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

Asanosuke Jinno; Koichi Murase; Yasushi Nara; Johann Haidenbauer

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arXiv · 2508.19560

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

Asanosuke Jinno·Koichi Murase·Yasushi Nara·Johann Haidenbauer

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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.

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Asanosuke Jinno, Koichi Murase, Yasushi Nara, Johann Haidenbauer. 2025-08-27. $\Lambda$ and $\Sigma$ potentials in dense matter based on chiral EFT: Bridging heavy-ion collisions, hypernuclei, and neutron stars. https://arxiv.org/abs/2508.19560

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