Gauge kinetic mixing and dark topological defects

A bstract We discuss how the topological defects in dark sector affect Standard Model when photon has a kinetic mixing with QED photon. In particular, we consider appearing successive gauge symmetry breaking, SU(2) → U(1) ℤ 2 , where remaining is center of SU(2). this model, monopole trapped into cosmic strings and forms so-called bead solution. As will discuss, string induces magnetic flux inside through mixing. The monopole, on other hand, does not induce symmetric phase, even presence Finally, show that solution spherically induced looks like viewed from distance, although satisfies Bianchi identity everywhere, which call pseudo monopole.