Journal article
Searches for Λ0 b and Ξ0 b decays to K0 S pπ− and K0 S pK− final states with first observation of the Λ0 b → K0 S pπ− decay
- Abstract:
- A search for previously unobserved decays of beauty baryons to the final states K0 spπ- and K0 spK- is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb- of pp collisions. The Λ0 b → ̄K pπ- decay is observed with a significance of 8.6σ, with branching fraction (Equation Presented), where the uncertainties are statistical, systematic, from the ratio of fragmentation fractions f Λ 0 b/fd, and from the branching fraction of the B0 → K0π+π - normalisation channel, respectively. A first measurement is made of the CP asymmetry, giving (Equation Presented). No significant signals are seen for Λ0 b → K0 spK - decays, Ξ0 b decays to both the K 0 spπ- and K0 spK - final states, and the Λ0 b → D- s(→ K0 sK-)p decay, and upper limits on their branching fractions are reported.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 795.6KB, Terms of use)
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- Publisher copy:
- 10.1007/JHEP04(2014)087
Authors
Contributors
Perez Trigo, E
- Publisher:
- Springer Berlin Heidelberg
- Journal:
- Journal of High Energy Physics More from this journal
- Volume:
- 2014
- Issue:
- 4
- Article number:
- 87
- Publication date:
- 2014-01-01
- DOI:
- EISSN:
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1029-8479
- ISSN:
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1029-8479
- Keywords:
- Pubs id:
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pubs:466951
- UUID:
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uuid:1ba1cae4-b071-4215-ab0b-2a455169a7e5
- Local pid:
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pubs:466951
- Source identifiers:
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466951
- Deposit date:
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2014-08-20
Terms of use
- Copyright holder:
- CERN, for the benefit of the LHCb Collaboration
- Copyright date:
- 2014
- Notes:
-
Copyright © 2014 CERN,
for the benefit of the LHCb Collaboration.
Article funded by SCOAP3. 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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