Possible Explanations for the NuTeV Weinberg Angle Measurement

Abstract

The NuTeV collaboration has made an independent determination of the Weinberg angle by measuring charged and neutral-current cross sections from neutrino and antineutrino DIS on iron. Their value differs by 3 standard deviations from that obtained from measurements at the Z pole. We review this experiment and assess various possible explanations for this result, both within the Standard Model ("old physics") and outside the Standard Model ("new physics").

Comments: QCD Down Under Workshop, CSSM, Adelaide, Australia, Mar 10-19, 2004; 6 pages, 3 figs; updated references on QCD effects