# 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!

## Strangeness Production in U+U Collisions at STAR

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

### First floor and third floor

#### Palazzo del Casinò

Poster Thermodynamics and hadron chemistry

### Speaker

Srikanta Tripathy (Institute Of Physics, Bhubaneswar)

### Description

Strange quark production in high-energy heavy-ion collisions is a good tool in studying the properties of the deconfined phase of quarks and gluons. It is suggested that the dominant process for the production of strange quarks in the quark gluon plasma is gluonic fusion. Chemical equilibration of strange quarks, formed in such a medium, happens faster than would be the situation in hadronic scenario [1]. At similar colliding energies, U+U collisions are expected to have larger energy density [2] and higher number of produced particles than in the case of Au+Au or Pb+Pb collisions. This makes U+U system to be a unique platform for testing various observables.

We will present transverse momentum spectra of $K_s^{0}$, $\Lambda$($\bar{\Lambda}$), $\Xi$($\bar{\Xi}$) and $\Omega$($\bar{\Omega}$) in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV in the STAR experiment at RHIC. These strange particles are reconstructed from their weak decay topology via dominant hadronic decay modes using the Time Projection Chamber (TPC) detector of STAR. We will also show a comparison of the properties of these particles with PDG values and other measurements viz., particle ratios, nuclear medium effect etc. Physics implications of these results will be discussed along comparison with results from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV.

References
[1] P. Koch, B.B. Mueller and J. Rafelski, Phys. Rep.142, 167 (1986).
[2] D. Kikola, G. Odyniec and R. Vogt, Phys. Rev. C84, 054907 (2011).

Content type Experiment STAR Presenter name already specified

### Primary author

Zhenyu Ye (University of Illinois at Chicago)