2011/10/31 by Mark Goodsell, Saul Ramos-Sanchez, Andreas Ringwald · 1 citation
Physics and Astronomy · #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep01(2012)021
28 pages
arxiv created 2011/10/31 · arxiv updated 2015/06/03
We study kinetic mixing between massless U(1) gauge symmetries in the bosonic formulation of heterotic orbifold compactifications. For non-prime ZN 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 Z6-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.