Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132875
Title: Observation of the B0s→η′η′ Decay
Author: Badalov, Alexey
Calvo Gómez, Míriam
Casanova Mohr, Raimon
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 28-Jul-2015
Publisher: American Physical Society
Abstract: The first observation of the B 0 s → η ′ η ′ decay is reported. The study is based on a sample of proton-proton collisions corresponding to 3.0     fb − 1 of integrated luminosity collected with the LHCb detector. The significance of the signal is 6.4 standard deviations. The branching fraction is measured to be [ 3.31 ± 0.64 ( stat ) ± 0.28 ( syst ) ± 0.12 ( norm ) ] × 10 − 5 , where the third uncertainty comes from the B ± → η ′ K ± branching fraction that is used as a normalization. In addition, the charge asymmetries of B ± → η ′ K ± and B ± → ϕ K ± , which are control channels, are measured to be ( − 0.2 ± 1.3 ) % and ( + 1.7 ± 1.3 ) % , respectively. All results are consistent with theoretical expectations.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.115.051801
It is part of: Physical Review Letters, 2015, vol. 115, num. 5, p. 051801
URI: http://hdl.handle.net/2445/132875
Related resource: https://doi.org/10.1103/PhysRevLett.115.051801
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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