Implementation of the event generator. More...

#include <Generate.h>

Collaboration diagram for MCBooster::PhaseSpace:

Public Member Functions
	PhaseSpace (GReal_t _MotherMass, vector< GReal_t > _Masses, GLong_t _NEvents)
	PhaseSpace ctor. More...

	~PhaseSpace ()
	PhaseSpace() dtor. More...

void	FreeResources ()
	Free resources. More...

void	Generate (Particles_d fMothers)

void	Generate (const Vector4R fMother)

Particles_d &	GetDaughters (GInt_t i)
	Get the daughter with index 'i' in the mass array. More...

GInt_t	GetNDaughters () const
	Returns the number of daughter particles. More...

GLong_t	GetNEvents () const
	Returns the number of events. More...

GLong_t	GetNAccepted () const

const RealVector_d &	GetWeights () const
	Returns a device vector with the event weights. More...

GReal_t	GetEvtTime () const
	Returns the time spent in seconds to process the random numbers and set the phase space four-vectors. More...

GReal_t	GetExpTime () const
	Returns the time spent in seconds to export the generated events to a Events container. More...

GReal_t	GetRndTime () const
	Returns the time spent in seconds to generate the random numbers necessary for the calculation. More...

GReal_t	GetMaxWeight () const
	Returns the max event weight that can be found in the generated sample. More...

GInt_t	GetSeed () const

void	SetSeed (GInt_t _seed)

void	Export (Events *_Events)
	Export the events and all related information to host. More...

void	ExportUnweighted (Events *_Events)

GULong_t	Unweight ()
	Flag the accepted and rejected events. More...

void	Allocate (const GLong_t _nevents)
	Allocate resources on the device for event generation. More...

GReal_t	PDK (const GReal_t a, const GReal_t b, const GReal_t c) const
	PDK function. More...

Detailed Description

Basic usage:

#include <mcbooster/GTypes.h>
#include <mcbooster/Vector4R.h>
#include <mcbooster/Generate.h>
 ...
 //setting the mother particle
 Vector4R B0(5.2795, 0.0, 0.0, 0.0);
 //setting the masses of the daughter particles
 vector<GReal_t> masses;
 masses.push_back(3.096916); // J/psi
 masses.push_back(0.493677); // K
 masses.push_back(0.13957018); // pi
 //generator ctor for 10M events
 PhaseSpace phsp(B0.mass(), massesB0, 10000000);
 //run the generator
      phsp.Generate(B0);
 //flag the accepted and rejected events
 phsp.Unweight();
 //export events to the host (in case it is necessary)
 Events *GenEvents = new Events(masses.size(), 10000000);
 phsp.Export(GenEvents);
 ...

Definition at line 165 of file Generate.h.

Constructor & Destructor Documentation

MCBooster::PhaseSpace::PhaseSpace	(	GReal_t	_MotherMass,
		vector< GReal_t >	_Masses,
		GLong_t	_NEvents
	)

inline

Constructor of the phase-space generator takes as input parameters:

_MotherMass: the mass of the mother particle in Gev/c*c
_Masses: STL vector with the mass of the daughter particles.
_NEvents: it is the number of events to be generated.

Definition at line 174 of file Generate.h.

MCBooster::PhaseSpace::~PhaseSpace ( )

inline

The destructor explicitly frees all the resources owned by the class.

Definition at line 211 of file Generate.h.

Member Function Documentation

void MCBooster::PhaseSpace::Allocate ( const GLong_t _nevents )

inline

Definition at line 324 of file Generate.h.

void MCBooster::PhaseSpace::Export ( Events * _Events )

Export the events and all related information to an Events object properly initialized.

Definition at line 474 of file Generate.h.

References CUDA_CHECK_RETURN, MCBooster::Events::fAccRejFlags, MCBooster::Events::fDaughters, MCBooster::Events::fMaxWeight, and MCBooster::Events::fWeights.

void MCBooster::PhaseSpace::ExportUnweighted ( Events * _Events )

Export the events and all related information to an Events object properly initialized.

Definition at line 397 of file Generate.h.

References CUDA_CHECK_RETURN, MCBooster::Events::fAccRejFlags, MCBooster::Events::fDaughters, MCBooster::Events::fMaxWeight, and MCBooster::Events::fWeights.

void MCBooster::PhaseSpace::FreeResources ( )

inline

Free resources owned in host and device side by the PhaseSpace object.

Definition at line 221 of file Generate.h.

void MCBooster::PhaseSpace::Generate ( Particles_d fMothers )

Run the generator and calculate the maximum weight. It takes as input the device vector with the four-vectors of the mother particle in any system of reference. The daughters will be generated in this system.

Definition at line 669 of file Generate.h.

References MCBooster::time_diff(), and TIMER.

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void MCBooster::PhaseSpace::Generate ( const Vector4R fMother )

Run the generator and calculate the maximum weight. It takes as input the fourvector of the mother particle in any system of reference. The daughters will be generated in this system.

Definition at line 541 of file Generate.h.

References MCBooster::time_diff(), and TIMER.

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Particles_d& MCBooster::PhaseSpace::GetDaughters ( GInt_t i )

inline

It return a device vector of particles by reference. Is responsibility of the user modify or not the particles in the container.

Definition at line 243 of file Generate.h.

GReal_t MCBooster::PhaseSpace::GetEvtTime ( ) const

inline

Definition at line 274 of file Generate.h.

GReal_t MCBooster::PhaseSpace::GetExpTime ( ) const

inline

Definition at line 281 of file Generate.h.

GReal_t MCBooster::PhaseSpace::GetMaxWeight ( ) const

inline

Larger the sample, more accurate is this number.

Definition at line 296 of file Generate.h.

GLong_t MCBooster::PhaseSpace::GetNAccepted ( ) const

inline

Definition at line 260 of file Generate.h.

GInt_t MCBooster::PhaseSpace::GetNDaughters ( ) const

inline

Definition at line 249 of file Generate.h.

GLong_t MCBooster::PhaseSpace::GetNEvents ( ) const

inline

Definition at line 256 of file Generate.h.

GReal_t MCBooster::PhaseSpace::GetRndTime ( ) const

inline

Definition at line 288 of file Generate.h.

GInt_t MCBooster::PhaseSpace::GetSeed ( ) const

inline

Definition at line 300 of file Generate.h.

const RealVector_d& MCBooster::PhaseSpace::GetWeights ( ) const

inline

Definition at line 267 of file Generate.h.

GReal_t MCBooster::PhaseSpace::PDK	(	const GReal_t	a,
		const GReal_t	b,
		const GReal_t	c
	)		const

inline

Definition at line 337 of file Generate.h.

void MCBooster::PhaseSpace::SetSeed ( GInt_t _seed )

inline

Definition at line 304 of file Generate.h.

GULong_t MCBooster::PhaseSpace::Unweight ( )

Flag the accepted and rejected events

Definition at line 363 of file Generate.h.

References MCBooster::kTrue.

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

Generate.h

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation