Abstract
We revisit the application of the Froissart-Gribov (FG) projections in the analysis of amplitudes for deeply virtual Compton scattering (DVCS), providing essential information on generalized parton distributions (GPDs). The pivotal role of these projections in a systematic description of a hadron’s response to the stringlike QCD probes characterized by different values of angular momentum is emphasised. For the first time, we establish a relationship between the FG projections and GPDs for spin-½ targets, and we investigate these quantities in various GPD models. Finally, we provide the first numerical estimates for the FG projections based on the DVCS amplitudes directly extracted from experimental data. We argue the method of the FG projections deserves a broad application in the DVCS phenomenology.
- Received 21 December 2023
- Accepted 30 January 2024
DOI:https://doi.org/10.1103/PhysRevD.109.054010
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society