Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Explaining $W$ boson mass anomaly and dark matter with a $U(1)$ dark
  sector   The $W$ boson mass recently reported by the CDF collaboration shows a
deviation from the standard model prediction with an excess at $7\sigma$ level.
We investigate two simple extensions of the standard model with an extra $U(1)$
dark sector. One is the $U(1)_x$ extension, where the $U(1)_x$ gauge field
mixes with the standard model through gauge kinetic terms. The other is a
general $U(1)_{\alpha Y+\beta q}$ extension of the standard model. Fitting
various experimental constraints we find the $U(1)_x$ extension with only
kinetic mixing can enhance the $W$ boson mass for at most 10 MeV. While the
$U(1)_{\alpha Y+\beta q}$ extension can easily generate 77 MeV enhancement of
the $W$ boson mass and also offer a viable dark matter candidate with mass
ranging from several hundred GeV to TeV, which may be detected by future dark
matter direct detection experiments with improved sensitivities.

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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph