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Aaij, R; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M; Alkhazov, G; Et. Al
Physics letters. B, 03/2012, Letnik: 709, Številka: 3Journal Article
The B s 0 - B macr s 0 oscillation frequency Delta m s 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 B s 0 arrow right D s - pi + and B s 0 arrow right D s - 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 m s = 17.63 +/- 0.11 ( stat ) +/- 0.02 ( syst ) ps - 1 .
