Document Type

Article

Publication Date

2024

DOI

10.1103/PhysRevLett.133.2119

Publication Title

Physical Review Letters

Volume

133

Issue

21

Pages

211903 (1-7)

Abstract

Measuring deeply virtual Compton scattering (DVCS) on the neutron is one of the necessary steps to understand the structure of the nucleon in terms of generalized parton distributions (GPDs). Neutron targets play a complementary role to transversely polarized proton targets in the determination of the GPD 𝐸. This poorly known and poorly constrained GPD is essential to obtain the contribution of the quarks’ angular momentum to the spin of the nucleon. DVCS on the neutron was measured for the first time selecting the exclusive final state by detecting the neutron, using the Jefferson Lab longitudinally polarized electron beam, with energies up to 10.6 GeV, and the CLAS12 detector. The extracted beam-spin asymmetries, combined with DVCS observables measured on the proton, allow a clean quark-flavor separation of the imaginary parts of the Compton form factors ℋ and ℰ.

Rights

© 2024 The Authors.

Published under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Further distribution of this work must maintain attribution to the authors and the published article's title, journal citation, and DOI.

Original Publication Citation

Hobart, A., Niccolai, S., Cuic, M., Kumericki, K., Achenbach, P., Alvarado, J. S., Armstrong, W. R., Atac, H., Avakian, H., Baashen, L., Baltzell, N. A., Barion, L., Bashkanov, M., Battaglieri, M., Benkel, B., Benmokhtar, F., Bianconi, A., Biselli, A. S., Boiarinov, S.,…Zurek, M. (2024). First measurement of deeply virtual Compton scattering on the neutron with detection of the active neutron. Physical Review Letters, 133(21), 1-7, Article 211903. https://doi.org/10.1103/PhysRevLett.133.211903

ORCID

0000-0003-2086-2807 (Hattawy), 0000-0003-2243-6836 (Kuhn), 0009-0001-3106-6024 (Pokhrel),

Supplemental_Materials_PRL_nDVCS.pdf (968 kB)
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