Can String Theory Predict the Weinberg Angle?

Details Can String Theory Predict the Weinberg Angle? Can String Theory Predict the Weinberg Angle?

2007-06-01

arxiv.org/abs/0706.0217v1

Phys.Rev.D76:086006,2007

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 6 figures

Scientific paper

10.1103/PhysRevD.76.086006

We investigate whether the hypercharge assignments in the Standard Model can be interpreted as a hint at Grand Unification in the context of heterotic string theory. To this end, we introduce a general method to calculate U(1)_Y for any heterotic orbifold and compare our findings to the cases where hypercharge arises from a GUT. Surprisingly, in the overwhelming majority of 3-2 Standard Models, a non-anomalous hypercharge direction can be defined, for which the spectrum is vector-like. For these models, we calculate sin^2 theta to see how well it agrees with the standard GUT value. We find that 12% have sin^2 theta = 3/8, while all others have values which are less. Finally, 89% of the models with sin^2 theta = 3/8 have U(1)_Y in SU(5).

Affiliated with

Also associated with

No associations

Rating

Can String Theory Predict the Weinberg Angle? 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 Can String Theory Predict the Weinberg Angle?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can String Theory Predict the Weinberg Angle? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-308488