Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\tau^-\to K^-\eta^{(\prime)}\nu_\tau$ decays in Chiral Perturbation
  Theory with Resonances   We have studied the $\tau^-\to K^-\eta^{(\prime)}\nu_\tau$ decays within
Chiral Perturbation Theory including resonances as explicit degrees of freedom.
We have considered three different form factors according to treatment of
final-state interactions. In increasing degree of soundness: Breit-Wigner,
exponential resummation and dispersive representation. We find that although
the first one fails in accounting for the data on the $K\eta$ mode, the other
two approaches provide good fits to them which are sensitive to the
$K^\star(1410)$ pole parameters, that are determined to be
$M_{K^{\star\prime}}\,=\,(1330^{+27}_{-41})$ MeV and
$\Gamma_{K^{\star\prime}}\,=\,(217^{+68}_{-122})$ MeV. These values are
competitive with the standard determination from $\tau^-\to(K\pi)^-\nu_\tau$
decays. The corresponding predictions for the $\tau^-\to
K^-\eta^{\prime}\nu_\tau$ channel respect the current upper bound and hint to
the discovery of this decay mode in the near future.

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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg