Adeva Andany, BernardoMartinez Santos, DiegoGeorgieva Chobanova, VeronikaRomero Lamas, Marcos2023-03-202023http://hdl.handle.net/10347/30359A measurement of the mixing-induced CP violation phase in the bottomstrange meson system and its oscillation parameters through the dimuon (after a charmonium decay) and dikaon decay mode is reported. The weak phase difference is precisely constrained within the Standard Model, constituting a key probe for new physics phenomena. This preliminary analysis uses 6/fb of 13 TeV proton-proton collisions at LHCb and constitutes the world's most precise measurement of the CP violation phase, the decay width, and the decay-width splitting of the bottom-strange meson. In a flavor-tagged time-dependent angular fit to about half a million signal candidates of background subtracted data, a statistical uncertainty of 22 mrad in the CP violating phase is achieved.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/flavorphysicsparticlemesonoscillationsCP violationbottom-strangeMaterias::Investigación::22 Física::2207 Física atómica y nuclear::220799 Otras (Física nuclear experimental altas energías)Materias::Investigación::22 Física::2290 Física altas energías::229001 Física teórica altas energíasdoctoral thesisopen access