TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
PY  - 2022
DA  - 2022//
TI  - Precise determination of the B-s(0)-B-s(-0) oscillation frequency
T2  - Nat. Phys.
JO  - Nature Physics
SP  - 54
EP  - 58
VL  - 18
PB  - Nature Portfolio
AB  - Mesons comprising a beauty quark and strange quark can oscillate between particle (B-s(0)) and antiparticle (B-s(-0)) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Delta m(s). Here we present a measurement of Delta m(s) using B-s(0) -> 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 m(s) = 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 m(s) precision by a factor of two. We combine this result with previous LHCb measurements to determine Delta m(s) = 17.7656 +/- 0.0057 ps(-1), which is the legacy measurement of the original LHCb detector.
SN  - 1745-2473
UR  - https://arxiv.org/abs/2104.04421
UR  - https://doi.org/10.1038/s41567-021-01394-x
DO  - 10.1038/s41567-021-01394-x
LA  - English
N1  - WOS:000739810100002
ID  - LHCbCollaborationAaij_etal2022
ER  -