Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for B+ -> K0barK+ and B0 -> K0K0bar, and Measurement of the
  Branching Fraction and Search for Direct CP Violation in B+ -> K0pi+   We present evidence for the b -> d penguin-dominated decays B+ -> K0barK+ and
B0 -> K0K0bar with significances of 3.5 and 4.5 standard deviations,
respectively. The results are based on a sample of 227 million Y(4S) -> BBbar
decays collected with the BaBar detector at the PEP-II asymmetric-energy e+e-
collider at SLAC. We measure the branching fractions Br(B+ -> K0barK+) = (1.5
+- 0.5 +- 0.1) x 10^{-6} (< 2.4 x 10^{-6}) and Br(B0 -> K0K0bar) =
(1.19^{+0.40}_{-0.35} +- 0.13) x 10^{-6}, where the uncertainties are
statistical and systematic, respectively, and the upper limit on the branching
fraction for K0barK+ is at the 90% confidence level. We also present improved
measurements of the charge-averaged branching fraction Br(B+ -> K0pi+) = (26.0
+- 1.3 +- 1.0) x 10^{-6} and CP-violating charge asymmetry A_CP(K0pi+) = -0.09
+- 0.05 +- 0.01, where the uncertainties are statistical and systematic,
respectively.

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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
2
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: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph