Gauge Coupling Unification in GUT with Anomalous U(1) Symmetry

Details Gauge Coupling Unification in GUT with Anomalous U(1) Symmetry Gauge Coupling Unification in GUT with Anomalous U(1) Symmetry

2002-09-19

arxiv.org/abs/hep-ph/0209217v2

Phys.Rev.Lett. 90 (2003) 121801

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, RevTeX, to appear in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.90.121801

We show that in the framework of grand unified theory (GUT) with anomalous $U(1)_A$ gauge symmetry, the success of the gauge coupling unification in the minimal SU(5) GUT is naturally explained, even if the mass spectrum of superheavy fields does not respect SU(5) symmetry. Because the unification scale for most realizations of the theory becomes smaller than the usual GUT scale, it suggests that the present level of experiments is close to that sufficient to observe proton decay via dimension 6 operators, $p\to e+\pi$.

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