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${{\mathit p}}$ MAGNETIC RADIUS

INSPIRE   PDGID:

S016MCR

This is the rms magnetic radius, $\sqrt {\langle r{}^{2}_{M}\rangle }$.

VALUE (fm) DOCUMENT ID TECN  COMMENT $0.851$ $\pm0.026$ 1 LEE 2015 Combination of world and Mainz data • • We do not use the following data for averages, fits, limits, etc. • • $0.817$ $\pm0.027$ 2 CUI 2021 B FIT use existing ${{\mathit e}}{{\mathit p}}$ data $0.87$ $\pm0.02$ EPSTEIN 2014 Using ${{\mathit e}}{{\mathit p}}$ , ${{\mathit e}}{{\mathit n}}$ , ${{\mathit \pi}}{{\mathit \pi}}$ data $0.867$ $\pm0.009$ $\pm0.018$ ZHAN 2011 SPEC Recoil polarimetry $0.777$ $\pm0.013$ $\pm0.010$ BERNAUER 2010 SPEC ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit p}}$ form factor $0.876$ $\pm0.010$ $\pm0.016$ BORISYUK 2010 Reanalyzes old ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit p}}$ data $0.854$ $\pm0.005$ BELUSHKIN 2007 Dispersion analysis 1  In a consistent reanalysis LEE 2015 extract values separately for the Mainz 2010 data only (0.776+-0.034+-0.017) fm and for the world data without Mainz data (0.914+-0.035) fm. The quoted value is a simple combination of the two, which ignores possible discrepancies and unknown correlations and should be considered with caution. 2  CUI 2021B employ a new mathematical procedure (statistical SPM, Schlessinger point method) based on form-unbiased interpolations of existing ${{\mathit e}}{{\mathit p}}$ scattering data.

References:

CUI 2021B CPL 38 121401 LEE 2015 PR D92 013013 Extraction of the Proton Radius from Electron-Proton Scattering Data EPSTEIN 2014 PR D90 074027 Model Independent Extraction of the Proton Magnetic Radius from Electron Scattering ZHAN 2011 PL B705 59 High-Precision Measurement of the Proton Elastic Form Factor Ratio $\mathit \mu _{p}G_{E}/G_{M}$ at low $\mathit Q{}^{2}$ BERNAUER 2010 PRL 105 242001 High-Precision Determination of the Electric and Magnetic Form Factors of the Proton Also PR C90 015206 Electric and Magnetic Form Factors of the Proton BORISYUK 2010 NP A843 59 Proton Charge and Magnetic rms Radii from the Elastic ${{\mathit e}}{{\mathit p}}$ Scattering data BELUSHKIN 2007 PR C75 035202 Dispersion Analysis of the Nucleon Form Factors Including Meson Continua