Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite Mass Corrections to Leptonic Decay Constants in the Heavy Quark
  Effective Theory   We calculate finite mass corrections to leptonic decay constants in HQET
using QCD sum rules. The results are given to two--loop accuracy including
renormalization group analysis. The contribution of unknown two--loop anomalous
dimension matrix--elements is estimated. We find that the $1/m_Q$ corrections
to $f_P$, the decay constant of a pseudoscalar meson, amount $-(23\pm4\pm2)\%$
for the B meson. The first error comes from the sum rule uncertainty, the
second one from unknown or not accurately known matrix elements in HQET. We
obtain a ratio of vector to pseudoscalar decay constant of
$1.00\pm0.07+O(1/m_Q^2)$ for B mesons.

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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
1
The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph