Search for the decay of a B0 or B0bar meson to K*0bar K0 or K*0 K0bar

Details Search for the decay of a B0 or B0bar meson to K*0bar K0 or K*0 K0bar Search for the decay of a B0 or B0bar meson to K*0bar K0 or K*0 K0bar

2006-06-21

arxiv.org/abs/hep-ex/0606050v1

Phys.Rev.D74:072008,2006

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 6 postscript figures

Scientific paper

10.1103/PhysRevD.74.072008

We present a search for the decay of a B0 or B0bar meson to a K*0bar K0 or K*0 K0bar final state, using a sample of approximately 232 million BBbar events collected with the BABAR detector at the PEP-II asymmetric energy e+e- collider at SLAC. The measured branching fraction is B(B0 --> K*0bar K0) + B(B0 --> K*0 K0bar) = (0.2+0.9-0.8+0.1-0.3)x 10-6. We obtain the following upper limit for the branching fraction at 90% confidence level: B(B0 --> K*0bar K0) + B(B0 --> K*0 K0bar) <1.9 x 10-6. We use our result to constrain the Standard Model prediction for the deviation of the CP asymmetry in B0 --> phi K0 from sin(2beta).

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