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Up-shot of inelastic down-scattering at CDMS-Si

Mads T. Frandsen^* and Ian M. Shoemaker^†

CP3-Origins and Danish Institute for Advanced Study (DIAS), University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark

^*frandsen@cp3-origins.net
^†shoemaker@cp3-origins.net

Phys. Rev. D 89, 051701(R) – Published 4 March, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.051701

Abstract

We study dark matter that inelastically scatters and deexcites in direct detection experiments, as an interpretation of the CDMS-Si events in light of the recent LUX data. The constraints from LUX and XENON10 require the mass splitting between the DM excited and deexcited states to be $| δ | ≳ 50 keV$ . At the same time, the CDMS-Si data themselves do not allow for a consistent DM interpretation for mass splittings larger than $| δ | \sim 200 keV$ . We find that a low-threshold analysis will be needed to rule out this interpretation of the CDMS-Si events. In a simple model with a kinetically mixed dark photon, we show that the CDMS-Si rate and the thermal relic abundance can both be accommodated.

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Up-shot of inelastic down-scattering at CDMS-Si

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