${}^8$Be Decay Anomaly and Light $Z'$

Abstract

In this proceedings, we discuss a light (17 MeV) $Z'$ solution to the anomaly observed in the decay of Beryllium-8 by the Atomki collaboration. We detail an anomaly free model with minimal particle content which can satisfy all other experimental constraints with gauge couplings $\mathcal{O}(10^{-4})$.

Prepared for the 2019 EW session of the 54th Rencontres de Moriond, talk presented by Simon King