Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/131786
Title: Measurement of the B0s→J/ψ¯¯¯¯K*0 branching fraction and angular amplitudes
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
Gascón Fora, David
Grabalosa Gándara, Marc
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Pie Valls, B. (Blai)
Potterat, Cédric
Puig Navarro, A.
Roselló, M.
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 1-Oct-2012
Publisher: American Physical Society
Abstract: A sample of 114 ± 11 B 0 s → J / ψ K − π + signal events obtained with 0.37     fb − 1 of p p collisions at √ s = 7     TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the B 0 s → J / ψ ¯¯¯¯ K * 0 decay, with ¯¯¯¯ K * 0 → K − π + . The K − π + mass spectrum of the candidates in the B 0 s peak is dominated by the ¯¯¯¯ K * 0 contribution. Subtracting the nonresonant K − π + component, the branching fraction of B 0 s → J / ψ ¯¯¯¯ K * 0 is ( 4.4 + 0.5 − 0.4 ± 0.8 ) × 10 − 5 , where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K * 0 polarization fractions f L = 0.50 ± 0.08 ± 0.02 and f ∥ = 0.19 + 0.10 − 0.08 ± 0.02 .
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.86.071102
It is part of: Physical Review D, 2012, vol. 86, num. 7, p. 071102
URI: http://hdl.handle.net/2445/131786
Related resource: https://doi.org/10.1103/PhysRevD.86.071102
ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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