Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New formulation of gamma-Z box corrections to the weak charge of the
  proton   We present a new formulation of one of the major radiative corrections to the
weak charge of the proton -- that arising from the axial-vector hadron part of
the $\gamma Z$ box diagram, $\Re{\rm e}\, \Box_{\gamma Z}^{\rm A}$. This
formulation, based on dispersion relations, relates the $\gamma Z$
contributions to moments of the $F_3^{\gamma Z}$ interference structure
function. It has a clear connection to the pioneering work of Marciano and
Sirlin, and enables a systematic approach to improved numerical precision.
Using currently available data, the total correction from all intermediate
states is $\Re{\rm e}\, \Box_{\gamma Z}^{\rm A} = 0.0044(4)$ at zero energy,
which shifts the theoretical estimate of the proton weak charge from
$0.0713(8)$ to $0.0705(8)$. The energy dependence of this result, which is
vital for interpreting the Q$_{\rm weak}$ experiment, is also determined.

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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn