Isospin-violating dark matter from a double portal

Abstract

We study a simple model that can give rise to isospin-violating interactions\nof Dirac fermion asymmetric dark matter to protons and neutrons through the\ninterference of a scalar and U(1)$'$ gauge boson contribution. The model can\nyield a large suppression of the elastic scattering cross section off Xenon\nrelative to Silicon thus reconciling CDMS-Si and LUX results while being\ncompatible with LHC findings on the 126 GeV Higgs, electroweak precision tests\nand flavour constraints.\n