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Title: Photon-tagged measurements of jet quenching with ATLAS

Abstract

Events containing a high transverse momentum (p T) prompt photon offer a useful way to study the dynamics of the hot, dense medium produced in heavy ion collisions. Because photons do not carry color charge, they are unaffected by the medium, and thus provide information about the momentum, direction, and flavor (quark or gluon) of the asso- ciated hard-scattered parton before it begins to shower and become quenched. In particular, the presence of a high-p T photon can be used to select pp and Pb+Pb events with the same configuration before quenching, limiting the effects of quenching-induced selection biases present in other jet measurements. Furthermore the large statistics pp and Pb+Pb data delivered by the LHC in 2015 allow for a detailed study of photon-tagged jet quenching effects, such as the overall parton energy loss and modified structure of the component of the shower which remains correlated with the initial parton direction (e.g. in cone). In this proceeding, photon-tagged measurements of jet quenching by ATLAS are reported.

Authors:
ORCiD logo [1]
  1. Univ. of Colorado Boulder, Boulder, CO (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1503108
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 982; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; heavy ion collisions; quark-gluon plasma; parton energy loss; jet quenching; jet fragmentation

Citation Formats

Perepelitsa, Dennis V. Photon-tagged measurements of jet quenching with ATLAS. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysa.2018.09.056.
Perepelitsa, Dennis V. Photon-tagged measurements of jet quenching with ATLAS. United States. doi:10.1016/j.nuclphysa.2018.09.056.
Perepelitsa, Dennis V. Tue . "Photon-tagged measurements of jet quenching with ATLAS". United States. doi:10.1016/j.nuclphysa.2018.09.056. https://www.osti.gov/servlets/purl/1503108.
@article{osti_1503108,
title = {Photon-tagged measurements of jet quenching with ATLAS},
author = {Perepelitsa, Dennis V.},
abstractNote = {Events containing a high transverse momentum (pT) prompt photon offer a useful way to study the dynamics of the hot, dense medium produced in heavy ion collisions. Because photons do not carry color charge, they are unaffected by the medium, and thus provide information about the momentum, direction, and flavor (quark or gluon) of the asso- ciated hard-scattered parton before it begins to shower and become quenched. In particular, the presence of a high-pT photon can be used to select pp and Pb+Pb events with the same configuration before quenching, limiting the effects of quenching-induced selection biases present in other jet measurements. Furthermore the large statistics pp and Pb+Pb data delivered by the LHC in 2015 allow for a detailed study of photon-tagged jet quenching effects, such as the overall parton energy loss and modified structure of the component of the shower which remains correlated with the initial parton direction (e.g. in cone). In this proceeding, photon-tagged measurements of jet quenching by ATLAS are reported.},
doi = {10.1016/j.nuclphysa.2018.09.056},
journal = {Nuclear Physics. A},
issn = {0375-9474},
number = C,
volume = 982,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Measurements in pp collisions of the photon–jet pT balance (left, from Ref. [1]) and photon-tagged jet FF in (right, from Ref. [2]), compared with the analogous distributions in event generators.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.