Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining the gravitational coupling of axion dark matter at LIGO   The axion-gravity Chern-Simons coupling is well motivated but is relatively
weakly constrained, partly due to difficult measurements of gravity. We study
the sensitivity of LIGO measurements of chirping gravitational waves (GWs) on
such coupling. When the frequency of the propagating GW matches with that of
the coherent oscillation of axion dark matter field, the decay of axions into
gravitons can be stimulated, resonantly enhancing the GW. Such a resonance peak
can be detected at LIGO as a deviation from the chirping waveform. Since all
observed GWs will undergo similar resonant enhancement from the Milky-Way (MW)
axion halo, LIGO O1+O2 observations can potentially provide the strongest
constraint on the coupling, at least for the axion mass $m_a = 5 \times
10^{-13} - 5 \times 10^{-12}$ eV. Along the course, we also emphasize the
relevance of the finite coherence of axion fields and the ansatz separating
forward and backward propagations of GWs. As a result, the parity violation of
the Chern-Simons coupling is not observable from chirping GWs.

15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat