Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133451
Title: First Observation of the Decay B∗s2(5840)0→B*+K− and Studies of Excited B0s Mesons
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
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
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 9-Apr-2013
Publisher: American Physical Society
Abstract: The properties of the orbitally excited ( L = 1 ) B 0 s states are studied by using 1.0     fb − 1 of p p collisions at √ s = 7     TeV collected with the LHCb detector. The first observation of the B ∗ s 2 ( 5840 ) 0 meson decaying to B * + K − is reported, and the corresponding branching fraction measured relative to the B + K − decay mode. The B s 1 ( 5830 ) 0 → B * + K − decay is observed as well. The width of the B ∗ s 2 ( 5840 ) 0 state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the B ∗ s 2 ( 5840 ) 0 → B * + K − decay favors the spin-parity assignment J P = 2 + for the B ∗ s 2 ( 5840 ) 0 meson. In addition, the most precise measurement of the mass difference m ( B * + ) − m ( B + ) = 45.01 ± 0.30 ( stat ) ± 0.23 ( syst )     MeV / c 2 is obtained.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.110.151803
It is part of: Physical Review Letters, 2013, vol. 110, num. 15, p. 151803
URI: http://hdl.handle.net/2445/133451
Related resource: https://doi.org/10.1103/PhysRevLett.110.151803
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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