2009/01/01 by Johannes Backens, Marc Vanderhaeghen, Б.И. Волков +1
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Electron #Energy (signal processing) #Environmental science #Invariant mass #Meson #Neutrino Physics Research #Neutron #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pion #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Range (aeronautics) #Scattering #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevlett.128.091802
published in Известия Российской академии наук. Механика жидкости и газа 128(6), 115-122 (Cornell University) · 5 pages, 2 figures
openalex publication_date 2009/01/01 · openalex created_date 2016/06/24 · arxiv created 2021/10/12 · arxiv updated 2022/03/14 · openalex updated_date 2026/08/06
We propose a direct search for the X17 particle, which was conjectured to explain the ATOMKI 8Be and 4He 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.