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

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dc.contributor.affiliationUniversidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
dc.contributor.authorLHCb collaboration
dc.contributor.authorAaij, R.
dc.contributor.authorAdeva Andany, Bernardo
dc.contributor.authorBaladrón Rodríguez, Pablo
dc.contributor.authorBoente García, Óscar
dc.contributor.authorBrea Rodríguez, Alexandre
dc.contributor.authorCasais Vidal, Adrián
dc.contributor.authorChobanova, Veronika
dc.contributor.authorCid Vidal, Xabier
dc.contributor.authorDalseno, Jeremy
dc.contributor.authorDieste Maronas, L.
dc.contributor.authorFernández Prieto, Antonio
dc.contributor.authorGallas Torreira, Abraham
dc.contributor.authorGarcia Plana, Beatriz
dc.contributor.authorGioventù, Alessandra
dc.contributor.authorLomba Castro, Julián
dc.contributor.authorMartínez Santos, Diego
dc.contributor.authorParkinson, C. J.
dc.contributor.authorPló Casasús, Máximo
dc.contributor.authorProuve, Claire
dc.contributor.authorRomero Lamas, Marcos
dc.contributor.authorRomero Vidal, Antonio
dc.contributor.authorSaborido Silva, Juan José
dc.contributor.authorSantamarina Ríos, Cibrán
dc.contributor.authorSellam, Sara
dc.contributor.authorVázquez Gómez, Ricardo
dc.contributor.authorVázquez Regueiro, Pablo
dc.contributor.authorÁlvarez Cartelle, Paula
dc.contributor.authorBorsato, Martino
dc.contributor.authorVieites Díaz, María
dc.date.accessioned2026-01-12T13:12:29Z
dc.date.available2026-01-12T13:12:29Z
dc.date.issued2022-01-06
dc.description.abstractMesons 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
dc.description.peerreviewedSI
dc.description.sponsorshipWe acknowledge support from CERN and from the following national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (UK); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (UK), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Leverhulme Trust, the Royal Society and UKRI (UK)
dc.identifier.citationLHCb collaboration. Precise determination of the B0 s –B 0 s oscillation frequency. Nat. Phys. 18, 1–5 (2022). https://doi.org/10.1038/s41567-021-01394-x
dc.identifier.doi10.1038/s41567-021-01394-x
dc.identifier.essn1745-2481
dc.identifier.urihttps://hdl.handle.net/10347/45041
dc.journal.titleNature Physics
dc.language.isoeng
dc.page.final58
dc.page.initial54
dc.publisherSpringer Nature
dc.relation.publisherversionhttps://doi.org/10.1038/s41567-021-01394-x
dc.rights© 2026 Springer Nature Limited. This article is licensed under a Creative Commons Attribution 4.0 International License
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectFlavour Physics
dc.subjectB-meson oscillation frequency
dc.subjectHadron colliders
dc.subject.classification2290 Física altas energías
dc.titlePrecise determination of the B0 s –B 0 s oscillation frequency
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number18
dspace.entity.typePublication
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