Resolving the $\Lambda$ hypernuclear overbinding problem in pionless effective field theory

Lorenzo Contessi, Nir Barnea, Avraham Gal

We address the $\Lambda$-hypernuclear `overbinding problem' in light hypernuclei which stands for a 1--3 MeV excessive $\Lambda$ separation energy calculated in ${}_{\Lambda }^5$He. This problem arises i…