Precision measurement of the B[0 over s]–[– over B][0 over s] oscillation frequency with the decay B[0 over s]→D[– over s]π[superscript +]
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Aaij-2013-Precision measuremen.pdf
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Author(s)
Williams, Mateo S.
Date Issued
May 2013
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Aaij, R, C Abellan Beteta, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, et al. “Precision measurement of the B[0 over s]–[– over B][0 over s] oscillation frequency with the decay B[0 over s]→D[– over s]π[superscript +].” New Journal of Physics 15, no. 5 (May 1, 2013): 053021. © CERN 2013
Version
Final published version
Abstract
A key ingredient to searches for physics beyond the Standard Model in B[0 over s] mixing phenomena is the measurement of the B[0 over s]–[– over B][0 over s] oscillation frequency, which is equivalent to the mass difference Δm[subscript s] of the B[0 over s] mass eigenstates. Using the world's largest B[0 over s] meson sample accumulated in a dataset, corresponding to an integrated luminosity of 1.0 fb[superscript −1], collected by the LHCb experiment at the CERN LHC in 2011, a measurement of Δm[subscript s] is presented. A total of about 34 000 B[0 over s] → D[− over s]π[superscript +] signal decays are reconstructed, with an average decay time resolution of 44 fs. The oscillation frequency is measured to be Δm[subscript s] = 17.768 ± 0.023 (stat) ± 0.006 (syst) ps[superscript −1], which is the most precise measurement to date.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1088/1367-2630/15/5/053021
