Exclusive π- Electroproduction off the neutron in deuterium in the resonance region

Abstract

New results for the exclusive and quasifree cross sections off neutrons bound in deuterium γvn(p)→pπ-(p) are presented over a wide final state hadron angle range with a kinematic coverage of the invariant mass (W) up to 1.825 GeV and the four-momentum transfer squared (Q2) from 0.4 to 1.0 GeV2. The exclusive structure functions were extracted and their Legendre moments were obtained. Final-state-interaction contributions have been kinematically separated from the extracted quasifree cross sections off bound neutrons solely based on the analysis of the experimental data. These new results will serve as long-awaited input for phenomenological analyses to extract the Q2 evolution of previously unavailable n→N∗ electroexcitation amplitudes and to improve state-of-the-art models of neutrino scattering off nuclei by augmenting the already available results from free protons.

Metadata

©2023 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details Funding Information: The authors thank the administrative and technical staff at Jefferson Laboratory and at all other participating institutions for their invaluable contributions to the success of the experiment. This work was supported in parts by the National Science Foundation (NSF) under Grant No. PHY 1812382, the U.S. Department of Energy (DOE) under Contract No. DE-AC05-06OR23177, the Physics Department of the University of South Carolina (USC), Jefferson Science Associates (JSA), the National Research Foundation of Korea, the Chilean National Agency of Research and Development ANID PIA/APOYO AFB180002, and the Skobeltsyn Nuclear Physics Institute and Physics Department at the Lomonosov Moscow State University.

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