Gauge Coupling Unification in MSSM + 5 Flavors

Abstract

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.

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

References in corpus (1)

• Gauge coupling unification, the GUT scale, and magic fields

Cited by in corpus (9)

• Cosmic Signals from the Hidden Sector
• Precision Gauge Unification from Extra Yukawa Couplings
• A Conformal Gauge Mediation and Dark Matter with Only One Parameter
• Relaxing a constraint on the number of messengers in a low-scale gauge mediation
• Semi-direct Gauge Mediation in Conformal Windows of Vector-like Gauge Theories
• LHC Reach of Low Scale Gauge Mediation with Perturbatively Stable Vacuum
• Low-scale Gauge Mediation after LHC Run 2
• Embedding Zprime models in SO(10) GUTs
• String Embeddings of the Pentagon