How dark matter cares about topological superstrings
arXiv:1007.0539
Abstract
Non-trivial toplogical properties of string world-sheets with three boundaries can give rise to superpotentials which preserve supersymmetry but violate R-symmetry by two units. This results in four point functions which permit s-wave annihilation of two neutralinos into gauge bosons. If the topological partition function is such as to allow saturation of the WMAP dark matter density for low string scales (M_s ~ 2 TeV), the annihilation into monochromatic gamma rays is predicted to lie about a factor of 2 below the current H.E.S.S. measurement of gamma ray flux from the galactic center. Thus, it may be detectable in the next round of gamma ray observations.
Proceedings XVI International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2010); Fermilab, June28 to July 2, 2010; "Paper # C18"