Discrete Gauge Symmetry and Aharonov-Bohm Radiation in String Theory

Abstract

We investigate cosmological constraints on phenomenological models with discrete gauge symmetries by discussing the radiation of standard model particles from Aharonov-Bohm strings. Using intersecting D-brane models in Type IIA string theory, we demonstrate that Aharonov-Bohm radiation, when combined with cosmological observations, imposes constraints on the compactification scales.

Comments: 20 pages, 4 figures; v2, refs and comments added