Production of photons in relativistic heavy-ion collisions

By J. Paquet, Chun Shen, G. Denicol, M. Luzum, B. Schenke, Sangyong Jeon, Charles Gale. 2015

237 citations recorded by the source corpus.

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. 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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/deaa86dcbb8868f93fb8b18096d871f3b361ac9b

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In Nuclear and High Energy Physics

1. P. Braun-Munzinger
2. J. Stachel
3. A. Andronic
4. K. Redlich
5. Michele Floris
6. R. Bellwied
7. R. Reed
8. S. Rasanen

Citations in the corpus

• Direct photon production in Pb-Pb collisions at $\sqrt{s_\rm{NN}}$ = 2.76 TeV (2015, methodology): “[59] uses event-by-event (2+1D) longitudin ally boost invariant viscous hydrodynamics [70] with IP-Glasma initial conditions [71].”