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Observation of B0D¯0K+K and Evidence for Bs0D¯0K+K

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 109, 131801 – Published 26 September 2012

Abstract

The first observation of the decay B0D¯0K+K is reported from an analysis of 0.62fb1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0D¯0π+π to be B(B0D¯0K+K)B(B0D¯0π+π)=0.056±0.011±0.007,where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8σ. Evidence, with 3.8σ significance, for Bs0D¯0K+K decays is also presented. The relative branching fraction is measured to be B(Bs0D¯0K+K)B(B0D¯0K+K)=0.90±0.27±0.20. These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for CP violation analyses with larger data sets.

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  • Received 26 July 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.131801

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2012 CERN, for the LHCb Collaboration

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Vol. 109, Iss. 13 — 28 September 2012

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