RT Journal Article
T1 Precise determination of the B0 s –B 0 s oscillation frequency
A1 LHCb collaboration, 
A1 Aaij, R.
A1 Adeva Andany, Bernardo
A1 Baladrón Rodríguez, Pablo
A1 Boente García, Óscar
A1 Brea Rodríguez, Alexandre
A1 Casais Vidal, Adrián
A1 Chobanova, Veronika
A1 Cid Vidal, Xabier
A1 Dalseno, Jeremy
A1 Dieste Maronas, L.
A1 Fernández Prieto, Antonio
A1 Gallas Torreira, Abraham
A1 Garcia Plana, Beatriz
A1 Gioventù, Alessandra
A1 Lomba Castro, Julián
A1 Martínez Santos, Diego
A1 Parkinson, C. J.
A1 Pló Casasús, Máximo
A1 Prouve, Claire
A1 Romero Lamas, Marcos
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Santamarina Ríos, Cibrán
A1 Sellam, Sara
A1 Vázquez Gómez, Ricardo
A1 Vázquez Regueiro, Pablo
A1 Álvarez Cartelle, Paula
A1 Borsato, Martino
A1 Vieites Díaz, María
K1 Flavour Physics
K1 B-meson oscillation frequency
K1 Hadron colliders
AB 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
PB Springer Nature
YR 2022
FD 2022-01-06
LK https://hdl.handle.net/10347/45041
UL https://hdl.handle.net/10347/45041
LA eng
NO LHCb 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
NO We 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)
DS Minerva
RD 25 may 2026