$\Lambda$ and $\Sigma$ potentials in dense matter based on chiral EFT: Bridging heavy-ion collisions, hypernuclei, and neutron stars

Abstract

The $\Lambda$ and $\Sigma$ directed flows at $\sqrt{s_{NN}}=4.5\mathrm{GeV}$ are investigated to examine their sensitivity to the hyperon single-particle potentials. The single-particle potentials are obtained from $G$-matrix calculations with two- and three-body forces based on SU(3) chiral effective field theory. The $\Lambda +{\Sigma }^0$ directed flow shows sensitivity to the variation in the $\Sigma$ single-particle potential. Its effect is more pronounced for the ${\Sigma }^0$ directed flow.

Comments: 4 pages, 2 figures, Submitted to Proceedings of Quark Matter 2025 (QM2025)