Study of hyperon-hyperon correlations and search for $H$-dibaryon using STAR detector at RHIC

TL;DR

This paper reports on measurements of b4b4 correlations and a search for the H-dibaryon in high-energy Au+Au collisions at RHIC, utilizing STAR detector data to explore strange particle interactions and potential exotic states.

Contribution

First measurement of b4b4 correlations in Au+Au collisions at multiple energies and a search for the H-dibaryon using STAR data at RHIC.

Findings

b4b4 correlation data obtained at three energies.

Search for H-dibaryon via its weak decay channel conducted.

Results contribute to understanding strange baryon interactions and exotic states.

Abstract

High yield of strange particle production per central collision in nucleus-nucleus collisions at RHIC and high statistics data set from STAR experiment allow us to measure \Lambda\Lambda correlations. The \Lambda\Lambda correlation measurement is also closely related to a possible six-quark state H-dibaryon, which is yet to be observed experimentally. The first measurement of \Lambda\Lambda correlations in Au+Au collisions for \sqrt{s_{NN}}= 39, 62.4 and 200 GeV and search for H-dibaryon with its weak decay \Lambda p\pi in Au+Au collisions for \sqrt{s_{NN}}= 200 GeV using the STAR experiment at RHIC are presented here.