Measurement of the oscillation frequency in decays

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 reconstruct...

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Bibliographic Details
Published in:Physics letters. B 2012-03, Vol.709 (3), p.177-184
Main Authors: Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Alkhazov, G, Et. Al
Format: Article
Language:English
Subjects:
Collisions
Decay
Elementary particles
Hadrons
Lead (metal)
Oscillations
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Summary: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 .
ISSN:0370-2693
DOI:10.1016/j.physletb.2012.02.031