Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-14
Phys.Rev.D81:025008,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 20 pages, 8 figures, 1 table
Scientific paper
10.1103/PhysRevD.81.025008
We investigate constraints that the requirements of perturbativity and gauge coupling unification impose on extensions of the Standard Model and of the MSSM. In particular, we discuss the renormalization group running in several SUSY left-right symmetric and Pati-Salam models and show how the various scales appearing in these models have to be chosen in order to achieve unification. We find that unification in the considered models occurs typically at scales below M^{min}_{B violation} = 10^16 GeV, implying potential conflicts with the non-observation of proton decay. We emphasize that extending the particle content of a model in order to push the GUT scale higher or to achieve unification in the first place will very often lead to non-perturbative evolution. We generalize this observation to arbitrary extensions of the Standard Model and of the MSSM and show that the requirement of perturbativity up to M^{min}_{B violation}, if considered a valid guideline for model building, severely limits the particle content of any such model, especially in the supersymmetric case. However, we also discuss several mechanisms to circumvent perturbativity and proton decay issues, for example in certain classes of extra dimensional models.
Kopp Joachim
Lindner Manfred
Niro Viviana
Underwood Thomas E. J.
No associations
LandOfFree
On the Consistency of Perturbativity and Gauge Coupling Unification does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the Consistency of Perturbativity and Gauge Coupling Unification, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Consistency of Perturbativity and Gauge Coupling Unification will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-554834