Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weak B Decays into Orbitally Excited Charmed Mesons   The BaBar Collaboration has recently reported branching fractions for
semileptonic decays of the $B$ meson into final states with charged and neutral
$D_{1}(2420)$ and $D_{2}^{\ast}(2460)$, two narrow orbitally excited charmed
mesons. We evaluate these branching fractions within the framework of a
constituent quark model in two steps, one which involves a semileptonic decay
and the other one mediated by a strong process. Our results are in agreement
with the experimental data.

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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: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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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: physics
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an