TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
PY  - 2013
DA  - 2013//
TI  - Precision measurement of the B-s(0)-(B)over-bar(s)(0) oscillation frequency with the decay B-s(0) -> D-s(-)pi(+)
T2  - New J. Phys.
JO  - New Journal of Physics
SP  - 053021
EP  - 15pp
VL  - 15
PB  - Iop Publishing Ltd
AB  - A key ingredient to searches for physics beyond the Standard Model in B-s(0) mixing phenomena is the measurement of the B-s(0)-(B) over bar (0)(s) oscillation frequency, which is equivalent to the mass difference Delta m(s) of the B-s(0) mass eigenstates. Using the world's largest B-s(0) meson sample accumulated in a dataset, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb experiment at the CERN LHC in 2011, a measurement of Delta m(s) is presented. A total of about 34 000 B-s(0) -> D-s(-)pi(+) signal decays are reconstructed, with an average decay time resolution of 44 fs. The oscillation frequency is measured to be Delta m(s) = 17.768 +/- 0.023 (stat) +/- 0.006 (syst) ps(-1), which is the most precise measurement to date.
SN  - 1367-2630
UR  - http://arxiv.org/abs/arXiv:1304.4741
UR  - https://doi.org/10.1088/1367-2630/15/5/053021
DO  - 10.1088/1367-2630/15/5/053021
LA  - English
N1  - WOS:000318853200001
ID  - LHCbCollaborationAaij_etal2013
ER  -