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arXiv · 1105.3734

On the DAMA and CoGeNT Modulations

Mads T. Frandsen·Felix Kahlhoefer·John March-Russell·Christopher McCabe·Matthew McCullough·Kai Schmidt-Hoberg
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Abstract

DAMA observes an annual modulation in their event rate, as might be expected from dark matter scatterings, while CoGeNT has reported evidence for a similar modulation. The simplest interpretation of these findings in terms of dark matter-nucleus scatterings is excluded by other direct detection experiments. We consider the robustness of these exclusions with respect to assumptions regarding the scattering and find that isospin-violating inelastic dark matter helps alleviate this tension and allows marginal compatibility between experiments. Isospin-violation can significantly weaken the XENON constraints, while inelasticity enhances the annual modulation fraction of the signal, bringing the CoGeNT and CDMS results into better agreement.

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Mads T. Frandsen, Felix Kahlhoefer, John March-Russell, Christopher McCabe, Matthew McCullough, Kai Schmidt-Hoberg. 2011-07-06. On the DAMA and CoGeNT Modulations. https://doi.org/10.1103/physrevd.84.041301

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