Speaker
Description
The hyperon-nucleon (Y-N) interaction is an important 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, are cornerstones of our understanding of the Y-N interaction. Precise measurements of the lifetimes and binding energies of light hypernuclei are of particular interest.
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 of $\sqrt{s_{\rm{NN}}}=3.0-27.0$ GeV, is particularly suited for hypernuclei studies. In this talk, recent results on the lifetimes of ${}^{3}_{\Lambda}$H, ${}^{4}_{\Lambda}$H, ${}^{4}_{\Lambda}$He measured in $\sqrt{s_{\rm{NN}}}=3.0$ and $7.2$ GeV Au+Au collisions will be presented. The binding energies of ${}^{4}_{\Lambda}$H, ${}^{4}_{\Lambda}$He measured in $\sqrt{s_{\rm{NN}}}=3.0$ GeV Au+Au collisions will also be presented. These results will be compared to previous measurements and theoretical calculations, and the physics implications will be discussed.
| speaker affiliation | University of Heidelberg |
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