First Measurement of the T-odd Correlation between the Z0 Spin and the Three-jet Plane Orientation in Polarized Z0 Decays to Three Jets

Abstract

We present the first measurement of the correlation between the $Z^0$ spin and the three-jet plane orientation in polarized $Z^0$ decays into three jets in the SLD experiment at SLAC utilizing a longitudinally polarized electron beam. The CP-even and T-odd triple product $\overrightarrow{S_Z}\cdot (\overrightarrow{k_1}\times \overrightarrow{k_2})$ formed from the two fastest jet momenta, $\overrightarrow{k_1}$ and $\overrightarrow{k_2}$, and the $Z^0$ polarization vector $\overrightarrow{S_Z}$, is sensitive to physics beyond the Standard Model. We measure the expectation value of this quantity to be consistent with zero and set 95\% C.L. limits of $-0.022<\beta <0.039$ on the correlation between the $Z^0$-spin and the three-jet plane orientation.

15 pages, LaTex, 2 figures

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