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Title: Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions

Abstract

The strong suppression of high-pT jets in heavy ion collisions is a result of elastic and inelastic energy loss suffered by the jet multi-prong collection of color charges that are resolved by medium interactions. Hence, quenching effects depend on the fluctuations of the jet substructure that are probed by the cone size dependence of the spectrum. In this letter, we present the first complete, analytic calculation of the inclusive R-dependent jet spectrum in PbPb collisions at LHC energies, including resummation of energy loss effects from hard, vacuum-like emissions occurring in the medium and modeling of soft energy flow and recovery at the jet cone. Both the geometry of the collision and the local medium properties, such as the temperature and fluid velocity, are given by a hydrodynamic evolution of the medium, leaving only the coupling constant in the medium as a free parameter. The calculation yields a good description of the centrality and pT dependence of jet suppression for R = 0.4 together with a mild cone size dependence, which is in agreement with recent experimental results. Gauging the theoretical uncertainties, we find that the largest sensitivity resides in the leading logarithmic approximation of the phase space of resolved splittings,more » which can be improved systematically, while non-perturbative modeling of the soft-gluon sector is of relatively minor importance up to large cone sizes« less

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1836394
Alternate Identifier(s):
OSTI ID: 1835711
Report Number(s):
BNL-222475-2021-JAAM
Journal ID: ISSN 0031-9007; PRLTAO; 252301
Grant/Contract Number:  
SC0012704
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 127 Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Jets & heavy flavor physics; Relativistic heavy-ion collisions

Citation Formats

Mehtar-Tani, Yacine, Pablos, Daniel, and Tywoniuk, Konrad. Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions. United States: N. p., 2021. Web. doi:10.1103/PhysRevLett.127.252301.
Mehtar-Tani, Yacine, Pablos, Daniel, & Tywoniuk, Konrad. Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions. United States. https://doi.org/10.1103/PhysRevLett.127.252301
Mehtar-Tani, Yacine, Pablos, Daniel, and Tywoniuk, Konrad. Fri . "Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions". United States. https://doi.org/10.1103/PhysRevLett.127.252301.
@article{osti_1836394,
title = {Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions},
author = {Mehtar-Tani, Yacine and Pablos, Daniel and Tywoniuk, Konrad},
abstractNote = {The strong suppression of high-pT jets in heavy ion collisions is a result of elastic and inelastic energy loss suffered by the jet multi-prong collection of color charges that are resolved by medium interactions. Hence, quenching effects depend on the fluctuations of the jet substructure that are probed by the cone size dependence of the spectrum. In this letter, we present the first complete, analytic calculation of the inclusive R-dependent jet spectrum in PbPb collisions at LHC energies, including resummation of energy loss effects from hard, vacuum-like emissions occurring in the medium and modeling of soft energy flow and recovery at the jet cone. Both the geometry of the collision and the local medium properties, such as the temperature and fluid velocity, are given by a hydrodynamic evolution of the medium, leaving only the coupling constant in the medium as a free parameter. The calculation yields a good description of the centrality and pT dependence of jet suppression for R = 0.4 together with a mild cone size dependence, which is in agreement with recent experimental results. Gauging the theoretical uncertainties, we find that the largest sensitivity resides in the leading logarithmic approximation of the phase space of resolved splittings, which can be improved systematically, while non-perturbative modeling of the soft-gluon sector is of relatively minor importance up to large cone sizes},
doi = {10.1103/PhysRevLett.127.252301},
journal = {Physical Review Letters},
number = 25,
volume = 127,
place = {United States},
year = {Fri Dec 17 00:00:00 EST 2021},
month = {Fri Dec 17 00:00:00 EST 2021}
}

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