Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First Measurement of the Ratio B(t-->Wb)/B(t-->Wq) and Associated Limit
  on the CKM Element Vtb   We present the first measurement of the ratio of branching fraction R=
B(t-->wb)/B(t-->Wq) from ppbar collisions at sqrt(s)=1.8 TeV. The data set
corresponds to 109 pb-1 of data recorded by the Collider Detector at Fermilab
during the 1992-1995 Tevatron run. We measure R=0.94+.31-.24 (stat+syst) or
R>0.61 (0.56) at 90 (95) %C.L., in agreement with the standard model
predictions. This measurement yields a limit of the Cabibbo-Kobayashi-Maskawa
quark mixing matrix element Vtb under the assumption of three generation
unitarity.

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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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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: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int