Jet Radiation Radius

Zhenyu Han

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Jet Radiation Radius

Zhenyu Han

High Energy Physics - Phenomenology · Submitted 6 Feb 2014

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim In both cases, smaller (sub)jet radii are preferred for jets with higher PTs, albeit due to different mechanisms: the running of the QCD coupling constant and the boost to a color singlet system.

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What the abstract itself states, as probabilities: claims first 0.07 · states limitation 0.17 · human participants 0.01 · controlled comparison 0.18 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.79 · mentions code or data availability 0.02.

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arXiv listing abstract v1. Results and the main claim are underlined; show every role.

Jet radiation patterns are indispensable for the purpose of discriminating partons' with different quantum numbers. However, they are also vulnerable to various contaminations from the underlying event, pileup, and radiation of adjacent jets. In order to maximize the discrimination power, it is essential to optimize the jet radius used when analyzing the radiation patterns. We introduce the concept of jet radiation radius which quantifies how the jet radiation is distributed around the jet axes. We study the color and momentum dependence of the jet radiation radius, and discuss two applications: quark-gluon discrimination and $W$ jet tagging. In both cases, smaller (sub)jet radii are preferred for jets with higher PTs, albeit due to different mechanisms: the running of the QCD coupling constant and the boost to a color singlet system. A shrinking cone W jet tagging algorithm is proposed to achieve better discrimination than previous methods.

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Jet radiation patterns are indispensable for the purpose of discriminating partons' with different quantum numbers.	background 1.00	0.05	0.03	asserted 1.00
s1	However, they are also vulnerable to various contaminations from the underlying event, pileup, and radiation of adjacent jets.	background 0.91	0.07	0.02	asserted 1.00
s2	In order to maximize the discrimination power, it is essential to optimize the jet radius used when analyzing the radiation patterns.	background 0.85	0.07	0.08	asserted 1.00
s3	We introduce the concept of jet radiation radius which quantifies how the jet radiation is distributed around the jet axes.	contribution 0.98	0.79	0.08	asserted 1.00
s4	We study the color and momentum dependence of the jet radiation radius, and discuss two applications: quark-gluon discrimination and $W$ jet tagging.	contribution 1.00	0.92	0.11	asserted 0.94
s5	In both cases, smaller (sub)jet radii are preferred for jets with higher PTs, albeit due to different mechanisms: the running of the QCD coupling constant and the boost to a color singlet system.	result 0.94	0.84	0.54	asserted 1.00
s6	A shrinking cone W jet tagging algorithm is proposed to achieve better discrimination than previous methods.	contribution 0.71	0.85	0.37	asserted 0.87

What kind of paper the classifier reports this is: method or tool 1.00 · evidence from simulation or computation 0.62.

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Original abstract

Jet radiation patterns are indispensable for the purpose of discriminating partons' with different quantum numbers. However, they are also vulnerable to various contaminations from the underlying event, pileup, and radiation of adjacent jets. In order to maximize the discrimination power, it is essential to optimize the jet radius used when analyzing the radiation patterns. We introduce the concept of jet radiation radius which quantifies how the jet radiation is distributed around the jet axes. We study the color and momentum dependence of the jet radiation radius, and discuss two applications: quark-gluon discrimination and $W$ jet tagging. In both cases, smaller (sub)jet radii are preferred for jets with higher PTs, albeit due to different mechanisms: the running of the QCD coupling constant and the boost to a color singlet system. A shrinking cone W jet tagging algorithm is proposed to achieve better discrimination than previous methods.

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Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites · 20 sentences without a confident label

Builds on 2 papers

The study has been extended to the LHC in Refs. [ref] where the criterion for optimizing the jet radius is to obtain the best mass resolution for new massive hadronically decaying resonances.

Quantifying the performance of jet definitions for kinematic reconstruction at the LHC · Introduction · 0.84
The study has been extended to the LHC in Refs. [ref] where the criterion for optimizing the jet radius is to obtain the best mass resolution for new massive hadronically decaying resonances.

Optimal jet radius in kinematic dijet reconstruction · Introduction · 0.84

Uses the method or tool of 6 papers

In this article, we will rely on Pythia 8 [ref] simulations to calculate the jet radiation radius, leaving analytical calculations to future studies.

A Brief Introduction to PYTHIA 8.1 · Definition · 1.00
We then apply the anti-$k_t$ algorithm with various $R$'s for jet clustering, using FastJet [ref] .

Dispelling the N^3 myth for the Kt jet-finder · Dijets: Quark and gluon discrimination · 1.00
In this algorithm, we start as usual with a fat jet that contains a $W$ boson or its QCD counterpart, and use a jet grooming method [ref] to reconstruct the kinematics of the $W$ decay.

Jet substructure as a new Higgs search channel at the LHC · Introduction · 0.90

Cites as background 4 papers

To see this, we consider dijet events at the LHC[We refer readers to Refs. [ref] for a comprehensive study of quark-gluon discrimination.

Pure Samples of Quark and Gluon Jets at the LHC · Dijets: Quark and gluon discrimination · 0.93
To see this, we consider dijet events at the LHC[We refer readers to Refs. [ref] for a comprehensive study of quark-gluon discrimination.

Quark and Gluon Jet Substructure · Dijets: Quark and gluon discrimination · 0.93
The first two handles have been used routinely in high energy experiments, while the last, though receiving significant amount of studies recently[See Ref. [ref] for a review and more references.], has not been used as commonly.

TASI Lectures on Jet Substructure · Introduction · 0.97

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