Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring primordial anisotropic correlators with CMB spectral
  distortions   We show that inflationary models with broken rotational invariance generate
testable off-diagonal signatures in the correlation between the $\mu$-type
distortion and temperature fluctuations of the cosmic microwave background.
More precisely, scenarios with a quadrupolar bispectrum asymmetry, usually
generated by fluctuations of primordial vector fields, produce a nonvanishing
$\mu$-$T$ correlation when $|\ell_1-\ell_2|=2$. Since spectral distortions are
sensitive to primordial fluctuations up to very small scales, a cosmic variance
limited spectral distortion experiment can detect such effects with a high
signal-to-noise ratio.

18
The categories of this paper are: econ
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
29
The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin