• Corpus ID: 231749522

# A Standard Model Explanation for the"ATOMKI Anomaly"

@inproceedings{Aleksejevs2021ASM,
title={A Standard Model Explanation for the"ATOMKI Anomaly"},
author={Aleksandrs Aleksejevs and Svetlana Barkanova and Yu. G. Kolomensky and B. Sheff},
year={2021}
}
• Published 1 February 2021
• Physics
Using the e+e− pair spectrometer at the 5 MV Van de Graaff accelerator at the Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Krasznahorkay et al. have claimed a 6.8σ excess at high e+e− opening angles in the internal pair creation isoscalar transition Be(18.15) → Be e+e−. A hypothetical gauge boson with the mass circa 17 MeV, “X17”, has been proposed as an explanation for the excess. We show that the observed experimental structure can be reproduced within the Standard…
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