\Lambda_{c} enhancement from strongly coupled quark-gluon plasma

TL;DR

This paper suggests that the production of bc in heavy ion collisions can be significantly enhanced due to diquark correlations in the strongly coupled quark-gluon plasma, serving as a novel QGP signal.

Contribution

It introduces the idea that diquark states in the strongly coupled QGP can lead to increased bc production, a new potential signature of QGP.

Findings

bc/bd ratio is substantially enhanced.

Diquark correlations increase bc yield in coalescence model.

Proposes bc enhancement as a QGP signal.

Abstract

We propose the enhancement of $\Lambda_{c}$ as a novel QGP signal in heavy ion collisions at RHIC and LHC. Assuming a stable bound diquark state in the strongly coupled QGP near the critical temperature, we argue that the direct two-body collision between a $c$ quark and a $[ud]$ diquark would lead to an enhanced $\Lambda_{c}$ production in comparison with the normal three-body collision among independent $c$, $u$ and $d$ quarks. In the coalescence model, we find that the $\Lambda_{c}/D$ yield ratio is enhanced substantially due to the diquark correlation.