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Authors: Backens, Johannes
Vanderhaeghen, Marc
Title: X17 discovery potential in the γN → e + e − N process at electron scattering facilities
Online publication date: 3-May-2023
Year of first publication: 2022
Language: english
Abstract: We propose a direct search for the X17 particle, which was conjectured to explain the ATOMKI 8 Be and 4 He anomalies, through the dilepton photoproduction process on a nucleon in the photon energy range below or around the pion production threshold. For the scenarios of either pseudoscalar, vector, or axial-vector quantum numbers of the conjectured X17, we use existing constraints to estimate the X17 signal process. For dilepton invariant mass resolutions which have been achieved in previous experiments, a signal-to-background ratio of up to an order of magnitude is found for a neutron target, and, in particular, for the pseudoscalar and vector X17 scenarios.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY
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Journal: Physical Review Letters
Pages or article number: 091802
Publisher: American Physical Society
Publisher place: College Park, Md
Issue date: 2022
ISSN: 1079-7114
Publisher DOI: 10.1103/physrevlett.128.091802
Appears in collections:DFG-491381577-H

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