Speaker
Dr
Xionghong He
(中国科学院近代物理研究所)
Description
The study of the collectivity of light nuclei in heavy-ion collisions, which will reflect
their production mechanism and the underlying collision dynamics, is of
particular interest for both theoretical and experimental
efforts[1].
Comprehensive measurements of light nuclei anisotropy $v_1$ and $v_2$ provide
valuable information on the nucleon coalescence and will lead to a better understanding of light nuclei production mechanism in such collisions.
Particularly, in the collision energy regime of a few GeV, the relatively
long passing time of the colliding two nuclei naturally leads to cross-talk between the spectator fragments
and the fireball. The light nuclei flow pattern may be strongly affected by
the spectator fragments.
In this talk, we will present high statistics measurements of $v_1$ and $v_2$ for
deuterons, tritons, $^3$He, and $^4$He in Au+Au collisions at 3 GeV collected by the
STAR experiment with the fixed target mode at RHIC.
The particle rapidity and transverse momentum dependence of $v_1$ and $v_2$
for these particles will
be presented. These results will also be discussed within the framework of
nucleon coalescence and compared with available model calculations.
[1] Peter Braun-Munzinger and Benjamin Dönigus, Nuclear Physics A,
987, 144 (2019).
Primary author
Dr
Xionghong He
(中国科学院近代物理研究所)
