A tale of tails: Photon rates and flow in ultra-relativistic heavy ion collisions

McLerran, Larry; Schenke, Björn

doi:10.1016/j.nuclphysa.2015.11.008

Title: A tale of tails: Photon rates and flow in ultra-relativistic heavy ion collisions

Journal Article · Mon Feb 01 00:00:00 EST 2016 · Nuclear Physics. A

DOI:https://doi.org/10.1016/j.nuclphysa.2015.11.008· OSTI ID:1246808

McLerran, Larry; Schenke, Björn

We consider the possibility that quark and gluon distributions in the medium created in high energy heavy ion collisions may be modified by a power law tail at energies much higher than the temperature. We parametrize such a tail by Tsallis distributions with an exponent motivated by phenomenology. These distributions are characterized by an effective temperature scale that we assume to evolve in time like the temperature for thermal distributions. We find that including such a tail increases the rates for photon production and significantly delays the emission times for photons of a fixed energy. Finally, we argue that these effects should modify photon yields and flow patterns in a way that will help the agreement of theoretical calculations with data from LHC and RHIC experiments.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC00112704; SC0012704

OSTI ID:: 1246808

Alternate ID(s):: OSTI ID: 1359696

Report Number(s):: BNL-112001-2016-JA; R&D Project: 08870; KB0301020

Journal Information:: Nuclear Physics. A, Vol. 946, Issue C; ISSN 0375-9474

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 26 works

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Cited By (7)

Comparison of Tsallis statistics with the Tsallis-factorized statistics in the ultrarelativistic pp collisions Parvan, A. S. The European Physical Journal A, Vol. 52, Issue 12 https://doi.org/10.1140/epja/i2016-16355-y	journal	December 2016
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Prompt photon yield and elliptic flow from gluon fusion induced by magnetic fields in relativistic heavy-ion collisions Ayala, Alejandro; Castaño-Yepes, Jorge David; Dominguez, C. A. Physical Review D, Vol. 96, Issue 1 https://doi.org/10.1103/physrevd.96.014023	journal	July 2017
The production of photons in relativistic heavy-ion collisions Paquet, Jean-François; Shen, Chun; Denicol, Gabriel S. arXiv https://doi.org/10.48550/arxiv.1509.06738	text	January 2015
Holography for Heavy Ions Collisions at LHC and NICA Aref'eva, I. Ya. arXiv https://doi.org/10.48550/arxiv.1612.08928	text	January 2016
Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions Adare, A.; Afanasiev, S.; Aidala, C. arXiv https://doi.org/10.48550/arxiv.1805.04084	text	January 2018
Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions Schäfer, Anna; Torres-Rincon, Juan M.; Rothermel, Jonas arXiv https://doi.org/10.48550/arxiv.1902.07564	text	January 2019

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