Jet Topics: Disentangling Quarks and Gluons at Colliders
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PhysRevLett.120.241602.pdf
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453.07 KB
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Adobe PDF
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Author(s)
Metodiev, Eric Mario
Thaler, Jesse
Date Issued
June 2018
Journal
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.120.241602
