Gauge coupling flux thresholds, exotic matter and the unification scale in F-SU(5) GUT

Details Gauge coupling flux thresholds, exotic matter and the unification scale in F-SU(5) GUT Gauge coupling flux thresholds, exotic matter and the unification scale in F-SU(5) GUT

2009-12-08

arxiv.org/abs/0912.1557v3

Eur.Phys.J.C67:489-498,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 3 figures, references and extended comments on KK thresholds effects added

Scientific paper

10.1140/epjc/s10052-010-1298-2

We explore the gauge coupling relations and the unification scale in F-theory SU(5) GUT broken down to the Standard Model by an internal U(1)Y gauge flux. We consider variants with exotic matter representations which may appear in these constructions and investigate their role in the effective field theory model. We make a detailed investigation on the conditions imposed on the extraneous matter to raise the unification scale and make the color triplets heavy in order to avoid fast proton decay. We also discuss in brief the implications on the gaugino masses.

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