# Updated Constraints on the Dark Matter Interpretation of CDMS-II-Si Data

## TL;DR

This paper updates the analysis of light WIMP dark matter candidates explaining CDMS-II-Si data, showing such models are highly tuned and unlikely, and can only be ruled out by future large-scale experiments.

## Contribution

It provides the first combined halo-dependent and halo-independent analysis including recent constraints and future sensitivities for light WIMP models.

## Key findings

- Viable dark matter candidates marginally fit current null results.
- Such models are highly tuned and unlikely to explain CDMS-II-Si.
- Future experiments like LZ or PICO-250 can definitively test these models.

## Abstract

We present an updated halo-dependent and halo-independent analysis of viable light WIMP dark matter candidates which could account for the excess observed in CDMS-II-Si. We include recent constraints from LUX, PandaX-II, and PICO-60, as well as projected sensitivities for XENON1T, SuperCDMS SNOLAB, LZ, DARWIN, DarkSide-20k, and PICO-250, on candidates with spin-independent isospin conserving and isospin-violating interactions, and either elastic or exothermic scattering. We show that there exist dark matter candidates which can explain the CDMS-II-Si data and remain very marginally consistent with the null results of all current experiments, however such models are highly tuned, making a dark matter interpretation of CDMS-II-Si very unlikely. We find that these models can only be ruled out in the future by an experiment comparable to LZ or PICO-250.