TY - JOUR
T1 - Particle ratios and the QCD critical temperature
AU - Noronha-Hostler, J.
AU - Noronha, Jorge
AU - Greiner, Carsten
PY - 2010/9/8
Y1 - 2010/9/8
N2 - We show how the measured particle ratios at RHIC can be used to provide nontrivial information about the critical temperature of the QCD phase transition. This is obtained by including the effects of highlymassive Hagedorn resonances on statistical models, which are used to describe hadronic yields. Hagedorn states are relevantly close to Tc and have been shown to decrease η/s to the KSS limit and allow for quick chemical equilibrium times in dynamical calculations of hadrons. The inclusion of Hagedorn states creates a dependence of the thermal fits on the Hagedorn temperature, TH, which is assumed to be equal to Tc, and leads to an overall improvement of thermal fits. We find that for Au+Au collisions at RHIC at √sNN = 200 GeV the best square fit measure, χ2, occurs at Tc ∼ 176 MeV and produces a chemical freeze-out temperature of 170.4 MeV and a baryon chemical potential of 27.8 MeV.
AB - We show how the measured particle ratios at RHIC can be used to provide nontrivial information about the critical temperature of the QCD phase transition. This is obtained by including the effects of highlymassive Hagedorn resonances on statistical models, which are used to describe hadronic yields. Hagedorn states are relevantly close to Tc and have been shown to decrease η/s to the KSS limit and allow for quick chemical equilibrium times in dynamical calculations of hadrons. The inclusion of Hagedorn states creates a dependence of the thermal fits on the Hagedorn temperature, TH, which is assumed to be equal to Tc, and leads to an overall improvement of thermal fits. We find that for Au+Au collisions at RHIC at √sNN = 200 GeV the best square fit measure, χ2, occurs at Tc ∼ 176 MeV and produces a chemical freeze-out temperature of 170.4 MeV and a baryon chemical potential of 27.8 MeV.
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U2 - 10.1088/0954-3899/37/9/094062
DO - 10.1088/0954-3899/37/9/094062
M3 - Article
AN - SCOPUS:77956424739
SN - 0954-3899
VL - 37
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
IS - 9
M1 - 094062
ER -