PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Hadrons in medium - hyperons and mesons in nuclear matter
S-shell $\Lambda$ and $\Lambda\Lambda$ hypernuclei based on chiral effective field theory
H. Le*, J. Haidenbauer, U.G. Meißner and A. Nogga
Full text: pdf
Pre-published on: March 02, 2022
Published on: May 24, 2022
We present results for $\Lambda$ and $\Lambda\Lambda$ hypernuclei with $A=4-7$ using the Jacobi no-core shell model in combination with baryon-baryon interactions derived within the framework of chiral effective field theory. First, we discuss the predictions of two almost phase-equivalent next-to-leading order YN interactions, NLO13 and NLO19, for the $^4_{\Lambda}\mathrm{He}$,
$^5_{\Lambda}\mathrm{He}$, and $^7_{\Lambda}\mathrm{Li}$ systems.
We then report on a calculation of $s$-shell $\Lambda\Lambda$ hypernuclei based on chiral YY potentials at LO and NLO. The prediction of NLO for $^{\text{ }\text{ }\text{ } \text{}6}_{\Lambda \Lambda}\text{He}$ are consistent with experiment. Both interactions also yield a bound state for $^{\text{ }\text{ }\text{ } \text{}5}_{\Lambda \Lambda}\text{He}$, whereas the $^{\text{ }\text{ }\text{ } \text{}4}_{\Lambda \Lambda}\text{H}$
system is predicted to be unbound.
DOI: https://doi.org/10.22323/1.380.0205
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