AUTHOR=Delle Rose Luigi , Khalil Shaaban , King Simon J. D. , Moretti Stefano TITLE=New Physics Suggested by Atomki Anomaly JOURNAL=Frontiers in Physics VOLUME=7 YEAR=2019 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2019.00073 DOI=10.3389/fphy.2019.00073 ISSN=2296-424X ABSTRACT=

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.