Search for mixing-induced CP violation using partial reconstruction of [bar over B][superscript 0] → D[superscript *+]}Xℓ[superscript -][bar over ν][subscript ℓ]and kaon tagging
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PhysRevD.93.032001.pdf
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Date Issued
February 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. "Search for mixing-induced CP violation using partial reconstruction of [bar over B][superscript 0] → D[superscript *+]}Xℓ[superscript -][bar over ν][subscript ℓ]and kaon tagging." Phys. Rev. D 93, 032001 (February 2016). © 2016 American Physical Society
Version
Final published version
Abstract
We describe in detail a previously published measurement of CP violation in B[superscript 0]-[bar over B][superscript 0] oscillations, based on an integrated luminosity of 425.7 fb[superscript -1] collected by the BABAR experiment at the PEPII collider. We apply a novel technique to a sample of about 6 million [bar over B][superscript 0] → D[superscript *+]ℓ[superscript -][bar over ν][subscript ℓ] decays selected with partial reconstruction of the D[superscript *+] meson. The charged lepton identifies the flavor of one B meson at its decay time, the flavor of the other B is determined by kaon tagging. We determine a CP violating asymmetry A[subscript CP] = (N(B[superscript 0]B[superscript 0]) - N([bar over B][superscript 0][bar over B][superscript 0]))/(N(B[superscript 0]B[superscript 0]) + N([bar over B][superscript 0][bar over B][superscript 0])) = (0.06 ± 0.17[+0.38 over -0.32])% corresponding to Δ[subscript CP] = 1 - |q/p| = (0.29 ± 0.84[+1.88 over -1.61]) × 10[superscript -3]. This measurement is consistent and competitive with those obtained at the B factories with dilepton events.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.93.032001
