Standard-like models from Intersecting D5-branes

Abstract

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.

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

References in corpus (2)

• Orientifolds of K3 and Calabi-Yau Manifolds with Intersecting D-branes
• New Standard-like Models from Intersecting D4-Branes

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