Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the neutral $D$ meson mixing parameters in a
  time-dependent amplitude analysis of the $D^0\to\pi^+\pi^-\pi^0$ decay   We measure the $D^0 - {\bar{D}}^0$ mixing parameters using a time-dependent
amplitude analysis of the decay $D^0\to\pi^+\pi^-\pi^0$. The data were recorded
with the BABAR detector at center-of-mass energies at and near the
$\Upsilon(4S)$ resonance, and correspond to an integrated luminosity of
approximately 468.1 ${\rm fb}^{-1}$. The neutral $D$ meson candidates are
selected from $D^{*}(2010)^+\to D^0 \pi_s^+$ decays where the flavor at the
production is identified by the charge of the low momentum pion, $\pi_s^+$. The
measured mixing parameters are $x = (1.5\pm1.2\pm0.6) \%$ and $y =
(0.2\pm0.9\pm0.5) \%$, where the quoted uncertainties are statistical and
systematic, respectively.

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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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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: hep-th
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The categories of this paper are: cs
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph