# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Collision Energy and Centrality Dependence of Light Nuclei (Triton) Production at RHIC with the STAR Experiment

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### Speaker

Mr Dingwei Zhang (Central China Normal University)

### Description

In high-energy nuclear collisions, light nuclei provide a unique tool to explore the QCD phase structure. The production of light nuclei is sensitive to the temperature and phase-space density of the system at freeze-out. In addition, phase transition will lead to large baryon density fluctuations, which will be reflected in the light nuclei production. For example, the ratio of proton ($N(p)$) and triton ($N(t)$) to deuteron ($N(d)$) yields, which is defined as $N(t)\cdot$N(p)/$N^{2}(d)$ , may be used as a sensitive observable to search for the QCD critical point [1].

In this poster, we will report the first results of the collision energy and centrality dependence of triton production in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV, measured by the STAR experiment at RHIC. We will present the beam energy dependence of the coalescence parameter $B_3(t)$, directed flow ($v_1$) of light nuclei (d, t, ${}^3$He), and the yield ratio $N(t)\cdot$N(p)/$N^2(d)$. We will also show the energy dependence. Their physics implications will be discussed.

Reference
[1] K.J. Sun, L.W. Chen, C.M. Ko and Z.B. Xu, Phys. Lett. B 774, 103 (2017), arXiv:1702.07620.

Content type Experiment STAR Presenter name already specified

### Primary author

Zhenyu Ye (University of Illinois at Chicago)