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Title: Observation of the Decay Ξb-→p K-K-
Author: Badalov, Alexey
Calvo Gómez, Míriam
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 16-Feb-2017
Publisher: American Physical Society
Abstract: Decays of the Ξb- and Ωb- baryons to the charmless final states p h-h'- , where h(') denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies √{s }=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1 . The decay Ξb- →p K-K- is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξb- →p K-π- decay. Results are reported, relative to the B- →K+K-K- normalization channel, for the products of branching fractions and b -hadron production fractions. The branching fractions of Ξb- →p K-π- and Ξb- →p π-π- relative to Ξb- →p K-K- decays are also measured.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2017, vol. 118, num. 7, p. 071801
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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