Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational signature of Schwarzschild black holes in dynamical
  Chern-Simons gravity   Dynamical Chern-Simons gravity is an extension of General Relativity in which
the gravitational field is coupled to a scalar field through a parity-violating
Chern-Simons term. In this framework, we study perturbations of spherically
symmetric black hole spacetimes, assuming that the background scalar field
vanishes. Our results suggest that these spacetimes are stable, and small
perturbations die away as a ringdown. However, in contrast to standard General
Relativity, the gravitational waveforms are also driven by the scalar field.
Thus, the gravitational oscillation modes of black holes carry imprints of the
coupling to the scalar field. This is a smoking gun for Chern-Simons theory and
could be tested with gravitational-wave detectors, such as LIGO or LISA. For
negative values of the coupling constant, ghosts are known to arise, and we
explicitly verify their appearance numerically. Our results are validated using
both time evolution and frequency domain methods.

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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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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: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: eess