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2 Measurements of B-0(B)over-bar(0) mixing
Ammar, Raymond G. Ball, S. Baringer, Philip S. Coppage, Don Copty, N. Davis, Robin E. P. Hancock, N. Kelly, M. Kwak, Nowhan Lam, H.
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
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Abstract
We have measured the B0B0BAR mixing probability, chi(d), using a sample of 965000 BBBAR pairs from UPSILON(4S) decays. Counting dilepton events, we find chi(d) = 0.157 +/- 0.016 +/- 0.018(-0.021)+0.028. Using tagged B0 events, we find chi(d) = 0.149 +/- 0.023 +/- 0.019 +/- 0.010. The first (second) error is statistical (systematic). The third error reflects a +/- 15% uncertainty in the assumption, made in both cases, that charged and neutral B pairs contribute equally to dilepton events. We also obtain a limit on the CP impurity in the B(d)0 system, \Re(epsilon(B)0)\ < 0.045 at 90% C.L.
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1993-09
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AMERICAN PHYSICAL SOC
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BARTELT, J, CSORNA, SE, et al. 2 MEASUREMENTS OF B(0)(B)OVER-BAR-0 MIXING. PHYSICAL REVIEW LETTERS. September 1993. 71(11) : 1680-1684