HEJ::EventReweighter Class Reference

Main class for reweighting events in HEJ. More...

#include <EventReweighter.hh>

Public Member Functions
	EventReweighter (Beam const &beam, int pdf_id, ScaleGenerator scale_gen, EventReweighterConfig conf, std::shared_ptr< RNG > ran)
	EventReweighter (LHEF::HEPRUP const &heprup, ScaleGenerator scale_gen, EventReweighterConfig conf, std::shared_ptr< RNG > ran)
PDF const &	pdf () const
	Get the used pdf. More...
bool	pass_low_pt (HEJ::Event const &input_ev)
	Check the lowpt only restriction passes for lowpt runs. More...
EventTreatment	treatment (EventType type) const
	Get event treatment. More...
std::vector< Event >	reweight (Event const &ev, std::size_t num_events)
	Generate resummation events for a given fixed-order event. More...
std::vector< StatusCode > const &	status () const
	Gives all StatusCodes of the last reweight() More...

Detailed Description

Main class for reweighting events in HEJ.

Constructor & Destructor Documentation

EventReweighter() [1/2]

HEJ::EventReweighter::EventReweighter	(	Beam const &	beam,
		int	pdf_id,
		ScaleGenerator	scale_gen,
		EventReweighterConfig	conf,
		std::shared_ptr< RNG >	ran
	)

Parameters

beam	Beam Energy
pdf_id	PDF ID
scale_gen	Scale settings
conf	Configuration parameters
ran	Random number generator

EventReweighter() [2/2]

HEJ::EventReweighter::EventReweighter	(	LHEF::HEPRUP const &	heprup,
		ScaleGenerator	scale_gen,
		EventReweighterConfig	conf,
		std::shared_ptr< RNG >	ran
	)

Parameters

heprup	LHEF event header
scale_gen	Scale settings
conf	Configuration parameters
ran	Random number generator

Member Function Documentation

pass_low_pt()

bool HEJ::EventReweighter::pass_low_pt

(

HEJ::Event const &

input_ev

)

Check the lowpt only restriction passes for lowpt runs.

pdf()

PDF const & HEJ::EventReweighter::pdf

(

)

const

Get the used pdf.

reweight()

std::vector< Event > HEJ::EventReweighter::reweight	(	Event const &	ev,
		std::size_t	num_events
	)

Generate resummation events for a given fixed-order event.

Parameters

ev	Fixed-order event corresponding to the resummation events
num_events	Number of trial resummation configurations.

Returns

A vector of resummation events.

The result vector depends on the type of the input event and the EventTreatment of different types as specified in the constructor:

• EventTreatment::reweight: The result vector contains between 0 and num_events resummation events.
• EventTreatment::keep: If the input event passes the resummation jet cuts the result vector contains one event. Otherwise it is empty.
• EventTreatment::discard: The result vector is empty

status()

std::vector< StatusCode > const & HEJ::EventReweighter::status ( ) const

inline

Gives all StatusCodes of the last reweight()

Each StatusCode corresponds to one tried generation. Only good StatusCodes generated an event.

treatment()

EventTreatment HEJ::EventReweighter::treatment

(

EventType

type

)

const

Get event treatment.

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

• /home/andersen/HEJProjects/website/build/hej/include/HEJ/EventReweighter.hh