Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Preliminary heavy-light decay constants from the MILC collaboration   Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$,
$f_{D_s}$ and their ratios are presented. We compute in the quenched
approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson light quarks and static
and Wilson heavy quarks. We attempt to quantify systematic errors due to finite
volume, finite lattice spacing, large $am$, and fitting and extrapolation
uncertainties. The hopping parameter approach of Henty and Kenway is used to
treat the heavy quarks; the sources are Coulomb gauge gaussians.

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The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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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: cmp-lg
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The categories of this paper are: q-bio
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat