Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inclusive Semileptonic B and Polarized Lambda_b Decays from QCD   The differential decay spectrum $d\Gamma/dE_e dq^2$ for the semileptonic
decay of an unpolarized hadron containing a b-quark, and the decay spectrum
$d\Gamma/dE_e dq^2 d\!\cos\theta$ for polarized $\Lambda_b$ decay are computed
to second order in the $1/m_b$ expansion. Most of the $1/m_b^2$ corrections
have a simple physical interpretation, which is discussed in detail. The
implications of the results for the determination of $V_{ub}$ are discussed.
The decay spectra for semileptonic decay of hadrons containing a c-quark are
also given. There is a subtlety in the use of the equations of motion at order
$1/m_b^2$ in the heavy quark expansion which is explained.

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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc