Suppression of $p$-wave baryons in quark recombination

We show that the observed suppression of the $\Lambda (1520)/\Lambda$ ratio in central Au+Au collisions at the BNL Relativistic Heavy Ion Collider can be naturally understood in the constituent quark recombination model.

Figure 1

Suppression factor for the formation of a $p$-wave baryon by recombination of three quarks from a thermal medium, as a function of the hadron size parameter $b$ for four different choices of coherence length $R$ of the initial-state quarks ($R/b=1,1.5,2,{10}^4$). Temperature $T=160$ MeV; $\mathit{ud}$-quark mass $m=330$ MeV; hadronization surface thickness $a=0.5$ fm.