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=<p>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 <italic>e</italic><sup>+</sup><italic>e</italic><sup>−</sup> 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.</p>