Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptonic Decays of Heavy Quarks on the Lattice   The status of lattice calculations of heavy-light decay constants and of the
$B$ parameter $B_B$ is reviewed. After describing the lattice approach to heavy
quark systems, the main results are discussed, with special emphasis on the
systematic errors in present lattice calculations. A detailed analysis of the
continuum limit for decay constants is performed. The implications of lattice
results on studies of CP violation in the Standard Model are discussed.

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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: dg-ga