Abstract
The time evolution of both proton and anti-proton v 2 flows from Au+Au collisions at \(\sqrt {{S_{NN}}} = 7.7\) GeV are examined by using both pure cascade and mean-field potential versions of the UrQMD model. Due to a stronger repulsion at the early stage introduced by the repulsive potentials and hence much less annihilation probabilities, anti-protons are frozen out earlier with smaller v 2 values. Therefore, the experimental data of anti-proton v 2 as well as the flow difference between proton and anti-proton can be reasonably described with the potential version of UrQMD.
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Li, Q., Wang, Y., Wang, X. et al. An explanation of the elliptic flow difference between proton and anti-proton from the UrQMD model with hadron potentials. Sci. China Phys. Mech. Astron. 59, 632001 (2016). https://doi.org/10.1007/s11433-015-5774-4
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DOI: https://doi.org/10.1007/s11433-015-5774-4