Measurement of branching fractions and search for CP-violating charge asymmetries in charmless two-body B decays into pions and kaons

B Aubert, Paul Bright-Thomas, Theresa Harrison, Christopher Hawkes, Andrew Kirk, David Knowles, Stephen O'Neale, Richard Penny, Alan Watson, Nigel Watson

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57 Citations (Scopus)

Abstract

We present measurements, based on a sample of approximately 23x10(6) BB pairs, 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. We find the branching fractions B(B0-->pi(+)pi(-)) = (4.1+/-1.0+/-0.7)x10(-6), B(B0-->K+pi(-)) = (16.7+/-1.6+/-1.3)x10(-6), B(B+-->K+pi(0)) = (10.8(+2.1)(-1.9)+/-1.0)x10(-6), B(B+-->K0pi(+)) = (18.2(+3.3)(-3.0)+/-2.0)x10(-6), B(B0-->K0pi(0)) = (8.2(+3.1)(-2.7)+/-1.2)x10(-6). We also report 90% confidence level upper limits for B meson decays to the pi(+)pi(0), K+K-, and K0K+ final states. In addition, charge asymmetries have been 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.
Original languageEnglish
Pages (from-to)151802
Number of pages1
JournalPhysical Review Letters
Volume87
Issue number15
Early online date1 Sep 2001
DOIs
Publication statusPublished - 1 Oct 2001

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