Impact of early stage non-equilibrium dynamics on photon production in relativistic heavy ion collisions

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Oliva, L.^1,2 ; Ruggieri, M.^3 ; Plumari, S.^1,2 ; Scardina, F.^1,2 ; Greco, V.^1,2

Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, Catania

95123, Italy^1

INFN, Laboratori Nazionali Del Sud, Via S. Sofia 62, Catania

95123, Italy^2

College of Physics, University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing

100049, China^3

关键词: Boltzmann transport equation;    Heavy ion collision;    Initial conditions;    Non-equilibrium dynamics;    Quark-gluon plasma;    Relativistic heavy ion collision;    Relativistic kinetics;    Space-time evolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012038/pdf
DOI  :  10.1088/1742-6596/832/1/012038

来源: IOP

【 摘 要 】

In this study we discuss our results on the spectrum of photons emitted from the quark-gluon plasma produced in heavy ion collisions at RHIC energies. Simulating the space-time evolution of the fireball by solving the relativistic Boltzmann transport equation and including two-particle scattering processes with photon emission allows us to make a first step in the description of thermal photons from the QGP as well as of those produced in the pre-equilibrium stage. Indeed, we consider not only a standard Glauber initial condition but also a model in which quarks and gluons are produced in the very early stage through the Schwinger mechanism by the decay of an initial color-electric field. In the latter approach relativistic kinetic equations are coupled in a self-consistent way to field equations. We aim at spotting the impact of early stage non-equilibrium dynamics on the photon production.