Standard-like models from Intersecting D5-branes

Details Standard-like models from Intersecting D5-branes Standard-like models from Intersecting D5-branes

2002-10-22

arxiv.org/abs/hep-th/0210219v2

Phys.Lett. B553 (2003) 79-86

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, LaTeX file, version to appear in Physics Letters B

Scientific paper

10.1016/S0370-2693(02)03190-8

We construct intersecting D5-brane orbifold models that yield the (non-supersymmetric) standard model up to vector-like matter and charged-singlet scalars. The models are constrained by the requirement that twisted tadpoles cancel, and that the gauge boson coupled to the weak hypercharge $U(1)_Y$ does not get a string-scale mass via a generalised Green-Schwarz mechanism. Gauge coupling constant ratios close to those measured are easily obtained for reasonable values of the parameters, consistently with having the string scale close to the electroweak scale, as required to avoid the hierarchy problem.

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