First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK + μ + μ −
First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK +μ+μ− are presented using data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fractions of the decays are B(B+→K+π+π−μ+μ−)=(4....
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3193 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3193 https://doi.org/10.1007/JHEP10(2014)064 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) 539 |
| Sumario: | First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK +μ+μ− are presented using data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fractions of the decays are B(B+→K+π+π−μ+μ−)=(4.36−0.29−0.27(stat)±0.21 (syst)±0.18(norm))×10−7,B(B+→ϕK+μ+μ−)=(0.82−0.19−0.17(stat)−0.10−0.04(syst)±0.27(norm))×10−7, where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay B + → K + π + π − μ + μ −. |
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