Ab initio investigation of the ${}^7$Li($p,e^{+}{e}^{-}$)${}^8$Be process and the X17 boson

P. Gysbers, P. Navratil, K. Kravvaris +2

Observations of anomalies in the electron-positron angular correlations in high-energy decays in ${}^4$He, ${}^8$Be, and ${}^{12}$C have been reported recently by the ATOMKI collaboratio…