The SLD Asymmetry in View of the LEP Results

Abstract

LEP determines ${\sin }^2{\theta }_{\mathrm{eff}}$, by combining the various asymmetry measurements to be $0.2321\pm 0.0005$. On the other hand, the left-right asymmetry as measured at SLC corresponds to \seff = $0.2292\pm 0.0010$. I will discuss the possibilities of this being i) a statistical fluctuation, ii) a hint for New Physics or iii) an experimental discrepancy.

Comments: 6 pages, UPR-0619T