Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Analysis of the Decay $B \rightarrow D^* X \ell \bar\nu_\ell$ with
  Predictions from Heavy Quark and Chiral Symmetry   This paper considers the implications of the heavy quark and chiral
symmetries for the semi-leptonic decay $B \rightarrow D^* X \ell \bar
\nu_\ell$. The general kinematic analysis for decays of the form {\sl
pseudoscalar meson $\rightarrow$ vector meson $+$ pseudoscalar meson $+$ lepton
$+$ anti-lepton} is presented. This formalism is applied to the above exclusive
decay which allows the differential decay rate to be expressed in a form that
is ideally suited for the experimental determination of the different form
factors for the process through angular distribution measurements. Heavy quark
and chiral symmetry predictions for the form factors are presented, and the
differential decay rate is calculated in the kinematic region where chiral
perturbation theory is valid.

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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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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: physics
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph