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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, Albert 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 (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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