Authors: Mads T Frandsen Felix Kahlhoefer Subir Sarkar Kai SchmidtHoberg
Publish Date: 2011/09/27
Volume: 2011, Issue: 9, Pages: 128-
Abstract
We discuss the direct detection signatures of dark matter interacting with nuclei via a new neutral gauge boson Z′ focussing on the case where both the dark matter and the Z′ have mass of a few GeV Isospin violation ie different couplings to protons and neutrons arises naturally in this scenario In particular it is possible to reconcile the preferred parameter regions inferred from the observed DAMA and CoGeNT modulations with the bounds from XENON100 which requires f n /f p ≃ − 07 Moreover the Z′ mediator can also yield a large spindependent crosssection which could contribute to the DAMA signal while the spinindependent crosssection is adequate to explain the CoGeNT signal
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