Generate Collision. More...

#include <InitialParticleGeneration.h>

Collaboration diagram for InitialParticleGeneration:

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Public Member Functions
	InitialParticleGeneration (int allowedFlags=0)
	constructor More...

MCInitialParticles &	generate ()
	Generate a new event.

ROOT::Math::XYZVector	getVertexConditional ()
	Generate vertex position and possibly update the generator of Lorentz transformation.

ROOT::Math::XYZVector	updateVertex (bool force=false)
	Update the vertex position: More...

const BeamParameters &	getBeamParameters () const
	Return reference to nominal beam parameters.

void	initialize ()
	function to be executed on initialize()

void	setAllowedFlags (int allowedFlags)
	Set allowed flags.

ConditionalGaussGenerator	initConditionalGenerator (const ROOT::Math::PxPyPzEVector &pHER, const ROOT::Math::PxPyPzEVector &pLER, const TMatrixDSym &covHER, const TMatrixDSym &covLER)
	Initialize the conditional generator using HER & LER 4-vectors and HER & LER covariance matrices describing spread.

double	getNominalEcms ()
	Get the CMS energy of collisions.

double	getNominalEcmsSpread ()
	Get spread of CMS collision energy calculated from beam parameters.

const ConditionalGaussGenerator &	getLorentzGenerator ()
	Get the generator for the Lorentz transformation.

Private Member Functions
MCInitialParticles &	generate (int allowedFlags)
	Generate a new event wit a particular set of allowed flags. More...

TMatrixDSym	adjustCovMatrix (TMatrixDSym cov) const
	adjust smearing covariance matrix based on the generation flags

ROOT::Math::XYZVector	generateVertex (const ROOT::Math::XYZVector &initial, const TMatrixDSym &cov, MultivariateNormalGenerator &gen) const
	generate the vertex More...

ROOT::Math::PxPyPzEVector	generateBeam (const ROOT::Math::PxPyPzEVector &initial, const TMatrixDSym &cov, MultivariateNormalGenerator &gen) const
	generate 4 vector for one beam More...

Private Attributes
DBObjPtr< BeamParameters >	m_beamParams
	Datastore object containing the nominal beam parameters.

StoreObjPtr< MCInitialParticles >	m_event
	Datastore object containing the generated event.

MultivariateNormalGenerator	m_generateHER
	Generator for HER.

MultivariateNormalGenerator	m_generateLER
	Generator for LER.

MultivariateNormalGenerator	m_generateVertex
	Generator for Vertex.

ConditionalGaussGenerator	m_generateLorentzTransformation
	Generator of the Lorentz transformation.

int	m_allowedFlags
	Allowed generation flags.

Detailed Description

Generate Collision.

This class is meant to be a common interface to be used by physics generators for generating the initial beam collision.

A generator module should have this class as a member. In each event, a call to generate() will return the initial event information and also automatically put it in the datastore.

Definition at line 35 of file InitialParticleGeneration.h.