Strangeness in Quark Matter 2022 (SQM 2022)

Baryon number transport, strangeness conservation and $\Omega$-hadron correlations

14 Jun 2022, 11:30

20m

GBR3

Talk Light-flavor and Strangeness PA-Light-flavor and Strangeness

Speakers

Xiatong Wu (Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA) XIATONG WU

Description

We will present model studies of dynamics of baryon number transport, strangeness conservation and their manifestation in $\Omega$-hadron correlations. Although strange quarks are produced in $s\bar{s}$ pairs, the ratio of $\Omega^{-}$ to ${\bar{\Omega}}^{+}$ is greater than one in heavy-ion collisions at RHIC. Thus the produced $\Omega$ hyperons must carry net baryon quantum numbers from the colliding nuclei. We will present results of $\Omega^{-}-K^{\pm}$, ${\bar{\Omega}}^{+}-K^{\pm}$, $\Omega^{-}-\bar{\Xi}$ and $\bar{\Omega}^{+}-\Xi$ correlations from model simulations of Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and 14.6 GeV. These correlations can probe dynamics for baryon number transport to mid-rapidities at these two beam energies. In addition, we use AMPT (default and string-melting modes) and UrQMD models to illustrate how hadronization schemes of quark coalescence and string fragmentations could leave imprints on such correlations. Implications on the experimental program to measure these correlations with the STAR experiment at RHIC will also be discussed.

Presentation materials

SQM_Wu,Xiatong.pdf