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Title: Jet Topics: Disentangling Quarks and Gluons at Colliders

Abstract

Here, we introduce jet topics: a framework to identify underlying classes of jets from collider data. Because of a close mathematical relationship between distributions of observables in jets and emergent themes in sets of documents, we can apply recent techniques in “topic modeling” to extract jet topics from the data with minimal or no input from simulation or theory. As a proof of concept with parton shower samples, we apply jet topics to determine separate quark and gluon jet distributions for constituent multiplicity. We also determine separate quark and gluon rapidity spectra from a mixed Z-plus-jet sample. While jet topics are defined directly from hadron-level multidifferential cross sections, one can also predict jet topics from first-principles theoretical calculations, with potential implications for how to define quark and gluon jets beyond leading-logarithmic accuracy. These investigations suggest that jet topics will be useful for extracting underlying jet distributions and fractions in a wide range of contexts at the Large Hadron Collider.

Authors:
;
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1441237
Alternate Identifier(s):
OSTI ID: 1502080
Grant/Contract Number:  
SC0011090; SC0012567
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 120 Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Metodiev, Eric M., and Thaler, Jesse. Jet Topics: Disentangling Quarks and Gluons at Colliders. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.241602.
Metodiev, Eric M., & Thaler, Jesse. Jet Topics: Disentangling Quarks and Gluons at Colliders. United States. doi:10.1103/PhysRevLett.120.241602.
Metodiev, Eric M., and Thaler, Jesse. Tue . "Jet Topics: Disentangling Quarks and Gluons at Colliders". United States. doi:10.1103/PhysRevLett.120.241602.
@article{osti_1441237,
title = {Jet Topics: Disentangling Quarks and Gluons at Colliders},
author = {Metodiev, Eric M. and Thaler, Jesse},
abstractNote = {Here, we introduce jet topics: a framework to identify underlying classes of jets from collider data. Because of a close mathematical relationship between distributions of observables in jets and emergent themes in sets of documents, we can apply recent techniques in “topic modeling” to extract jet topics from the data with minimal or no input from simulation or theory. As a proof of concept with parton shower samples, we apply jet topics to determine separate quark and gluon jet distributions for constituent multiplicity. We also determine separate quark and gluon rapidity spectra from a mixed Z-plus-jet sample. While jet topics are defined directly from hadron-level multidifferential cross sections, one can also predict jet topics from first-principles theoretical calculations, with potential implications for how to define quark and gluon jets beyond leading-logarithmic accuracy. These investigations suggest that jet topics will be useful for extracting underlying jet distributions and fractions in a wide range of contexts at the Large Hadron Collider.},
doi = {10.1103/PhysRevLett.120.241602},
journal = {Physical Review Letters},
number = 24,
volume = 120,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevLett.120.241602

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1. FIG. 1. : The generation of mixed samples of quark and gluon jets highlighting the correspondence with topic models. Each jet is either a quark or gluon jet sampled according to the underlying quark fraction. The observable is then sampled according to a universal distribution for that jet type. Eachmore » mixed-sample observable distribution is then a mixture of the two universal distributions, giving rise to a jet document.« less

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    Works referencing / citing this record:

    A theory of quark vs. gluon discrimination
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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.