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- W1569296913 abstract "We report the first observation of B±→χc1π±, a Cabibbo- and color-suppressed decay in a data sample of 386×106 BB¯ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe 55±10 signal events with a statistical significance of 6.3σ including systematic uncertainties. The measured branching fraction and charge-asymmetry is B(B±→χc1π±)=(2.2±0.4±0.3)×10−5 and Aπ=0.07±0.18±0.02, respectively. We also determine the ratio B(B±→χc1π±)/B(B±→χc1K±)=(4.3±0.8±0.3)%.Received 7 July 2006DOI:https://doi.org/10.1103/PhysRevD.74.051103©2006 American Physical Society" @default.
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