Bounds on the CP Asymmetry in Like-Sign Dileptons from $B^{0}\bar{B}^{0}$ Meson Decays

Details Bounds on the CP Asymmetry in Like-Sign Dileptons from $B^{0}\bar{B}^{0}$ Meson Decays Bounds on the CP Asymmetry in Like-Sign Dileptons from $B^{0}\bar{B}^{0}$ Meson Decays

2001-01-08

arxiv.org/abs/hep-ex/0101006v2

Phys.Rev.Lett.86:5000-5003,2001

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevLett.86.5000

We have measured the charge asymmetry in like-sign dilepton yields from B^0 B^0-bar meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a_ll = [N(l+l+) - N(l-l-)]/[N(l+l+) + N[l-l-)] = +0.013 +/- 0.050 +/- 0.005 . We combine this result with a previous, independent measurement and obtain Re(epsilon_B)/(1+|epsilon_B|^2) = +0.0035 +/- 0.0103 +/- 0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon_B.

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