Badalov, AlexeyCalvo Gómez, MíriamGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vilasis-Cardona, XavierLHCb Collaboration2019-05-152019-05-152014-10-140031-9007https://hdl.handle.net/2445/133202The resonant substructure of B 0 s → ¯ D 0 K − π + decays is studied using a data sample corresponding to an integrated luminosity of 3.0     fb − 1 of p p collision data recorded by the LHCb detector. An excess at m ( ¯ D 0 K − ) ≈ 2.86     GeV / c 2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the D ∗ s J ( 2860 ) − state previously observed in inclusive e + e − → ¯ D 0 K − X and p p → ¯ D 0 K − X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the D ∗ s 2 ( 2573 ) − meson are measured, giving the most precise determinations to date.9 p.application/pdfengcc by (c) CERN; LHCb Collaboration, 2014http://creativecommons.org/licenses/by/3.0/es/Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article6457302019-05-15info:eu-repo/semantics/openAccess