Charmed hadron production via equal-velocity quark combination in ultra-relativistic heavy ion collisions

Abstract

Recent data on the production of $D$ mesons and ${\Lambda }_c^{+}$ baryons in heavy ion collisions at the Relativistic Heavy Ion Collider and the Large Hadron Collider exhibit a number of striking characteristics such as enhanced yield ratios $D_s^{+}/D^0$, ${\Lambda }_c^{+}/D^0$ and their transverse momentum dependences. In this paper, we derive the momentum dependence of open charm mesons and singly charmed baryons produced in ultra-relativistic heavy ion collisions via the equal-velocity quark combination. We present analytic expressions and numerical results of yield ratios and compare them with the experimental data available. We make predictions for other charmed hadrons.

Comments: 2 tables, 8 figures