Neutrino Constraints and the ATOMKI X17 Anomaly

Abstract

Recent data from the ATOMKI group continues to confirm their claim of the existence of a new $\sim 17$ MeV particle. We review and numerically analyze the data and then put into context constraints from other experiments, notably neutrino scattering experiments such as the latest reactor anti-neutrino coherent elastic neutrino nucleus scattering data and unitarity constraints from solar neutrino observations. We show that minimal scenarios are disfavored and discuss the model requirements to evade these constraints.

11 pages, 4 figures, comments welcome! v2: analysis expanded, results similar, matches published version

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Cited by in corpus (8)

• Search for a new 17 MeV resonance via $e^{+}{e}^{-}$ annihilation with the PADME Experiment
• On the Atomki nuclear anomaly after the MEG-II result
• Ab initio investigation of the ${}^7$Li($p,e^{+}{e}^{-}$)${}^8$Be process and the X17 boson
• Hunting for a 17 MeV particle coupled to electrons
• Probing the ATOMKI X17 vector boson using Dalitz decays $V\to P{e}^{+}{e}^{-}$
• The X17 with Chiral Couplings
• Flavor specific chiral $U(1{)}_X$ framework for explaining the ATOMKI anomaly
• Radiative and Dalitz decays of ${\rm Y}(1S)$ in the light of the ATOMKI X17 anomaly