Speaker
Description
The scarcity of hyperon-nucleon (YN) and hyperon-hyperon (YY) scattering data presents an enormous challenge for nuclear physicists in an attempt to derive baryon-baryon (BB) interactions from a microscopic level. Therefore $S=-1$ and $S=-2$ hypernuclei are important laboratories for testing BB interaction models and provide essential information for constructing realistic potentials. In this contribution, we employ the Jacobi no-core shell model (J-NCSM) approach to study the predictions of the two chiral next-to-leading order (NLO) YN interactions, NLO13 and NLO19, for $\Lambda$ hypernuclei up to the p-shell. We also investigate possible implications of an increased $\Lambda$-separation energy of $^3_{\Lambda}\text{H}$ on the separation energies of $A=4-7$ hypernuclei. Finally, we report our first results for $\Lambda\Lambda$ s-shell hypernuclei based on chiral YY potentials at LO and NLO. The NLO results for $^{\text{ }\text{ }\text{ } \text{}6}_{\Lambda \Lambda}\text{He}$ are consistent with experiment. Both interactions also yield a bound state for $^{\text{ }\text{ }\text{ } \text{}5}_{\Lambda \Lambda}\text{He}$. The $^{\text{ }\text{ }\text{ } \text{}4}_{\Lambda \Lambda}\text{H}$ system is predicted to be unbound.
