Publications
Publication Information
| Title | Precise determination of proton magnetic radius from electron scattering data |
| Authors | Douglas Higinbotham, Christian Weiss, Jose Manuel Alarcon Soriano |
| JLAB number | JLAB-THY-20-3149 |
| LANL number | arXiv:2002.05167 |
| Other number | DOE/OR/23177-4926 |
| 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 102 Page(s) 035203 Refereed | |
| Publication Abstract: | We extract the proton magnetic radius from the high-precision electron-proton elastic scattering cross section data. Our theoretical framework combines dispersion analysis and chiral effective field theory and implements the dynamics governing the shape of the low-Q2 form factors. It allows us to use data up to Q2 ~ 0.5 GeV2 for constraining the radii and overcomes the difficulties of empirical fits and Q2 -> 0 extrapolation. We obtain a magnetic radius r_M^p = 0.850 +- 0.001 (fit 68%) +- 0.010 (theory full range) fm, significantly different from earlier results obtained from the same data, and close to the extracted electric radius r_E^p = 0.842 +- 0.002 (fit) +- 0.010 (theory) fm. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevC.102.035203 |
| Accepted Manuscript: | PhysRevC.102.035203.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |