Abstract:
The presence of a critical point in the QCD phase diagram can deform the trajectories describing the evolution of the expanding fireball in the μB - T phase diagram. The deformation of the hydrodynamic trajectories will change the transverse velocity (βT) dependence of the proton-antiproton ratio when the fireball passes in the vicinity of the critical point. An unusual βT dependence of the over(p, -) / p ratio in a narrow beam energy window would thus signal the presence of the critical point. © 2009.
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