Factorization of Jet Cross Sections in Heavy-Ion Collisions
Journal
Physical Review Letters
Journal Volume
122
Journal Issue
25
Date Issued
2019
Author(s)
Abstract
We propose a new phenomenological approach to establish QCD factorization of jet cross sections in the heavy-ion environment. Starting from a factorization formalism in proton-proton collisions, we introduce medium modified jet functions to capture the leading interaction of jets with the hot and dense QCD medium. A global analysis using a Monte Carlo sampling approach is performed in order to reliably determine the new jet functions from the nuclear modification factor of inclusive jets at the LHC. We find that gluon jets are significantly more suppressed due to the presence of the medium than quark jets. In addition, we observe that the jet radius dependence is directly related to the relative suppression of quark and gluon jets. Our approach may help to improve the extraction of medium properties from data. ? 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the ?https://creativecommons.org/licenses/by/4.0/? Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Subjects
Colliding beam accelerators; Factorization; Monte Carlo methods; Global analysis; Heavy ion collision; Ion environment; Monte Carlo sampling; Nuclear modification factors; Phenomenological approach; Proton proton collisions; QCD factorization; Heavy ions
Type
journal article