FCCAnalyses::JetClusteringUtils Namespace Reference

Jet clustering interface utilities. More...

Classes
struct	recoilBuilder
struct	resonanceBuilder
struct	sel_pt
	Select clustered jets with transverse momentum greader than a minimum value [GeV]. More...

Functions
std::vector< fastjet::PseudoJet >	set_pseudoJets (const ROOT::VecOps::RVec< float > &px, const ROOT::VecOps::RVec< float > &py, const ROOT::VecOps::RVec< float > &pz, const ROOT::VecOps::RVec< float > &e)
	Set fastjet pseudoJet for later reconstruction.
std::vector< fastjet::PseudoJet >	set_pseudoJets_xyzm (const ROOT::VecOps::RVec< float > &px, const ROOT::VecOps::RVec< float > &py, const ROOT::VecOps::RVec< float > &pz, const ROOT::VecOps::RVec< float > &m)
	Set fastjet pseudoJet for later reconstruction using px, py, pz and m.
ROOT::VecOps::RVec< fastjet::PseudoJet >	get_pseudoJets (const JetClustering::FCCAnalysesJet &in)
	Get fastjet pseudoJet after reconstruction from FCCAnalyses jets.
std::vector< std::vector< int > >	get_constituents (const JetClustering::FCCAnalysesJet &in)
	Get fastjet constituents after reconstruction from FCCAnalyses jets.
float	get_exclusive_dmerge (const JetClustering::FCCAnalysesJet &in, int n)
	return the dmin corresponding to the recombination that went from n+1 to n jets
float	get_exclusive_dmerge_max (const JetClustering::FCCAnalysesJet &in, int n)
ROOT::VecOps::RVec< float >	get_px (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet px.
ROOT::VecOps::RVec< float >	get_py (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet py.
ROOT::VecOps::RVec< float >	get_pz (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet pz.
ROOT::VecOps::RVec< float >	get_e (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet energy.
ROOT::VecOps::RVec< float >	get_pt (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet pt.
ROOT::VecOps::RVec< float >	get_p (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet p.
ROOT::VecOps::RVec< float >	get_m (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet mass.
ROOT::VecOps::RVec< float >	get_eta (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet eta.
ROOT::VecOps::RVec< float >	get_phi (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet phi.
ROOT::VecOps::RVec< float >	get_phi_std (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet phi.
ROOT::VecOps::RVec< float >	get_theta (const ROOT::VecOps::RVec< fastjet::PseudoJet > &in)
	Get jet theta.
JetClustering::FCCAnalysesJet	initialise_FCCAnalysesJet ()
	Internal methods.
JetClustering::FCCAnalysesJet	build_FCCAnalysesJet (const std::vector< fastjet::PseudoJet > &in, const std::vector< float > &dmerge, const std::vector< float > &dmerge_max)
std::vector< fastjet::PseudoJet >	build_jets (fastjet::ClusterSequence &cs, int exclusive, float cut, int sorted)
bool	check (unsigned int n, int exclusive, float cut)
fastjet::RecombinationScheme	recomb_scheme (int recombination)
std::vector< float >	exclusive_dmerge (fastjet::ClusterSequence &cs, int do_dmarge_max)

Variables
const int	Nmax_dmerge = 10
	Maximum number of d_{n, n+1} that are kept in FCCAnalysesJet.

Detailed Description

Jet clustering interface utilities.

This represents a set functions and utilities to perform jet clustering from a list of particles.

Function Documentation

build_FCCAnalysesJet()

JetClustering::FCCAnalysesJet FCCAnalyses::JetClusteringUtils::build_FCCAnalysesJet	(	const std::vector< fastjet::PseudoJet > &	in,
		const std::vector< float > &	dmerge,
		const std::vector< float > &	dmerge_max
	)

build_jets()

std::vector< fastjet::PseudoJet > FCCAnalyses::JetClusteringUtils::build_jets	(	fastjet::ClusterSequence &	cs,
		int	exclusive,
		float	cut,
		int	sorted
	)

check()

bool FCCAnalyses::JetClusteringUtils::check	(	unsigned int	n,
		int	exclusive,
		float	cut
	)

exclusive_dmerge()

std::vector< float > FCCAnalyses::JetClusteringUtils::exclusive_dmerge	(	fastjet::ClusterSequence &	cs,
		int	do_dmarge_max
	)

get_constituents()

std::vector< std::vector< int > > FCCAnalyses::JetClusteringUtils::get_constituents

(

const JetClustering::FCCAnalysesJet &

in

)

Get fastjet constituents after reconstruction from FCCAnalyses jets.

get_e()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_e

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet energy.

Details.

get_eta()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_eta

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet eta.

Details.

get_exclusive_dmerge()

float FCCAnalyses::JetClusteringUtils::get_exclusive_dmerge	(	const JetClustering::FCCAnalysesJet &	in,
		int	n
	)

return the dmin corresponding to the recombination that went from n+1 to n jets

get_exclusive_dmerge_max()

float FCCAnalyses::JetClusteringUtils::get_exclusive_dmerge_max	(	const JetClustering::FCCAnalysesJet &	in,
		int	n
	)

get_m()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_m

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet mass.

Details.

get_p()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_p

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet p.

Details.

get_phi()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_phi

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet phi.

Details (range [0,2*pi]).

get_phi_std()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_phi_std

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet phi.

Details (range [-pi,pi]).

get_pseudoJets()

ROOT::VecOps::RVec< fastjet::PseudoJet > FCCAnalyses::JetClusteringUtils::get_pseudoJets

(

const JetClustering::FCCAnalysesJet &

in

)

Get fastjet pseudoJet after reconstruction from FCCAnalyses jets.

get_pt()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_pt

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet pt.

Details.

get_px()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_px

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet px.

Details.

get_py()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_py

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet py.

Details.

get_pz()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_pz

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet pz.

Details.

get_theta()

ROOT::VecOps::RVec< float > FCCAnalyses::JetClusteringUtils::get_theta

(

const ROOT::VecOps::RVec< fastjet::PseudoJet > &

in

)

Get jet theta.

Details.

initialise_FCCAnalysesJet()

JetClustering::FCCAnalysesJet FCCAnalyses::JetClusteringUtils::initialise_FCCAnalysesJet

(

)

Internal methods.

recomb_scheme()

fastjet::RecombinationScheme FCCAnalyses::JetClusteringUtils::recomb_scheme

(

int

recombination

)

set_pseudoJets()

std::vector< fastjet::PseudoJet > FCCAnalyses::JetClusteringUtils::set_pseudoJets	(	const ROOT::VecOps::RVec< float > &	px,
		const ROOT::VecOps::RVec< float > &	py,
		const ROOT::VecOps::RVec< float > &	pz,
		const ROOT::VecOps::RVec< float > &	e
	)

Set fastjet pseudoJet for later reconstruction.

set_pseudoJets_xyzm()

std::vector< fastjet::PseudoJet > FCCAnalyses::JetClusteringUtils::set_pseudoJets_xyzm	(	const ROOT::VecOps::RVec< float > &	px,
		const ROOT::VecOps::RVec< float > &	py,
		const ROOT::VecOps::RVec< float > &	pz,
		const ROOT::VecOps::RVec< float > &	m
	)

Set fastjet pseudoJet for later reconstruction using px, py, pz and m.

This version is to be preferred over the px,py,pz,E version when m is known accurately, because it uses double precision to reconstruct the energy, reducing the size of rounding errors on FastJet calculations (e.g. of PseudoJet masses)

Variable Documentation

Nmax_dmerge

const int FCCAnalyses::JetClusteringUtils::Nmax_dmerge = 10

Maximum number of d_{n, n+1} that are kept in FCCAnalysesJet.