The 13th Workshop on QCD Phase Transition and Relativistic Heavy-Ion Physics (QPT 2019)

Beam energy dependence of directed flow of deuteron in Au+Au collisions at RHIC

Not scheduled

15m

Hualongcheng Hotel

Speaker

Mr Xionghong He (Institute of Modern Physics, CAS)

Summary

The directed flow v1 is considered to be sensitive to the equation of state (EoS) of QCD matter in heavy ion collisions.
From the measurement by STAR experiment at RHIC, the v1 slope (dv1/dy) distribution of net-proton as well as net-Lambda has
shown a minimum at 14.5GeV, implying the softening of EOS. In RHIC beam energy scan, abundant of light nuclei are produced
especially at the lower collision energies. Due to heavier mass, light nuclei v1 may have more sensitivity on collision energy and EoS.

In this talk, we will present the direct flow v1 of deuterons from Au+Au collisions at 7.7, 11.5, 14.5, 19.6, 27 and 39 GeV measured with
the STAR experiment at RHIC. The deuteron v1 rapidity slope (dv1/dy) from mid-central collisions (10-40%) are extracted. Results of
the collision energy dependence will be presented and discussed by comparing with model calculations