

Finalize this object.

Called in the run phase just after a run has ended. Used eg. to write out statistics.

Reimplemented from ThePEG::InterfacedBase.

Definition at line 608 of file FxFxReader.h.

References close(), ThePEG::InterfacedBase::dofinish(), initPDFs(), and preInitialize().

◆ doinit()

virtual void ThePEG::FxFxReader::doinit ( )
protectedvirtual

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

Reimplemented in ThePEG::FxFxFileReader.

Referenced by xCombs().

◆ doinitrun()

virtual void ThePEG::FxFxReader::doinitrun ( )
protectedvirtual

Initialize this object.

Called in the run phase just before a run begins.

Reimplemented from ThePEG::InterfacedBase.

Referenced by xCombs().

◆ doReadEvent()

virtual bool ThePEG::FxFxReader::doReadEvent ( )
pure virtual

Read the next event from the file or stream into the corresponding protected variables.

Return false if there is no more events.

Implemented in ThePEG::FxFxFileReader.

◆ eventSize()

static size_t ThePEG::FxFxReader::eventSize ( int  N)
inlinestatic

Return the size of this event in bytes.

To be used for the cache file. npart is the number of particles. If npart is 0, the number is taken from NUP.

Definition at line 270 of file FxFxReader.h.

◆ eventWeight()

double ThePEG::FxFxReader::eventWeight ( ) const
inline

The current event weight given by XWGTUP times possible reweighting.

Note that this is not necessarily the same as what is returned by getEvent(), which is scaled with the maximum weight.

Definition at line 286 of file FxFxReader.h.

References hepeup, lastweight, and ThePEG::HEPEUP::XWGTUP.

◆ getBeamA()

long ThePEG::FxFxReader::getBeamA ( ) const
private

Access function for the interface.

◆ getBeamB()

long ThePEG::FxFxReader::getBeamB ( ) const
private

Access function for the interface.

◆ getEBeamA()

Energy ThePEG::FxFxReader::getEBeamA ( ) const
private

Access function for the interface.

◆ getEBeamB()

Energy ThePEG::FxFxReader::getEBeamB ( ) const
private

Access function for the interface.

◆ getEvent()

virtual double ThePEG::FxFxReader::getEvent ( )
virtual

Calls readEvent() or uncacheEvent() to read information into the FxFx common block variables.

This function is called by the FxFxEventHandler if this reader has been selectod to produce an event.

Returns
the weight asociated with this event. If negative weights are allowed it should be between -1 and 1, otherwise between 0 and 1. If outside these limits the previously estimated maximum is violated. Note that the estimated maximum then should be updated from the outside.

◆ getPDFA()

PDFPtr ThePEG::FxFxReader::getPDFA ( ) const
private

Access function for the interface.

◆ getPDFB()

PDFPtr ThePEG::FxFxReader::getPDFB ( ) const
private

Access function for the interface.

◆ getXComb()

tXCombPtr ThePEG::FxFxReader::getXComb ( )

Get an XComb object.

Converts the information in the Les Houches common block variables to an XComb object describing the sub process. This is the way information is conveyed from the reader to the controlling FxFxEventHandler.

◆ initialize()

virtual void ThePEG::FxFxReader::initialize ( FxFxEventHandler eh)
virtual

Initialize.

This function is called by the FxFxEventHandler to which this object is assigned.

Reimplemented in ThePEG::FxFxFileReader.

◆ maxScan()

long ThePEG::FxFxReader::maxScan ( ) const
inline

The maximum number of events to scan to collect information about processes and cross sections.

If less than 0, all events will be scanned.

Definition at line 357 of file FxFxReader.h.

References theMaxScan.

◆ NEvents() [1/2]

long ThePEG::FxFxReader::NEvents ( ) const
inline

The number of events found in this reader.

If less than zero the number of events are unlimited.

Definition at line 344 of file FxFxReader.h.

References theNEvents.

◆ NEvents() [2/2]

void ThePEG::FxFxReader::NEvents ( long  x)
inlineprotected

The number of events in this reader.

If less than zero the number of events is unlimited.

Definition at line 580 of file FxFxReader.h.

References theNEvents.

◆ persistentInput()

void ThePEG::FxFxReader::persistentInput ( PersistentIStream is,
int  version 
)

Function used to read in object persistently.

Parameters
isthe persistent input stream read from.
versionthe version number of the object when written.

Referenced by mread().

◆ persistentOutput()

void ThePEG::FxFxReader::persistentOutput ( PersistentOStream os) const

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

Referenced by mread().

◆ readEvent()

virtual bool ThePEG::FxFxReader::readEvent ( )
virtual

Calls doReadEvent() and performs pre-defined reweightings.

A sub-class overrides this function it must make sure that the corresponding reweightings are done.

◆ reopen()

void ThePEG::FxFxReader::reopen ( )
protected

Reopen a reader.

If we have reached the end of an event file, reopen it and issue a warning if we have used up a large fraction of it.

Referenced by cacheFile().

◆ reweight()

double ThePEG::FxFxReader::reweight ( )

Reweights the current event using the reweights and preweights vectors.

It is the responsibility of the sub-class to call this function after the HEPEUP information has been retrieved.

◆ scan()

virtual long ThePEG::FxFxReader::scan ( )
virtual

Scan the file or stream to obtain information about cross section weights and particles etc.

This function should fill the variables corresponding to the /HEPRUP/ common block. The function returns the number of events scanned.

◆ select()

void ThePEG::FxFxReader::select ( double  weight)
inline

Select the current event.

It will later be rejected with a probability given by weight.

Definition at line 383 of file FxFxReader.h.

References hepeup, ThePEG::HEPEUP::IDPRUP, ThePEG::XSecStat::select(), statmap, and stats.

◆ setBeamA()

void ThePEG::FxFxReader::setBeamA ( long  id)
private

Access function for the interface.

◆ setBeamB()

void ThePEG::FxFxReader::setBeamB ( long  id)
private

Access function for the interface.

◆ setEBeamA()

void ThePEG::FxFxReader::setEBeamA ( Energy  e)
private

Access function for the interface.

◆ setEBeamB()

void ThePEG::FxFxReader::setEBeamB ( Energy  e)
private

Access function for the interface.

◆ setPDFA()

void ThePEG::FxFxReader::setPDFA ( PDFPtr  )
private

Access function for the interface.

◆ setPDFB()

void ThePEG::FxFxReader::setPDFB ( PDFPtr  )
private

Access function for the interface.

◆ setWeightScale()

virtual void ThePEG::FxFxReader::setWeightScale ( long  neve)
virtual

Possibility for subclasses to recover from non-conformant settings of XMAXUP when an event file has been scanned with neve events.

Should set weightScale so that the average XMAXUP times weightScale gives the cross section for a process. (This is needed for MadEvent).

◆ skip()

virtual void ThePEG::FxFxReader::skip ( long  n)
virtual

Skip n events.

Used by FxFxEventHandler to make sure that a file is scanned an even number of times in case the events are not ramdomly distributed in the file.

◆ uncacheEvent()

bool ThePEG::FxFxReader::uncacheEvent ( )
protected

Read an event from the cache file.

Return false if something went wrong.

Referenced by cacheFile().

Member Data Documentation

◆ inPDF

pair<PDFPtr,PDFPtr> ThePEG::FxFxReader::inPDF
protected

The PDFBase objects which has been used for the beam particle when generating the events being read.

Specified in the interface or derived from PDFGUP and PDFSUP.

Definition at line 648 of file FxFxReader.h.

◆ position

long ThePEG::FxFxReader::position
protected

The number of events produced by this reader so far.

Is reset every time an event file is reopened.

Definition at line 692 of file FxFxReader.h.

Referenced by currentPosition().

◆ theCacheFileName

string ThePEG::FxFxReader::theCacheFileName
protected

Name of file used to cache the events form the reader in a fast-readable form.

If empty, no cache file will be generated.

Definition at line 720 of file FxFxReader.h.

Referenced by cacheFileName().

◆ theMaxScan

long ThePEG::FxFxReader::theMaxScan
protected

The maximum number of events to scan to collect information about processes and cross sections.

If less than 0, all events will be scanned.

Definition at line 704 of file FxFxReader.h.

Referenced by maxScan().

◆ theNEvents

long ThePEG::FxFxReader::theNEvents
protected

The number of events in this reader.

If less than zero the number of events is unlimited.

Definition at line 686 of file FxFxReader.h.

Referenced by NEvents().


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