Old and new physics interpretations of the NuTeV anomaly
Abstract
We discuss whether the NuTeV anomaly can be explained, compatibly with all other data, by QCD effects (maybe, if the strange sea is asymmetric, or there is a tiny violation of isospin), new physics in propagators or couplings of the vector bosons (not really), loops of supersymmetric particles (no), dimension six operators (yes, for one specific SU(2)-invariant operator), leptoquarks (not in a minimal way), extra U(1) gauge bosons (maybe: an unmixed Z' coupled to B-3L_mu also increases the muon g-2 by about 10^{-9} and gives a `burst' to cosmic rays above the GZK cutoff).
Keywords
Cite
@article{arxiv.hep-ph/0112302,
title = {Old and new physics interpretations of the NuTeV anomaly},
author = {S. Davidson and S. Forte and P. Gambino and N. Rius and A. Strumia},
journal= {arXiv preprint arXiv:hep-ph/0112302},
year = {2009}
}
Comments
22 pages, 4 figures. Final version; note added about oscillations. Version 4: note added at page 20 (not present in the published version), about QCD interpretations of the NuTeV anomaly