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Old and new physics interpretations of the NuTeV anomaly

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Old and new physics interpretations of the NuTeV anomaly

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Davidson, Sacha; Forte, Stefano; Gambino, Paolo; Rius Dionis, Nuria; Strumia, Alessandro

Aquest document és un/a article, creat/da en: 2002

We discuss whether the NuTeV anomaly can be explained, compatibly with all other data, by QCD erects (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)(L)-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).

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