Speaker
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 $\sqrt{s_{\rm{NN}}}=3$-$27$ GeV, is particularly suited for hypernuclei studies. In this talk, recent results on the lifetimes of light hypernuclei $({}^{3}_{\Lambda}$H, ${}^{4}_{\Lambda}$H, ${}^{4}_{\Lambda}$He$)$ measured in $\sqrt{s_{\rm{NN}}}=3$ 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.
