Abellan Beteta, CarlosCalvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertDomingo Bonal, FrancescGarrido Beltrán, LluísGrabalosa Gándara, MarcGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasPérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPie Valls, B. (Blai)Potterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2019-05-202019-05-202013-04-090031-9007https://hdl.handle.net/2445/133451The 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.9 p.application/pdfengcc by (c) CERN; LHCb Collaboration, 2013http://creativecommons.org/licenses/by/3.0/es/Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article6196492019-05-20info:eu-repo/semantics/openAccess