First measurement of the triple-product correlation in polarized Z(sup 0) decays to three jets

摘要

We present the first measurement of the triple-product correlation in polarized Z(sup o) decays to three jets using the SLD detector at SLAC and utilizing a longitudinally polarized electron beam. The CP-even and T-odd triple product (rvec S)(sub z) (center dot) ((rvec k)(sub 1) x (rvec k)(sub 2)) formed from the two fastest jet momenta (rvec k)(sub 1) and (rvec k)(sub 2) and the Z(sup o) polarization vector (rvec S)(sub z) is sensitive to physics beyond the Standard Model. We measure the expectation value of this quantity to be consistent with zero and set an upper limit on correlations between the Z(sup 0)-spin and the three-jet plane orientation.