Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of B-->D(*)anti-D(*) decays with the BABAR detector   Decays of the type B-->D(*)anti-D(*) can be used to provide a measurement of
the parameter sin2beta of the Unitarity Triangle that is complementary to that
derived from the mode \bpsiks. Here we report a measurement of the branching
fraction and a study of the CP parity content for the decay B^0 -->
D^{*+}D^{*-} with the BABAR detector. With data corresponding to an integrated
luminosity of 20.7 fb^{-1} collected at the Upsilon(4S) resonance during
1999-2000, we determine the branching fraction to be
BF(B^0-->D^{*+}D^{*-})=(8.0 +/- 1.6 (stat) +/- 1.2 (syst)) x 10^{-4}. The
measured fraction of the component with odd CP parity is 0.22 +/- 0.18(stat)
+/- 0.03(syst). Observation of a significant number of candidates in the decay
modes B^0-->D^{*+}D^- and B^+ --> D^{*+}D^{*0} is reported. All results
presented in this note are preliminary.

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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga