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Observation of B±χc1π± and search for direct CP violation

R. Kumar et al. (Belle Collaboration)
Phys. Rev. D 74, 051103(R) – Published 8 September 2006

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)×105 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)%.

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  • Received 7 July 2006

DOI:https://doi.org/10.1103/PhysRevD.74.051103

©2006 American Physical Society

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Vol. 74, Iss. 5 — 1 September 2006

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