Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SU(3) Breaking of Leading--Twist K and K* Distribution Amplitudes - a
  Reprise   We review the status of the leptonic decay constants f_K and
f_K^{\parallel,\perp} of the K and K*, respectively, and the SU(3) breaking
quantities a_1(K) and a_{1}^{\parallel,\perp}(K*), the first Gegenbauer-moments
of the leading-twist distribution amplitudes of K and K*. We obtain new
predictions from QCD sum rules which are relevant for the calculation of K and
K* form factors, for instance T_1^{B->K*}, which determines the decay B -> K*
gamma, and for QCD factorisation calculations of nonleptonic B decays into
strange mesons, for instance B -> K pi.

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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph