Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precise determination of proton magnetic radius from electron scattering
  data   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-$Q^2$ form factors. It allows us to use
data up to $Q^2\sim$ 0.5 GeV$^2$ for constraining the radii and overcomes the
difficulties of empirical fits and $Q^2 \rightarrow 0$ extrapolation. We obtain
a magnetic radius $r_M^p$ = 0.850 $\pm$0.001 (fit 68%) $\pm$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 $\pm$0.002
(fit) $\pm$0.010 (theory) fm.

25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th