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Title: Production of photons in relativistic heavy-ion collisions

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [2];  [2]
  1. McGill Univ., Montreal, QC (Canada); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. McGill Univ., Montreal, QC (Canada)
  3. Univ. de Santiago de Compostela, Santiago de Compostela (Galicia-Spain); Univ. de Sao Paulo, Sao Paul (Brazil)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)

In this work it is shown that the use of a hydrodynamical model of heavy-ion collisions which incorporates recent developments, together with updated photon emission rates, greatly improves agreement with both ALICE and PHENIX measurements of direct photons, supporting the idea that thermal photons are the dominant source of direct photon momentum anisotropy. The event-by-event hydrodynamical model uses the impact parameter dependent Glasma model (IP-Glasma) initial states and includes, for the first time, both shear and bulk viscosities, along with second-order couplings between the two viscosities. Furthermore, the effect of both shear and bulk viscosities on the photon rates is studied, and those transport coefficients are shown to have measurable consequences on the photon momentum anisotropy.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC00112704; SC0012704; AC02-05CH11231
OSTI ID:
1295210
Alternate ID(s):
OSTI ID: 1247905
Report Number(s):
BNL-112400-2016-JA
Journal Information:
Physical Review C, Vol. 93, Issue 4; ISSN 2469-9985
Publisher:
APSCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 160 works
Citation information provided by
Web of Science

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Fluctuating Glasma initial conditions and flow in heavy ion collisions text January 2012
Event-by-event anisotropic flow in heavy-ion collisions from combined Yang-Mills and viscous fluid dynamics text January 2012
Measurement of Direct-Photon Elliptic Flow in Pb-Pb Collisions at sqrt(NN) = 2.76 TeV text January 2012
Collective flow and viscosity in relativistic heavy-ion collisions text January 2013
Hydrodynamic Modeling of Heavy-Ion Collisions text January 2013
Next-to-leading order thermal photon production in a weakly coupled quark-gluon plasma text January 2013
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On the role of magnetic field in photon excess in heavy ion collisions text January 2014
The importance of the bulk viscosity of QCD in ultrarelativistic heavy-ion collisions text January 2015
Hadronic and partonic sources of direct photons in relativistic heavy-ion collisions text January 2015
Photon Emission from Quark-Gluon Plasma: Complete Leading Order Results text January 2001
Inclusive Jet Production, Parton Distributions, and the Search for New Physics text January 2003
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Hadronic Production of Thermal Photons text January 2003
A new critical study of photon production in hadronic collisions text January 2006
Rho properties in a hot meson gas text January 1999
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Collectivity and electromagnetic radiation in small systems text January 2016
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Longitudinal Dynamics of High Baryon Density Matter in High Energy Heavy-Ion Collisions text January 2018
Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions text January 2019
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