Physical Review Letters
We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values of the Bjorken variable 𝓍B. DVCS is sensitive to the generalized parton distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton form factors (CFFs) of the nucleon as a function of 𝓍B, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.
Original Publication Citation
Georges, F., Rashad, M.N.H., Stefanko, A. ... Zhang, J., Zhao, Y., Zhu, P. (2022) Deeply virtual Compton scattering cross section at high Bjorken 𝓍B. Physical Review Letters, 128 (25), 1-7, Article 252002. https://doi.org/10.1103/PhysRevLett.128.252002
(0000-0002-4136-2572) Bulumulla, (0000-0001-7282-8120) Hyde
Georges, F.; Rashad, M.N.H.; Stefanko, A.; Zhang, J.; Zhao, Y.; Zhu, P.; and et al., "Deeply Virtual Compton Scattering Cross Section at High Bjorken 𝓍B" (2022). Physics Faculty Publications. 593.