Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proton charge radius from a dispersive analysis of the latest space-like
  $e$-$p$ scattering data   We present a dispersion theoretical analysis of recent date from
electron-proton scattering. This allows for a high-precision extraction of the
electric and magnetic radius of the proton, $r_E = (0.839\pm
0.002{}^{+0.002}_{-0.003})$~fm and $r_M = (0.846\pm
0.001{}^{+0.001}_{-0.005})$~fm, where the first error refers to the statistical
type estimated from the bootstrap method, and the second one refers to the
systematic uncertainty related to the underlying spectral functions.

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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio