Journal article
Measurement of the B0s→μ+μ− branching fraction and effective lifetime and search for B0→μ+μ−decays.
- Abstract:
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A search for the rare decays B0s→μ+μ− and B0→μ+μ− is performed at the LHCb experiment using data collected in pp collisions corresponding to a total integrated luminosity of 4.4 fb−1. An excess of B0s→μ+μ− decays is observed with a significance of 7.8 standard deviations, representing the first observation of this decay in a single experiment. The branching fraction is measured to be B(B0s→μ+μ−)=(3.0±0.6+0.3−0.2)×10^−9, where the first uncertainty is statistical and the second systematic. The first measurement of the B0s→μ+μ− effective lifetime, τ(B0s→μ+μ−)=2.04±0.44±0.05 ps, is reported. No significant excess of B0→μ+μ− decays is found, and a 95% confidence level upper limit, B(B0→μ+μ−)<3.4×10^−10, is determined. All results are in agreement with the standard model expectations.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 334.4KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevlett.118.191801
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 118
- Issue:
- 19
- Pages:
- 191801
- Publication date:
- 2017-05-01
- Acceptance date:
- 2017-04-03
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Pmid:
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28548525
- Language:
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English
- Keywords:
- Pubs id:
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pubs:687100
- UUID:
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uuid:bbd2eabc-d63b-4e54-a92d-7abf52b3a23b
- Local pid:
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pubs:687100
- Source identifiers:
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687100
- Deposit date:
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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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