Speaker
Description
A unified approach integrating heavy-ion collisions, other nuclear experiments, and neutron stars with the modern nuclear force
from chiral effective field theory (chiral EFT) has provided valuable insights into the properties of the equation of state of dense matter. For a microscopic description of dense matter, such an approach should be performed also for the hyperon sector, particularly for addressing the long-standing hyperon puzzle of neutron stars. In this talk, I will introduce our research on verifying the validity of the Lambda single-particle potential (Lambda potential) in dense matter calculated from the baryon force based on chiral EFT. This potential is sufficiently repulsive to avoid the hyperon puzzle. We find that the model calculations with the Lambda potential are consistent with the Lambda hypernuclear spectroscopy [1] and the Lambda directed flow [2].
[1] A. Jinno, K. Murase, Y. Nara, and A. Ohnishi, Phys. Rev. C 108 (2023) 065803.
[2] Y. Nara, A. Jinno, K. Murase, and A. Ohnishi, Phys. Rev. C 106 (2022) 044902.
