Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the B^+/B^0 Production Ratio from the Upsilon(4S) Meson
  using B^+ -> J/psi K^+ and B^0 -> J/psi K^{0}_{S} Decays   We report a measurement of the production ratio of charged and neutral B
mesons from Upsilon(4S) decays based on the ratio of efficiency-corrected
yields for the charmonium modes J/psi K^+ and J/psi K^{0}_{S} with 81.9 fb^-1
of data collected with the BABAR detector on the Upsilon(4S) resonance at
10.580 GeV. We find a value of 1.006 +/- 0.036 (stat) +/- 0.031 (sys) for the
ratio R^{+/0}=Gamma(Upsilon(4S) -> B^+ B^-)/Gamma(Upsilon(4S)->B^0 B^0bar).

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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph