14th International Conference on Hypernuclear and Strange Particle Physics - HYP2022

Recent studies on hypernulei lifetimes from STAR

27 Jun 2022, 11:25

25m

online

online talk 1; Mon-II

Speaker

Yue-Hang Leung (Lawrence Berkeley National Laboratory)

Description

The hyperon-nucleon (Y-N) interaction is an essential ingredient in the description of the equation-of-state of high-baryon-density matter. Light hypernuclei (A = 3, 4), being simple Y-N bound states, serve as cornerstones of our understanding of the Y-N interaction. Precise measurements of the lifetimes of light hypernuclei can help provide input to our understanding in the Y-N interaction.

Light hypernuclei are expected to be abundantly produced in intermediate to low energy heavy-ion collisions due to the high baryon density. As a result, the STAR Beam Energy Scan Phase II program, spanning an energy range $\sqrt{s_{\mathrm{N}\mathrm{N}}}=3$-$27$ GeV, is particularly suited for hypernuclei studies. In this talk, recent results on the lifetimes of light hypernuclei $({}_{\mathrm{\Lambda }}^3$H, ${}_{\mathrm{\Lambda }}^4$H, ${}_{\mathrm{\Lambda }}^4$He$)$ measured in $\sqrt{s_{\mathrm{N}\mathrm{N}}}=3$ and $7.2$ GeV Au+Au collisions will be presented. The results will be compared to previous measurements and theoretical calculations, and the physics implications will be discussed.

Presentation materials

hyp20220627v3.pdf