Publications
Publication Information
| Title | Parton distributions from nonlocal chiral SU(3) effective theory. I. Splitting functions |
| Authors | Y. Salamu, Chueng Ji, Wolodymyr Melnitchouk, Anthony Thomas, P. Wang |
| JLAB number | JLAB-THY-18-2746 |
| LANL number | arXiv:1806.07551 |
| Other number | DOE/OR/23177-4478 |
| 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 99 Issue 01 Page(s) 014041 Refereed | |
| Publication Abstract: | We present a new formulation of pseudoscalar meson loop corrections to nucleon parton distributions within a nonlocal covariant chiral effective field theory, including contributions from SU(3) octet and decuplet baryons. The nonlocal Lagrangian, constrained by requirements of local gauge invariance and Lorentz-invariant ultraviolet regularization, generates additional interactions associated with gauge links. We use these to compute the full set of proton to meson + baryon splitting functions, which in general contain on-shell and off-shell contributions, in addition to $\delta$-function terms at zero momentum, along with nonlocal contributions associated with the finite size of the proton. We illustrate the shapes of the various local and nonlocal functions numerically using a simple example of a dipole regulator. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.99.014041 |
| Accepted Manuscript: | PhysRevD.99.014041.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |