LZ Released First Science Results!

A profile-likelihood analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon cross-sections for WIMP masses above 9 GeV/c2. The most stringent limit is set at 30 GeV/c2 excluding cross sections above 5.9×10-48cm2 at the 90% confidence level.

A photo showing both PMT arrays during the cabling process in the surface lab at SURFA close-up photo showing the base attachment procedureA close-up of one stage of the PMT dressing procedureA photo of Jake Lyle installing a top array PMTA close-up photo of LZ's bottom PMT arrayThe bottom LZ PMT array with 241 photomultiplier tubes


We are the Particle Astrophysics Group at Brown University. Our group consists of faculty, post docs, graduate students, and undergraduates conducting experimental work in direct dark matter detection.

Our group is currently involved in a research collaboration called LZ, a 10 tonne liquid xenon experiment almost 1 mile underground at the Sanford Underground Laboratory in South Dakota.

Congratulations to Will Taylor on completing his PhD thesis Neutron Calibrations and Activation Signals in Low-Background Liquid Xenon Dark Matter Detectors!

Dark Matter

Learn more about dark matter, and why we are searching for it.


See all our publications.

About Us

Learn more about the individual members of our group.


See pictures of our work.


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