Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: B-Meson Wavefunction in the Wandzura-Wilczek Approximation   The B-meson wavefunction has been studied with the help of the
vacuum-to-meson matrix element of the nonlocal operators in the heavy quark
effective theory. In order to obtain the Wandzura-Wilczek-type B-meson
wavefunction, we solve the equations which are derived from the equation of
motion of the light spectator quark in the B meson by using two different
assumptions. Under the condition that $\omega_0=2\bar{\Lambda}$, the solutions
for the B-meson wavefunction in this paper agree well with the one obtained by
directly taking the heavy quark limit $m_b\to\infty$. Our results show that the
equation of motion of the light spectator quark in the B meson can impose a
strong constraint on the B-meson wavefunctions $\Psi_\pm(\omega,z^2)$. Based on
the obtained results, we claim that both its distribution amplitudes
$\phi_B(\omega)$ and $\bar\phi_B(\omega)$ are important for calculating the B
meson decays.

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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex