Jet Topics: Disentangling Quarks and Gluons at Colliders
Author(s)
Metodiev, Eric Mario; Thaler, Jesse
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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.
Date issued
2018-06Department
Massachusetts Institute of Technology. Center for Theoretical PhysicsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Metodiev, Eric M. and Jesse Thaler et al. "Jet Topics: Disentangling Quarks and Gluons at Colliders." Physical Review Letters 120, 24 (June 2018): 241602
Version: Final published version
ISSN
0031-9007
1079-7114