Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-07-15
Nucl.Phys. B730 (2005) 179-190
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 6 figures
Scientific paper
10.1016/j.nuclphysb.2005.09.022
The issue of non-local GUT symmetry breaking is addressed in the context of open string model building. We study ZNxZM' orbifolds with all the GUT-breaking orbifold elements acting freely, as rotations accompanied by translations in the internal space.We consider open strings quantized on these backgrounds, distinguishing whether the translational action is parallel or perpendicular to the D-branes. GUT breaking is impossible in the purely perpendicular case, non-local GUT breaking is instead allowed in the purely parallel case. In the latter, the scale of breaking is set by the compactification moduli, and there are no fixed points with reduced gauge symmetry, where dangerous explicit GUT-breaking terms could be located. We investigate the mixed parallel+perpendicular case in a Z2xZ2' example, having also a simplified field theory realization.It is a new S1/Z2xZ2' orbifold-GUT model, with bulk gauge symmetry SU(5)xSU(5) broken locally to the Standard Model gauge group. In spite of the locality of the GUT symmetry breaking, there is no localized contribution to the running of the coupling constants, and the unification scale is completely set by the length of S1.
No associations
LandOfFree
Gauge unification, non-local breaking, open strings 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 Gauge unification, non-local breaking, open strings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge unification, non-local breaking, open strings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411628