Observation of B0 s→K 7 K ∓ and evidence for B0 s→K − π + decays
Measurements of the branching fractions of → ± ∓ B KK * s 0 and → π± ∓ B K* s 0 decays are performed using a data sample corresponding to − 1.0 fb 1 of protonproton collision data collected with the LHCb detector at a centre-of-mass energy of 7 TeV, where the ± K* mesons are reconstructed in the π±...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2014 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:20.500.14342/3296 |
| Online Access: | http://hdl.handle.net/20.500.14342/3296 https://doi.org/10.1088/1367-2630/16/12/123001 |
| Access Level: | Open access |
| Keyword: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) Protons 539 |
| Summary: | Measurements of the branching fractions of → ± ∓ B KK * s 0 and → π± ∓ B K* s 0 decays are performed using a data sample corresponding to − 1.0 fb 1 of protonproton collision data collected with the LHCb detector at a centre-of-mass energy of 7 TeV, where the ± K* mesons are reconstructed in the π± KS 0 final state. The first observation of the → ± ∓ B KK * s 0 decay and the first evidence for the → π− + B K* s 0 decay are reported with branching fractions π → = ±± × → = ±± × ±∓ − − + − ( ) ( ) B KK B K * (12.7 1.9 1.9) 10 , * (3.3 1.1 0.5) 10 , s s 0 6 0 6 where the first uncertainties are statistical and the second are systematic. In addition, an upper limit of →<× ±∓ − ( ) B KK * 0.4 (0.5) 10 0 6 is set at 90% (95%) confidence level. |
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