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X17 discovery potential in the $\gamma N \rightarrow e^+ e^- N$ process at electron scattering facilities by Backens, Johannes; Vanderhaeghen, Marc is a scholarly article available to read on EtoBox.

What is X17 discovery potential in the $\gamma N \rightarrow e^+ e^- N$ process at electron scattering facilities about?

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 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.

Author

Backens, Johannes; Vanderhaeghen, Marc

Published

2021

Language

EN