Signature of QCD critical point: Anomalous transverse velocity dependence of antiproton-proton ratio

Details Signature of QCD critical point: Anomalous transverse velocity dependence of antiproton-proton ratio Signature of QCD critical point: Anomalous transverse velocity dependence of antiproton-proton ratio

2009-02-27

arxiv.org/abs/0903.0024v1

Phys.Lett.B673:268-271,2009

Physics

Nuclear Physics

Nuclear Theory

5 pages, 6 figures; To be published on Physics Letters B

Scientific paper

10.1016/j.physletb.2009.02.044

We formulate the QCD critical point focusing effect on transverse velocity ($\beta_{t}$) dependence of antiproton to proton ($\bar{p}/p$) ratio, which was recently proposed by Asakawa {\it et al.} as an experimental signature of QCD critical point in high energy heavy ion collisions (HICs). For quantitative analysis, Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport model and THERMal heavy-IoN generATOR (THERMINATOR) are applied to calculate the corresponding $\beta_{t}$ dependence of $\bar{p}/p$ ratio for three gedanken focused isentropic trajectories with different focusing degree on QCD phase diagram. Finally, we obtained an observable anomaly in $\beta_{t}$ dependence of $\bar{p}/p$ ratio, which can be employed as a signature of QCD critical point.

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