# Charmed hadron production at low transverse momentum in Au Au collisions at RHIC - Nuclear Experiment

Abstract: We report measurements of charmed hadron production from hadronic$D^{0} ightarrow K\pi$ and semileptonic $\mu$ and $e$ decays in 200 GeVAu+Au collisions at RHIC. Analysis of the spectra indicates that charmedhadrons have a different radial flow pattern from light or multi-strangehadrons. Charm cross sections at mid-rapidity are extracted by combining thethree independent measurements, covering the transverse momentum range thatcontributes to $\sim$90% of the integrated cross section. The cross sectionsscale with number of binary collisions of the initial nucleons, a signature ofcharm production exclusively at the initial impact of colliding heavy ions. Theimplications for charm quark interaction and thermalization in the stronglyinteracting matter are discussed.

Author: B. I. Abelev for the STAR Collaboration

Source: https://arxiv.org/