We consider several extensions of the Standard Model (SM) which can explain the anomalies observed by the Atomki collaboration in the decay of excited states of Beryllium via a new boson with a mass around 17 MeV yielding e+e− pairs. We show how both spin-0 and 1 solutions are possible and describe the Beyond the SM (BSM) scenarios that can accommodate these. They include BSM frameworks with either an enlarged Higgs, or gauge sector, or both.
@article{arxiv.1812.05497,
title = {New Physics Suggested by Atomki Anomaly},
author = {Luigi Delle Rose and Shaaban Khalil and Simon J. D. King and Stefano Moretti},
journal= {arXiv preprint arXiv:1812.05497},
year = {2019}
}