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Title: Sorting Out Quenched Jets

Abstract

We introduce a new “quantile” analysis strategy to study the modification of jets as they traverse through a droplet of quark-gluon plasma. To date, most jet modification studies have been based on comparing the jet properties measured in heavy-ion collisions to a proton-proton baseline at the same reconstructed jet transverse momentum ( p T ). It is well known, however, that the quenching of jets from their interaction with the medium leads to a migration of jets from higher to lower p T , making it challenging to directly infer the degree and mechanism of jet energy loss. Our proposed quantile matching procedure is inspired by (but not reliant on) the approximate monotonicity of energy loss in the jet p T . In this strategy, jets in heavy-ion collisions ordered by p T are viewed as modified versions of the same number of highest-energy jets in proton-proton collisions, and the fractional energy loss as a function of jet p T is a natural observable ( Q A A ). Furthermore, despite nonmonotonic fluctuations in the energy loss, we use an event generator to validate the strong correlation between the p T of the parton that initiates a heavy-ion jet and the p T of the vacuum jet which corresponds to it via the quantile procedure ( p T quant ). We demonstrate that this strategy both provides a complementary way to study jet modification and mitigates the effect of p T migration in heavy-ion collisions.

Authors:
; ;
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP); Simons Foundation
OSTI Identifier:
1524472
Alternate Identifier(s):
OSTI ID: 1630637
Grant/Contract Number:  
SC0012567; SC0011090
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 122 Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Brewer, Jasmine, Milhano, José Guilherme, and Thaler, Jesse. Sorting Out Quenched Jets. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevLett.122.222301.
Brewer, Jasmine, Milhano, José Guilherme, & Thaler, Jesse. Sorting Out Quenched Jets. United States. https://doi.org/10.1103/PhysRevLett.122.222301
Brewer, Jasmine, Milhano, José Guilherme, and Thaler, Jesse. Sat . "Sorting Out Quenched Jets". United States. https://doi.org/10.1103/PhysRevLett.122.222301.
@article{osti_1524472,
title = {Sorting Out Quenched Jets},
author = {Brewer, Jasmine and Milhano, José Guilherme and Thaler, Jesse},
abstractNote = {We introduce a new “quantile” analysis strategy to study the modification of jets as they traverse through a droplet of quark-gluon plasma. To date, most jet modification studies have been based on comparing the jet properties measured in heavy-ion collisions to a proton-proton baseline at the same reconstructed jet transverse momentum (pT). It is well known, however, that the quenching of jets from their interaction with the medium leads to a migration of jets from higher to lower pT, making it challenging to directly infer the degree and mechanism of jet energy loss. Our proposed quantile matching procedure is inspired by (but not reliant on) the approximate monotonicity of energy loss in the jet pT. In this strategy, jets in heavy-ion collisions ordered by pT are viewed as modified versions of the same number of highest-energy jets in proton-proton collisions, and the fractional energy loss as a function of jet pT is a natural observable (QAA). Furthermore, despite nonmonotonic fluctuations in the energy loss, we use an event generator to validate the strong correlation between the pT of the parton that initiates a heavy-ion jet and the pT of the vacuum jet which corresponds to it via the quantile procedure (pTquant). We demonstrate that this strategy both provides a complementary way to study jet modification and mitigates the effect of pT migration in heavy-ion collisions.},
doi = {10.1103/PhysRevLett.122.222301},
journal = {Physical Review Letters},
number = 22,
volume = 122,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.122.222301

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Cited by: 1 work
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