1303.1231 (Jun Song et al.)

Baryon-antibaryon production asymmetry in relativistic heavy ion
collisions    [PDF]

Jun Song, Feng-lan Shao

We study the asymmetry between the yield of baryons and that of antibaryons in relativistic heavy ion collisions in quark combination model. Based on basic features of quark combination, we obtain yields of baryons, antibaryons and mesons as functions of the numbers of constituent quarks and antiquarks just before hadronization. In particular, we study effects of quark-antiquark asymmetry on the ratio of (anti-)baryons to mesons and that of antibaryons to baryons. The universal correlation between $\bar{p}/p$ and $K^{-}/K^{+}$ yield ratios observed in heavy ion collisions at energies ranging from SPS to LHC is explained.

View original: http://arxiv.org/abs/1303.1231