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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/133580
Observation of B0→¯¯¯D0K+K− and Evidence for B0s→¯¯¯D0K+K−
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The first observation of the decay B 0 → ¯¯¯ D 0 K + K − is reported from an analysis of 0.62 fb − 1 of p p collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B 0 → ¯¯¯ D 0 π + π − to be B ( B 0 → ¯¯¯ D 0 K + K − ) B ( B 0 → ¯¯¯ D 0 π + π − ) = 0.056 ± 0.011 ± 0.007 , where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8 σ . Evidence, with 3.8 σ significance, for B 0 s → ¯¯¯ D 0 K + K − decays is also presented. The relative branching fraction is measured to be B ( B 0 s → ¯¯¯ D 0 K + K − ) B ( B 0 → ¯¯¯ D 0 K + 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 C P violation analyses with larger data sets.
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ABELLAN BETETA, Carlos, et al. Observation of B0→¯¯¯D0K+K− and Evidence for B0s→¯¯¯D0K+K−. Physical Review Letters. 2012. Vol. 109, num. 13, pags. 131801. ISSN 0031-9007. [consulted: 8 of June of 2026]. Available at: https://hdl.handle.net/2445/133580