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Photon-tagged measurements of jet quenching with ATLAS

Events containing a high transverse momentum ($p_\mathrm{T}$) prompt photon offer a useful tool 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 moment...

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Autor principal: Perepelitsa, Dennis
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2018.09.056
http://cds.cern.ch/record/2634090
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author Perepelitsa, Dennis
author_facet Perepelitsa, Dennis
author_sort Perepelitsa, Dennis
collection CERN
description Events containing a high transverse momentum ($p_\mathrm{T}$) prompt photon offer a useful tool 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 associated hard-scattered parton before it begins to shower and become quenched. In particular, the presence of a high-$p_\mathrm{T}$ photon can be used to select $pp$ and Pb+Pb events with the same configuration before quenching, limiting the effects of selection biases present in other jet measurements. The large statistics $pp$ and Pb+Pb data delivered by the LHC in 2015 thus 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 proceedings, photon-tagged measurements of jet quenching by ATLAS are reported.
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spelling cern-26340902022-02-02T19:29:27Zdoi:10.1016/j.nuclphysa.2018.09.056http://cds.cern.ch/record/2634090engPerepelitsa, DennisPhoton-tagged measurements of jet quenching with ATLASParticle Physics - ExperimentEvents containing a high transverse momentum ($p_\mathrm{T}$) prompt photon offer a useful tool 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 associated hard-scattered parton before it begins to shower and become quenched. In particular, the presence of a high-$p_\mathrm{T}$ photon can be used to select $pp$ and Pb+Pb events with the same configuration before quenching, limiting the effects of selection biases present in other jet measurements. The large statistics $pp$ and Pb+Pb data delivered by the LHC in 2015 thus 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 proceedings, photon-tagged measurements of jet quenching by ATLAS are reported.ATL-PHYS-PROC-2018-085oai:cds.cern.ch:26340902018-08-14
spellingShingle Particle Physics - Experiment
Perepelitsa, Dennis
Photon-tagged measurements of jet quenching with ATLAS
title Photon-tagged measurements of jet quenching with ATLAS
title_full Photon-tagged measurements of jet quenching with ATLAS
title_fullStr Photon-tagged measurements of jet quenching with ATLAS
title_full_unstemmed Photon-tagged measurements of jet quenching with ATLAS
title_short Photon-tagged measurements of jet quenching with ATLAS
title_sort photon-tagged measurements of jet quenching with atlas
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.nuclphysa.2018.09.056
http://cds.cern.ch/record/2634090
work_keys_str_mv AT perepelitsadennis photontaggedmeasurementsofjetquenchingwithatlas