2026-06-27T10:59:04Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/72632023-07-19T01:27:14Zcom_20.500.14352_14col_20.500.14352_15

Precise determination of the proton magnetic radius from electron scattering data Alarcón, Jose Manuel Higinbotham, D. W. Weiss, C. We extract the proton magnetic radius from 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- Q 2 form factors. It allows us to use data up to Q 2 ≈ 0.5 GeV 2 for constraining the radii and overcomes the difficulties of empirical fits and Q 2 → 0 extrapolation. We obtain a magnetic radius r p M = 0.850 ± 0.001 ( 1 σ fit uncertainty) + 0.009 − 0.004 (full-range theory uncertainty) fm, significantly different from earlier results obtained from the same data using empirical fits, and close to our extracted electric radius r p E = 0.842 ± 0.002 ( 1 σ fit uncertainty) + 0.005 − 0.002 (full-range theory uncertainty) fm. 2023-06-17T08:29:13Z 2023-06-17T08:29:13Z 2023-06-17T08:29:13Z 2020-09-21 journal article https://hdl.handle.net/20.500.14352/7263 2469-9985 10.1103/PhysRevC.102.035203 eng FPA2016- 77313-P DE-AC05-06OR23177 https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España APS Physics