dark matter

The LUX-ZEPLIN collaboration has published results showing radioactive background levels for experiment’s components, creating a library for future rare event searches.

From Science, Oct. 2, 2020: As U.S. particle physicists start to drum up new ideas for the next decade in a yearlong Snowmass process they have no single big project to push for (or against). Physicists have just started to build the current plan’s centerpiece: The Long-Baseline Neutrino Facility at Fermilab will shoot particles through 1,300 kilometers of rock to the Deep Underground Neutrino Experiment in South Dakota. Fermilab Deputy Director of Research Joe Lykken and Fermilab scientist Vladimir Shiltsev comment on other possible pursuits in high-energy physics.

Tiffenberg shares the $100,000 prize for advances in dark matter detection technology. He and collaborators on the SENSEI experiment drove the development of innovative sensors called skipper CCDs, which are sensitive enough to be able to pick up signals from dark matter particles of low mass.

Scientists on the Dark Energy Survey have used observations of the smallest known galaxies to better understand dark matter, the mysterious substance that makes up 85% of the matter in the universe. The smallest galaxies can contain hundreds to thousands of times more dark matter than normal visible matter, making them ideal laboratories for studying this mysterious substance. By performing a rigorous census of small galaxies surrounding our Milky Way, scientists on the Dark Energy Survey have been able to constrain the fundamental particle physics that governs dark matter.

No one knows for sure what dark matter is. But we know we need something to explain what we see in the universe, and we’ve crossed a few ideas off of our list.

From Department of Energy, July 6, 2020: DOE announces $132 million in funding for 64 university research awards on a range of topics in high-energy physics to advance knowledge of how the universe works at its most fundamental level. Projects include experimental work on neutrinos at Fermilab, the search for dark matter, studies of the nature of dark energy and the expansion of the universe with the Dark Energy Spectroscopic Instrument and and investigation of the Higgs boson from data collected at the Large Hadron Collider at CERN in Switzerland.

From New Scientist, July 1, 2020: Fermilab theorist Gordan Krnjaic and Fermilab postdoc Daniel Carney of the University of Maryland are quoted in this article on efforts to sense its minuscule gravitational force as it brushes past us.

From Science News, June 17, 2020: An experiment searching for cosmic dark matter may have finally detected something. But it’s not dark matter. Scientists with the XENON1T experiment reported data June 17 showing an unexpectedly large number of blips within their detector. Fermilab scientist Dan Hooper is quoted in this piece.

From Scientific American, June 9, 2020: Dark matter researchers are reassessing theories about how dark matter particles lighter than a proton might appear in their detectors. In a recent paper, Fermilab scientists Noah Kurinsky and Gordan Krnjaic propose that a detector could find plasmons — aggregates of electrons moving together in a material — produced by dark matter.

A good dark matter detector has a lot in common with a good teleconference setup: You need a sensitive microphone and a quiet room. The SENSEI experiment has demonstrated world-leading sensitivity and the low background needed for an effective search for low-mass dark matter.