Speaker
Shaoqiu Fan
(Central China Normal University)
Description
Rapidity-odd component of directed flow ($v_{1}$) measurement at various beam energy gives a new insight on the properties of the medium created in heavy-ion collisions. Both hydrodynamic and nuclear transport models indicate that $v_{1}$(y) is sensitive to the details of expansion during the early stages of collision fireball. In this poster, we will present directed flow ($v_{1}$) as a function of rapidity of identified particles ($\pi^{+}$, $\pi^{-}$, $K^{+}$, $K^{+}$, $p$ and $\bar{p}$) at 54.4 GeV in Au+Au collisions at RHIC-STAR. The $v_{1}$(y) slope will be discussed and compared with results from Beam Energy Scan I.
