Precise determination of the B0 s –B 0 s oscillation frequency

Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s) and antiparticle (B0s) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Delta(ms). Here we present a measurement of Delta(ms) using B0s --> D−s pi+ d...

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Detalhes bibliográficos
Autores: LHCb collaboration, Aaij, R., Adeva Andany, Bernardo, Baladrón Rodríguez, Pablo, Boente García, Óscar, Brea Rodríguez, Alexandre, Casais Vidal, Adrián, Chobanova, Veronika, Cid Vidal, Xabier, Dalseno, Jeremy, Dieste Maronas, L., Fernández Prieto, Antonio, Gallas Torreira, Abraham, Garcia Plana, Beatriz, Gioventù, Alessandra, Lomba Castro, Julián, Martínez Santos, Diego, Parkinson, C. J., Pló Casasús, Máximo, Prouve, Claire, Romero Lamas, Marcos, Romero Vidal, Antonio, Saborido Silva, Juan José, Santamarina Ríos, Cibrán, Sellam, Sara, Vázquez Gómez, Ricardo, Vázquez Regueiro, Pablo, Álvarez Cartelle, Paula, Borsato, Martino, Vieites Díaz, María
Formato: artículo
Fecha de publicación:2022
País:España
Recursos:Universidad de Santiago de Compostela (USC)
Repositorio:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglés
OAI Identifier:oai:minerva.usc.gal:10347/45041
Acesso em linha:https://hdl.handle.net/10347/45041
Access Level:acceso abierto
Palavra-chave:Flavour Physics
B-meson oscillation frequency
Hadron colliders
2290 Física altas energías
Descrição
Resumo:Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s) and antiparticle (B0s) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Delta(ms). Here we present a measurement of Delta(ms) using B0s --> D−s pi+ decays produced in proton–proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be Delta(ms) = 17.7683±0.0051±0.0032 ps−1, where the first uncertainty is statistical and the second is systematic. This measurement improves on the current Delta(ms) precision by a factor of two. We combine this result with previous LHCb measurements to determine Delta(ms) = 17.7656±0.0057 ps−1, which is the legacy measurement of the original LHCb detector

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