First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron
DOI
10.1103/PhysRevLett.133.211903
Document Type
Journal Article
Publication Date
11-22-2024
Publication Title
Physical Review Letters
Volume
133
Issue
21
ISSN
319007
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.
Open Access
Hybrid_Gold
Repository Citation
Hobart, A., Niccolai, S., Čuić, M., Kumerički, K., Achenbach, P., Alvarado, J., Armstrong, W., Atac, H., Avakian, H., Baashen, L., Baltzell, N., Barion, L., Bashkanov, M., Battaglieri, M., Benkel, B., Benmokhtar, F., & Bianconi, A. (2024). First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron. Physical Review Letters, 133 (21). https://doi.org/10.1103/PhysRevLett.133.211903