Gauge Coupling Unification in MSSM + 5 Flavors

Details Gauge Coupling Unification in MSSM + 5 Flavors Gauge Coupling Unification in MSSM + 5 Flavors

2008-12-11

arxiv.org/abs/0812.2106v2

Phys.Rev.D79:075009,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 13 figures. Added references, fixed minor typos. No changes to content. Page count was incorrect in v1 Comments

Scientific paper

10.1103/PhysRevD.79.075009

We investigate gauge coupling unification at 2-loops for theories with 5 extra vectorlike SU(5) fundamentals added to the MSSM. This is a borderline case where unification is only predicted in certain regions of parameter space. We establish a lower bound on the scale for the masses of the extra flavors, as a function of the sparticle masses. Models far outside of the bound do not predict unification at all (but may be compatible with unification), and models outside but near the boundary cannot reliably claim to predict it with an accuracy comparable to the MSSM prediction. Models inside the boundary can work just as well as the MSSM.

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