Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-07-20
Nucl.Phys.A830:207c-210c,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Typos are corrected. Figures are replaced with the correct ones, and the figure captions are rewritten accordingly. 4 pages, 1
Scientific paper
10.1016/j.nuclphysa.2009.09.021
The dynamical density fluctuations around QCD critical point (CP) are analyzed using relativistic dissipative fluid dynamics, and we show that the sound mode around the QCD CP is strongly attenuated whereas the thermal fluctuation stands out there. We speculate that if possible suppression or disappearance of a Mach cone, which seems to be created by the partonic jets at RHIC, is observed as the incident energy of the heavyion collisions is decreased, it can be a signal of the existence of the QCD CP. We have presented the Israel-Stewart type fluid dynamic equations that are derived rigorously on the basis of the (dynamical) renormalization group method in the second part of the talk, which we omit here because of a lack of space.
Kunihiro Teiji
Minami Yuki
Tsumura Kyosuke
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