Measurements of B Decays to Two Kaons

Abstract

We report measurements of B meson decays to two kaons using 250/fb of data collected with the Belle detector at the KEKB asymmetric energy e+ e- collider. We find evidence of signals in B+ -> K0(bar) K+ and B0 -> K0 K0(bar) with significances of 3.0 sigma and 3.5 sigma, respectively. The corresponding branching fractions are measured to be BF(B+ -> K0(bar) K+) = (1.0+-0.4+-0.1) x 10^-6 and Br(B0 -> K0 K0(bar)) = 0.8+-0.3+-0.1) x 10^-6. These decay modes are examples of hadronic b -> d transitions. No signal is observed in the decay B0 -> K+ K- and we set an upper limit of 3.7 x 10^-7 at 90% confidence level.

8 pages, 1 figure, submitted to the Lepton Photon 2005 conference in Uppsala, Sweden and to the HEP2005 Europhysics Conference in Lisbon, Portugal Submitted to PRL

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Cited by in corpus (6)

• The Physics of the B Factories
• Observation of B+ --> K0bar K+ and B0 --> K0 K0bar
• Final State Interaction In $B\to KK$ Decays
• Improved Measurements of the Branching Fractions for B0 --> pi+pi- and B0 --> K+pi-, and a Search fro B0 --> K+K-
• Observation of B Decays to Two Kaons
• Sum rules for B-->pi eta('), K eta('), eta(') eta(') decays