Speaker
Nasim Md
(Uiniversity of california, Los Angeles)
Description
Heavy quarks are considered as an excellent probe for the
early dynamics in heavy-ion collisions. Among all open charm
mesons, $D_{s}^{+}(c\bar s)$ and $D_{s}^{-}(\bar c s)$ mesons play a unique role to quantify
heavy quark diffusion and hadronization in heavy-ion collisions, because of their valence quark compositions. Also, like multi-strange hadrons, $D_{s}^{\pm}$ mesons are expected to freeze out early and have smaller hadronic interaction cross-section
compared with other $D$ mesons. Therefore, the elliptic flow ($v_{2}$) of
$D_{s}^{\pm}$ is considered to be a better measure of the partonic
contribution to the charm hadron $v_{2}$ than that of $D^{0}$ or
$D^{\pm}$. The new Heavy Flavor Tracker detector,
which has been installed recently in the STAR experiment,
provides a unique opportunity to reconstruct
$D_{s}^{\pm}$ via displaced vertices at RHIC at $\sqrt{s_{NN}}$ =200 GeV.
We will present the first measurement of the nuclear modification
factor $R_{CP}$ and $v_{2}$ of $D_{s}^{\pm}$ in Au+Au
collisions at $\sqrt{s_{NN}}$ = 200 GeV.
These results will be compared
with those of other open charm mesons and strange mesons to determine
how the (possibly) strangeness equilibrated partonic
matter affects the $D_{s}^{\pm}$ meson production. They will also be compared with
measurements at the LHC energy to study the energy
dependence of the
above mentioned phenomena.
| On behalf of collaboration: | STAR |
|---|
Primary author
Nasim Md
(Uiniversity of california, Los Angeles)
