Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Study of $ K^0$--$\bar{K}^0$ Mixing and $ B_K $   We have computed $ B_K $ with staggered fermions, using two different
methods: both in the one spin trace form and two spin trace form. Renormalized
results in both forms are in good agreement. The numerical simulations were
performed on a $ 16^3 \times 40 $ lattice in full QCD with $ \beta = 5.7 $. We
also tried an improved wall source method in order to select only the
pseudo-Goldstone bosons and compare the numerical results obtained with those
from the conventional wall source method. We have studied $ B_K $ with a series
of non-degenerate quark anti-quark pairs and saw no effect on $ B_K $, although
dramatic effects in the chiral limit were seen on the individual terms making
up $ B_K $.

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The categories of this paper are: math-ph
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The categories of this paper are: physics
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The categories of this paper are: cs
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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: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc