Speaker
Description
The hyperon single-particle potential in nuclear matter is a key quantity in discussing whether hyperons can appear in neutron stars. We investigate the Lambda and Sigma potentials calculated by using baryon interactions based on chiral effective field theory (chiral EFT). The resulting Lambda potential is sufficiently repulsive to suppress the appearance of hyperons in neutron stars. To examine the consistency of these potentials with experimental data, we perform model calculations to compare the results with both Lambda hypernuclear data and heavy-ion collision data. For the heavy-ion collision simulation, we newly incorporate the Sigma single-particle potential calculated by using the same baryon interactions as for Lambda. In this talk, we discuss the impact of hyperon potentials on experimental observables and explore whether the differences among the models are significant enough to be tested.
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