Journal article
Observation of the annihilation decay mode B0→K+K−.
- Abstract:
- A search for the B0→K+K− decay is performed using pp-collision data collected by LHCb. The data set corresponds to integrated luminosities of 1.0 and 2.0 fb^−1 at center-of-mass energies of 7 and 8 TeV, respectively. This decay is observed for the first time, with a significance of more than 5 standard deviations. The analysis also results in an improved measurement of the branching fraction for the B0s→π+π− decay. The measured branching fractions are B(B0→K+K-)=(7.80±1.27±0.81±0.21)×108 and B(B0sπ+π−)=(6.91±0.54±0.63±0.19±0.40)×10^−7. The first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the B0→K+π− branching fraction used as a normalization. For the B0s mode, the fourth accounts for the uncertainty on the ratio of the probabilities for b quarks to hadronize into B0s and B0 mesons.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 330.2KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevlett.118.081801
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 118
- Issue:
- 8
- Pages:
- 081801
- Publication date:
- 2017-02-01
- Acceptance date:
- 2017-01-10
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Pmid:
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28282211
- Language:
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English
- Keywords:
- Pubs id:
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pubs:657207
- UUID:
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uuid:2523d6ec-86ff-4125-b52a-5b5638586552
- Local pid:
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pubs:657207
- Source identifiers:
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657207
- Deposit date:
-
2017-11-03
Terms of use
- Copyright holder:
- CERN, for the LHCb Collaboration
- Copyright date:
- 2017
- Notes:
- © 2017 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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