2011/01/31 by M. Csanád, Mate Csanad, Imre Majer +1 · 10 citations
Physics and Astronomy · #Distribution (mathematics) #Equation of state #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Momentum (technical analysis) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark–gluon plasma #Relativistic Heavy Ion Collider #Spectral line #State of matter #Strange matter #nucl-th
paper · pdf · doi:10.1134/s1547477111090147
published in Physics of Particles and Nuclei Letters 8(9), 1013-1015 (Pleiades Publishing) · Talk at the VI Workshop on Particle Correlations and Femtoscopy, Kiev, September 14-18, 2010. 6 pages, 1 figure. This work was supported by the OTKA grant NK73143 and M. Csanad's Bolyai scholarship
arxiv created 2011/09/04 · openalex publication_date 2011/12/01 · openalex created_date 2016/06/24 · arxiv updated 2016/10/25 · openalex updated_date 2026/08/05
The time evolution of the quark gluon plasma created in gold-gold collisions of the Relativistic Heavy Ion Collider (RHIC) can be described by hydro-dynamical models. Distribution of hadrons reflects the freeze-out state of the matter. To investigate the time evolution one needs to analyze penetrating probes, such as direct photon spectra. Distributions of low energy photons was published in 2010 by PHENIX. In this paper we analyze a 3 + 1 dimensional solution of relativistic hydrodynamics and calculate momentum distribution of direct photons. Using earlier fits of this model to hadronic spectra, we compare photon calculations to measurements and find that the initial temperature of the center of the fireball is at least 519 ± 12 MeV, while for the equation of state we get c s = 0.36 ± 0.02.