Explanation of the Beryllium Anomaly in a $U(1)'$-Extended 2-Higgs Doublet Model
Luigi Delle Rose, Shaaban Khalil, Stefano Moretti
TL;DR
This paper proposes a $U(1)'$-extended 2-Higgs Doublet Model to explain the Beryllium anomaly observed by Atomki, introducing a light $Z'$ boson with a mass of 17 MeV.
Contribution
It introduces a novel $U(1)'$ extension with a 2-Higgs Doublet structure that accounts for the Beryllium anomaly via a light $Z'$ boson.
Findings
The model successfully explains the Atomki anomaly.
The $Z'$ boson has a mass of approximately 17 MeV.
The scenario remains consistent with existing experimental constraints.
Abstract
We consider an extension of the Standard Model with an extra gauged symmetry in presence of a 2-Higgs Doublet Model structure of the scalar sector. We show that this scenario is able to explain the anomaly observed by the Atomki collaboration in the decay of an excited state of Beryllium via a light spin-1 with a mass of 17 MeV.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Neutrino Physics Research