Publications
Publication Information
| Title | A dispersive approach to two-photon exchange in elastic electron--nucleon scattering |
| Authors | Peter Blunden, Wolodymyr Melnitchouk |
| JLAB number | JLAB-THY-17-2430 |
| LANL number | arXiv:1703.06181 |
| Other number | DOE/OR/23177-4083 |
| 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 C Volume 95 Issue 06 Page(s) 065209 Refereed | |
| Publication Abstract: | We examine the two-photon exchange corrections to elastic electron-nucleon scattering within a dispersive approach, including contributions from both nucleon and \Delta intermediate states. The dispersive analysis avoids off-shell uncertainties inherent in traditional approaches based on direct evaluation of loop diagrams, and guarantees the correct unitary behavior in the high energy limit. Using empirical information on the electromagnetic nucleon elastic and N-\Delta transition form factors, we compute the two-photon exchange corrections both algebraically and numerically. Results are compared with recent measurements of e+ p to e- p cross section ratios from the CLAS, VEPP-3 and OLYMPUS experiments. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevC.95.065209 |
| Accepted Manuscript: | 1703.06181.pdf embargoed final, peer reviewed, accepted manuscript |
| Supporting Documents: | |
| Supporting Datasets: | |