Photos Class Reference

Collaboration diagram for Photos:

Public Types
enum	MomentumUnits {   DEFAULT_MOMENTUM = -1 ,   MEV ,   GEV }
	Units.

Public Member Functions
Photos &	getInstance ()
	Get instance of Photos.

Static Public Member Functions
static void	initialize ()
	Initalize Photos with the parameters previously set via the setter methods.
static void	iniInfo ()
	Prints info on Photos initialization (reinitialization) status.
static void	processParticle (PhotosParticle *p)
	Process decay of single particle.
static void	processBranch (PhotosParticle *p)
	Process decay of whole decay branch starting from given particle.
static void	suppressBremForDecay (int count, int motherID,...)
	Suppress processing of a single decay.
static void	suppressBremForBranch (int count, int motherID,...)
	Suppress processing of whole decay branch.
static void	suppressAll ()
	Suppress all processing. More...
static void	forceBremForDecay (int count, int motherID,...)
	Force processing of a single decay.
static void	forceBremForBranch (int count, int motherID,...)
	Force processing of a whole decay branch.
static void	IPHEKL_setPi0KLnoEmission (int m)
	Block emissions id decays pi0 and K_L -> gamma e+ e- 1 = no suppression 2 (default) = suppressed emissions in K_L -> gamma e+ e- ... More...
static bool	IPHQRK_setQarknoEmission (int MODCOR, int PDGID)
static void	createHistoryEntries (bool flag, int status)
	If event record allows it, create history entries of particles before Photos processing.
static void	ignoreParticlesOfStatus (int status)
	Ignore particles with given status code.
static void	deIgnoreParticlesOfStatus (int status)
	Remove 'status' from the list of ignored status codes.
static bool	isStatusCodeIgnored (int status)
	Returns 'true' if status code is ignored.
static void	setRandomGenerator (double(*gen)())
	Substitute build-in generator with external one.
static void	setSeed (int iseed1, int iseed2)
	Seed for RANMAR used by fortran part of the Photos.
static void	maxWtInterference (double interference)
	Maximum interference weight.
static void	setInfraredCutOff (double cut_off)
	Minimal energy (in units of decaying particle mass) for photons to be explicitly generated.
static void	setAlphaQED (double alpha)
	Coupling constant alpha QED.
static void	setInterference (bool interference)
	Key for interference, matrix element weight.
static void	setDoubleBrem (bool doub)
	Set double bremsstrahlung generation.
static void	setQuatroBrem (bool quatroBrem)
	Set bremsstrahlung generation up to multiplicity of 4.
static void	setCorrectionWtForW (bool corr)
static void	setExponentiation (bool expo)
	Set exponentiation mode.
static void	setPairEmission (bool ifpair)
	Set pair emission.
static void	setPhotonEmission (bool ifphot)
	Set photon emission.
static void	setMeCorrectionWtForScalar (bool corr)
	Switch for complete effects of matrix element (in scalar to 2 scalars decays)
static void	setMeCorrectionWtForW (bool corr)
	Switch for complete effects of matrix element (in leptonic W decays)
static void	setMeCorrectionWtForZ (bool corr)
	Switch for complete effects of matrix element (in leptonic Z decays)
static void	setTopProcessRadiation (bool top)
	Set photon emission in top pair production in quark (gluon) pair annihilation.
static void	setMomentumUnit (MomentumUnits unit)
	Set momentum unit.
static void	setStopAtCriticalError (bool stop)
static void	initializeKinematicCorrections (int flag)
	Initialize kinematic corrections.
static void	forceMassFrom4Vector (bool flag)
	Force mass value to be sqrt(e^2-p^2) for all particle momenta taken from event record. More...
static void	forceMassFromEventRecord (int pdgid)
	When particles with PDGID and -PDGID will be processed by Photos, their mass value will be taken from event record instead of being calculated from 4-vector. More...
static void	forceMass (int pdgid, double mass)
	When particles with PDGID and -PDGID will be processed by Photos, their mass value will be given by user instead of being calculated from 4-vector. More...
static void	setMomentumConservationThreshold (double threshold)
	set energy momentum conservation threshold
static void	setEventNo (int iEvt)
	set event no

Static Public Attributes
static const int	VER_MAJOR = 3
static const int	VER_MINOR = 64
static const int	DAT_DAY = 18
static const int	DAT_MONTH = 2
static const int	DAT_YEAR = 20
static enum Photospp::Photos::MomentumUnits	momentumUnit = Photos::DEFAULT_MOMENTUM
static int	EventNo = 0
	Is event No.
static bool	isSuppressed = false
	Is in suppressed mode.
static bool	massFrom4Vector = true
	Is mass from 4-vector or from event record.
static vector< vector< int > * > *	supBremList = 0
	List of suppressed decays.
static vector< vector< int > * > *	forceBremList = 0
	List of forced decays.
static vector< pair< int, double > * > *	forceMassList = 0
	List of forced mass values.
static vector< int > *	ignoreStatusCodeList = 0
	List of ignored status codes.
static double	momentum_conservation_threshold = 0.1
	Threshold for momentum conservation check.
static bool	meCorrectionWtForScalar = false
	Flag for complete effects of matrix element (in scalars decays)
static bool	meCorrectionWtForZ = false
	Flag for complete effects of matrix element (in leptonic Z decays)
static bool	meCorrectionWtForW = false
	Flag for complete effects of matrix element (in leptonic W decays)
static bool	isCreateHistoryEntries = false
	Flag for creating historic entries.
static bool	IfPair = false
	Flag for generating emission of pairs.
static bool	IfPhot = true
	Flag for generating emission of photons.
static int	historyEntriesStatus = 3
	Status of history entries.
static double(*	randomDouble )() = PhotosRandom::randomReal
	Pointer to random generator function.

Private Member Functions
	Photos (const Photos &)
Photos &	operator= (const Photos &)

Static Private Attributes
static Photos	_instance

Detailed Description

Definition at line 30 of file Photos.h.

Member Function Documentation

forceMass()

void forceMass ( int  pdgid, double  mass  )

static

When particles with PDGID and -PDGID will be processed by Photos, their mass value will be given by user instead of being calculated from 4-vector.

This works only if 'forceMassFrom4Vector' is set to 'true' (default) This routine may be executed several times with different PDGID values.

Definition at line 443 of file Photos.cc.

  {
    if (mass < 0.0) {
      Log::Warning() << "Photos::forceMass: Mass must be > 0.0" << endl;
      return;
    }
 
    if (!forceMassList) forceMassList = new vector<pair<int, double>* >();
    forceMassList->push_back(new pair<int, double>(pdgid, mass));
  }

forceMassFrom4Vector()

static void forceMassFrom4Vector ( bool  flag )

inlinestatic

Force mass value to be sqrt(e^2-p^2) for all particle momenta taken from event record.

May be important for numerical stability. May lead to faulty results due to rounding errors for hiper-relativistic electron, for example.

Definition at line 153 of file Photos.h.

{ massFrom4Vector = flag; }

forceMassFromEventRecord()

void forceMassFromEventRecord ( int  pdgid )

static

When particles with PDGID and -PDGID will be processed by Photos, their mass value will be taken from event record instead of being calculated from 4-vector.

This works only if 'forceMassFrom4Vector' is set to 'true' (default) This routine may be executed several times with different PDGID values.

Definition at line 437 of file Photos.cc.

IPHEKL_setPi0KLnoEmission()

void IPHEKL_setPi0KLnoEmission ( int  m )

static

Block emissions id decays pi0 and K_L -> gamma e+ e- 1 = no suppression 2 (default) = suppressed emissions in K_L -> gamma e+ e- ...

and all pi0 decays

Definition at line 299 of file Photos.cc.

suppressAll()

static void suppressAll ( )

inlinestatic

Suppress all processing.

Only forced decays will be processed.

Definition at line 60 of file Photos.h.

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

• generators/kkmc/photospp/Photos.h
• generators/kkmc/photospp/Photos.cc