Search for CP Violation in the Decay Z -> b (b bar) g

Abstract

About three million hadronic decays of the Z collected by ALEPH in the years 1991-1994 are used to search for anomalous CP violation beyond the Standard Model in the decay Z -> b \bar{b} g. The study is performed by analyzing angular correlations between the two quarks and the gluon in three-jet events and by measuring the differential two-jet rate. No signal of CP violation is found. For the combinations of anomalous CP violating couplings, ${\hat{h}}_b={\hat{h}}_{Ab}{g}_{Vb}-{\hat{h}}_{Vb}{g}_{Ab}$ and $h_b^{\ast }=\sqrt{{\hat{h}}_{Vb}^2+{\hat{h}}_{Ab}^2}$, limits of \hat{h}_b < 0.59$and$h^{\ast}_{b} < 3.02$ are given at 95\% CL.

8 pages, 1 postscript figure, uses here.sty, epsfig.sty

References in corpus (1)

• Five Jet Production with Heavy Quarks at $e^{+}{e}^{-}$ Colliders