Measurement of the CP Asymmetry in B[superscript 0][subscript S] − [bar over B][superscript 0][subscript 0] Mixing
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PhysRevLett.117.061803.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Date Issued
August 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. “Measurement of the C P Asymmetry in B[superscript 0][subscript S] − [bar overB][superscript 0][subscript 0] Mixing.” Physical Review Letters 117.6 (2016): n. pag. © 2016 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
The CP asymmetry in the mixing of B[superscript 0][subscript s] and [bar over B][superscript 0][subscript s] mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb[superscript -1], recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV. Semileptonic B[superscript 0][subscript s] and [bar over B][superscript 0][subscript s] decays are studied in the inclusive mode D[superscript ∓][subscript s]μ[superscript ±][(−) over v][subscript μ]X with the D[superscript ∓][subscript s] mesons reconstructed in the K[superscript +]K[subscript -]π[superscript ∓] final state. Correcting the observed charge asymmetry for detection and background effects, the CP asymmetry is found to be [superscript s][subscript sl] = (0.39±0.26±0.20)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a[subscript s][subscript sl] to date. It is consistent with the prediction from the standard model and will constrain new models of particle physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.117.061803
