Kinetic Mixing of U(1)s in Heterotic Orbifolds

Details Kinetic Mixing of U(1)s in Heterotic Orbifolds Kinetic Mixing of U(1)s in Heterotic Orbifolds

2011-10-31

arxiv.org/abs/1110.6901v1

Physics

High Energy Physics

High Energy Physics - Theory

28 pages

Scientific paper

We study kinetic mixing between massless U(1) gauge symmetries in the bosonic formulation of heterotic orbifold compactifications. For non-prime Z_N factorisable orbifolds, we find a simple expression of the mixing in terms of the properties of the N=2 subsectors, which helps understand under what conditions mixing can occur. With this tool, we analyse Z_6-II heterotic orbifolds and find non-vanishing mixing even without including Wilson lines. We show that some semi-realistic models of the Mini-Landscape admit supersymmetric vacua with mixing between the hypercharge and an additional U(1), which can be broken at low energies. We finally discuss some phenomenologically appealing possibilities that hidden photons in heterotic orbifolds allow.

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