Publications
Publication Information
| Title | Nonlocal chiral contributions to generalized parton distributions of the proton at nonzero skewness |
| Authors | Zhengyang Gao, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, Ping Wang |
| JLAB number | JLAB-THY-24-4069 |
| LANL number | (None) |
| Other number | DOE/OR/23177-7505 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review D Volume 110 Page(s) 054049 Refereed | |
| Publication Abstract: | We compute the one-loop contributions to spin-averaged generalized parton distributions (GPDs) in the proton from pseudoscalar mesons with intermediate octet and decuplet baryon states at nonzero skewness. Our framework is based on nonlocal covariant chiral effective theory, with ultraviolet divergences regularized by introducing a relativistic regulator derived consistently from the nonlocal Lagrangian. Using the splitting functions calculated from the nonlocal Lagrangian, we find the nonzero skewness GPDs from meson loops by convoluting with the phenomenological pion GPD and the generalized distribution amplitude, and verify that these satisfy the correct polynomiality properties. We also compute the lowest two moments of GPDs to quantify the meson loop effects on the Dirac, Pauli and gravitational form factors of the proton. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.110.054049 |
| Accepted Manuscript: | PhysRevD.110.054049.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |