Leading neutron energy and pT distributions in deep inelastic scattering and photoproduction at HERA
(2007) Nuclear Physics, Section B — Vol. 776, n° 1-2, p. 1-37 (2007)
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- (en) The production of energetic neutrons in $ep$ collisions has been studied with the ZEUS detector at HERA. The neutron energy and $p_T^2$ distributions were measured with a forward neutron calorimeter and tracker in a $40 \pb^{-1}$ sample of inclusive deep inelastic scattering (DIS) data and a $6 \pb^{-1}$ sample of photoproduction data. The neutron yield in photoproduction is suppressed relative to DIS for the lower neutron energies and the neutrons have a steeper $p_T^2$ distribution, consistent with the expectation from absorption models. The distributions are compared to HERA measurements of leading protons. The neutron energy and transverse-momentum distributions in DIS are compared to Monte Carlo simulations and to the predictions of particle exchange models. Models of pion exchange incorporating absorption and additional secondary meson exchanges give a good description of the data. Comment: 48 pages, 6 tables, 23 figures, minor revisions, accepted by Nuclear Physics B
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Piotrzkowski, K., Chekanov, S., de Favereau, J., & et al. (2007). Leading neutron energy and pT distributions in deep inelastic scattering and photoproduction at HERA. Nuclear Physics, Section B, 776(1-2), 1-37. https://doi.org/10.1016/j.nuclphysb.2007.03.045 (Original work published 2007)