Bubble chambers play a unique role in the hunt for dark matter, with both backgrounds and sensitivity that are complementary to the rest of the WIMP direct detection field. This complementarity is critical to maximize the community's chances for a dark matter discovery and will be the key to understanding any future WIMP signal. The PICO Collaboration's recent success (including the first ever zero-background result from a bubble chamber dark matter detector) has opened the door for continued exploration with this technique. I will review the PICO program, including backgrounds discovered and overcome along the way and the road forward with PICO-500. I will also describe progress on scintillating noble-liquid bubble chambers, with particular emphasis on the background discrimination and low-threshold (sub-keV) performance of this new hybrid technology.
Speaker: Eric Dahl, Northwestern Univ
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2575 Sand Hill Rd
Menlo Park, CA 94305