Authors: George Rajna
Free neutrons decay in about 900 s but, bound in nuclei, they are stable and make up somewhat more than half the mass of the visible universe."  The occasional decay of neutrons into dark matter particles could solve a long-standing discrepancy in neutron decay experiments.  The U.S. Department of Energy has approved funding and start of construction for the SuperCDMS SNOLAB experiment, which will begin operations in the early 2020s to hunt for hypothetical dark matter particles called weakly interacting massive particles, or WIMPs.  Thanks to low-noise superconducting quantum amplifiers invented at the University of California, Berkeley, physicists are now embarking on the most sensitive search yet for axions, one of today's top candidates for dark matter.  The Axion Dark Matter Experiment (ADMX) at the University of Washington in Seattle has finally reached the sensitivity needed to detect axions if they make up dark matter, physicists report today in Physical Review Letters.  Now our new study – which hints that extremely light particles called neutrinos are likely to make up some of the dark matter – challenges our current understanding of its composition.  A new particle detector design proposed at the) could greatly broaden the search for dark matter—which makes up 85 percent of the total mass of the universe yet we don't know what it's made of—into an unexplored realm.  University of Houston scientists are helping to develop a technology that could hold the key to unraveling one of the great mysteries of science: what constitutes dark matter?  This week, scientists from around the world who gathered at the University of California, Los Angeles, at the Dark Matter 2018 Symposium learned of new results in the search for evidence of the elusive material in Weakly Interacting Massive Particles (WIMPs) by the DarkSide-50 detector. 
Comments: 60 Pages.
[v1] 2018-08-15 09:13:56
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