The Up-Shot of Inelastic Down-Scattering at CDMS-Si
  We study dark matter that inelastically scatters and de-excites 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 de-excited states to be $|\delta|
\gtrsim 50$ keV. At the same time, the CDMS-Si data itself do not allow for a
consistent DM interpretation for mass splittings larger than $|\delta| \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.
