LHCb CollaborationCamboni, AlessandroComerma-Montells, A.Garrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasPerez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPotterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vazquez Gomez, R.Abellan Beteta, CarlosCalvo Gomez, M.Oyanguren, A.Ruiz Valls, PabloVilasis-Cardona, X.2022-05-122022-05-122013-051367-2630https://hdl.handle.net/2445/185579A key ingredient to searches for physics beyond the Standard Model in B0s mixing phenomena is the measurement of the B0s- ${{\overline{ {\mathrm {B}}}{}}^0_{\mathrm { s}}}$ oscillation frequency, which is equivalent to the mass difference Δms of the B0s mass eigenstates. Using the world's largest B0s meson sample accumulated in a dataset, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment at the CERN LHC in 2011, a measurement of Δms is presented. A total of about 34 000 B0s → D−sπ+ signal decays are reconstructed, with an average decay time resolution of 44 fs. The oscillation frequency is measured to be Δms = 17.768 ± 0.023 (stat) ± 0.006 (syst) ps−1, which is the most precise measurement to date.16 p.application/pdfeng(c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2013HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6289802022-05-12info:eu-repo/semantics/openAccess