Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Branching Fractions and Search for CP-Violating Charge
  Asymmetries in Charmless Two-Body B Decays into Pions and Kaons   We present measurements of the branching fractions and a search for
CP-violating charge asymmetries in charmless hadronic decays of B mesons into
two-body final states of kaons and pions. The results are based on a data
sample of approximately 23 million BB(bar) pairs collected by the BABAR
detector at the PEP-II asymmetric B Factory at SLAC. We find the following
branching fractions: BF(B0-->pi+pi-)= (4.1+/-1.0+/-0.7) x 10^{-6},
BF(B0-->K+pi-)=(16.7+/-1.6+/-1.3) x 10^{-6},
BF(B+-->K+pi0)=(10.8^{+2.1}_{-1.9}+/-1.0) x 10^{-6},
BF(B+-->K0pi+)=(18.2^{+3.3}_{-3.0}+/-2.0) x 10^{-6},
BF(B0-->K0pi0)=(8.2^{+3.1}_{-2.7}+/-1.2) x 10^{-6}. We also report the 90%
confidence level upper limits BF(B0-->K+K-) < 2.5 x 10^{-6}, BF(B+-->pi+pi0) <
9.6 x 10^{-6}, and BF(B+-->anti-K0K+) < 2.4 x 10^{-6}. In addition, charge
asymmetries have been measured and found to be consistent with zero, where the
statistical precision is in the range of +/-0.10 to +/-0.18, depending on the
decay mode.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg