Speaker
Vanek Jan
(Nuclear Physics Institute, Czech Academy of Sciences)
Description
Charm quarks are primarily produced at early stages of ultra-relativistic heavy-ion collisions and can therefore probe the Quark-Gluon Plasma (QGP) throughout its whole evolution. Final-state open-charm hadrons are commonly used to experimentally study the charm quark interaction with the QGP. Thanks to the precise secondary vertex reconstruction provided by the Heavy Flavor Tracker (HFT), STAR is able to directly reconstruct D$^\pm$, D$^0$, D$_\textrm{s}$, and $\Lambda_\textrm{c}^\pm$ via their hadronic decay channels. Moreover, the topological cuts for signal extraction are optimized using supervised machine learning techniques. In this talk, we will present an overview of recent open charm results from the STAR experiment. In particular, the nuclear modification factors of open-charm mesons, D$_\textrm{s}$/D$^0$ and $\Lambda_\textrm{c}^\pm$/D$^0$ ratios as functions of transverse momentum and collision centrality will be discussed together with their physics implications.
Primary author
Vanek Jan
(Nuclear Physics Institute, Czech Academy of Sciences)
