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.
Categories: nucl-th hep-ph nucl-ex