Measurement of the B0s - B0s oscillation frequency Delta ms in B0s -> Ds-(3) pi decays
Abstract
The B0s-B0s oscillation frequency Delta ms is measured with 36 pb-1 of data collected in pp collisions at s = 7 TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381 B0s -> Ds- π+ and 0s -> Ds- pi+ pi- pi+ signal decays are reconstructed, with average decay time resolutions of 44 fs and 36 fs, respectively. An oscillation signal with a statistical significance of 4.6 sigma is observed. The measured oscillation frequency is Delta ms = 17.63 0.11 (stat) 0.02 (syst) ps-1.
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