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Title: Observation of the $B_s^0 \to J/\psi K_s^0 K^\pm \pi^\mp$ decay
Author: Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste, E.
Rives, V.
Ruiz, Hugo
LHCb Collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: Jul-2014
Publisher: Springer Verlag
Abstract: Decays of the form B0 (s) → J/ψ K0 S h +h (′)− (h (′) = K, π) are searched for in protonproton collision data corresponding to an integrated luminosity of 1.0 fb−1 recorded with the LHCb detector. The first observation of the B0 s → J/ψ K0 SK±π ∓ decay is reported, with significance in excess of 10 standard deviations. The B0 → J/ψ K0 SK+K− decay is also observed for the first time. The branching fraction of B0 → J/ψ K0 S π +π − is determined, to significantly better precision than previous measurements, using B0 → J/ψ K0 S as a normalisation channel. Branching fractions and upper limits of the other B0 (s) → J/ψ K0 S h +h (′)− modes are determined relative to that of the B0 → J/ψ K0 S π +π − decay.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2014, vol. 2014, num. 140, p. 1-31
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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