Journal article
Observation of the decay Λb0 → pK−μ+μ− and a search for CP violation
- Abstract:
- A search for CP violation in the decay Λb0 → pK−μ+μ− is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb^−1. The Λb0 → pK−μ+μ− decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, ΔACP ≡ ACP(Λ0b→pK−μ+μ−) − ACP(Λ0b→pK−J/ψ) and a aT-odd/CP, where the latter is based on asymmetries in the angle between the μ+μ− and pK− decay planes. These are measured to be ΔACP = (−3.5 ±5.0(stat) ±0.2(syst))×10^−2, aT-odd/CP = (1.2 ±5.0 (stat) ±0.7 (syst))×10^−2,and no evidence for CP violation is found.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Publisher copy:
- 10.1007/JHEP06(2017)108
Authors
- Publisher:
- Springer
- Journal:
- Journal of High Energy Physics More from this journal
- Volume:
- 2017
- Issue:
- 6
- Pages:
- 108
- Publication date:
- 2017-06-01
- Acceptance date:
- 2017-05-25
- DOI:
- EISSN:
-
1029-8479
- Keywords:
- Pubs id:
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pubs:685286
- UUID:
-
uuid:fe41638f-99e1-4a64-af53-aa932b36ab6d
- Local pid:
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pubs:685286
- Source identifiers:
-
685286
- Deposit date:
-
2017-11-03
Terms of use
- Copyright holder:
- CERN, for the benefit of the LHCb Collaboration
- Copyright date:
- 2017
- Notes:
- Copyright CERN, for the benefit of the LHCb Collaboration. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
- Licence:
- CC Attribution (CC BY)
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