Gauge Model of Quark-Lepton Nonuniversality

Details Gauge Model of Quark-Lepton Nonuniversality Gauge Model of Quark-Lepton Nonuniversality

2002-12-02

arxiv.org/abs/hep-ph/0212029v1

Mod.Phys.Lett.A18:1367-1376,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure

Scientific paper

10.1142/S0217732303011137

We propose a gauge model where quark-lepton universality is an accidental symmetry which is only approximate, in analogy to the well-accepted notion that strong isospin is accidental and approximate. This is a natural framework for explaining possible small deviations of quark-lepton universality which is applicable to the recently reported apparent nonunitarity of the quark mixing matrix. As a result, small departures from quark-lepton universality are expected in Z decays as well as in the recent neutrino data of the NuTeV collaboration and in future low-energy experiments. New physics is predicted at the TeV scale.

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