siscone_spherical::CSphsplit_merge_ptcomparison Class Reference

a class that allows us to carry out comparisons of pt of jets, using information from exact particle contents where necessary. More...

#include <split_merge.h>

Public Member Functions
	CSphsplit_merge_ptcomparison ()
	default ctor
std::string	SM_scale_name () const
	return the name corresponding to the SM scale variable
bool	operator() (const CSphjet &jet1, const CSphjet &jet2) const
	comparison of 2 CSphjet
void	get_difference (const CSphjet &j1, const CSphjet &j2, CSphmomentum *v, double *E_tilde) const
	get the difference between 2 jets, calculated such that rounding errors will not affect the result even if the two jets have almost the same content (so that the difference is below the rounding errors) More...

Public Attributes
std::vector< CSphmomentum > *	particles
	pointer to the list of particles
std::vector< double > *	particles_norm2
	pointer to the particles's norm^2
Esplit_merge_scale	split_merge_scale
	the following parameter controls the variable we're using for the split-merge process i.e. More...

Detailed Description

a class that allows us to carry out comparisons of pt of jets, using information from exact particle contents where necessary.

Definition at line 114 of file split_merge.h.

Member Function Documentation

void siscone_spherical::CSphsplit_merge_ptcomparison::get_difference	(	const CSphjet &	j1,
		const CSphjet &	j2,
		CSphmomentum *	v,
		double *	E_tilde
	)		const

get the difference between 2 jets, calculated such that rounding errors will not affect the result even if the two jets have almost the same content (so that the difference is below the rounding errors)

Parameters

j1	first jet
j2	second jet
v	jet1-jet2
E_tilde	jet1-jet2 E_tilde

Definition at line 165 of file split_merge.cpp.

References siscone_spherical::CSphjet::contents, siscone_spherical::CSphmomentum::E, siscone_spherical::CSphjet::n, and siscone_spherical::CSphjet::v.

Member Data Documentation

Esplit_merge_scale siscone_spherical::CSphsplit_merge_ptcomparison::split_merge_scale

the following parameter controls the variable we're using for the split-merge process i.e.

the variable we use for

1. ordering jet candidates;
2. computing the overlap fraction of two candidates. The default value uses Etilde. The other alternative is E NOTE: Modifying the default choice can have nasty effects:

using E is IR-safe for QCD jets but the IR unsafety remains for back-to-back jets of unstable narrow-width particles (e.g. Higgs). Therefore, keeping the default value is strongly advised.

Definition at line 153 of file split_merge.h.

Referenced by SM_scale_name().

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

• siscone/spherical/split_merge.h
• siscone/spherical/split_merge.cpp