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In this issue:
Muon Makes Tracks in EXO-200 Detector
Einstein's Universe: the Scientist, the Man, the Musician
Colloquium Today: Accelerator Frontiers—Where Can We Go
Monday - January 31, 2011 |
Muon Makes Tracks in EXO-200 DetectorThe Enriched Xenon Observatory-200, a prototype observatory that will search for exotic decays of fundamental particles of matter, passed a significant if unofficial milestone last month: its detector registered the track of a cosmic-ray muon. "For the first time we have everything going underground," said SLAC physicist and EXO collaboration member Marty Breidenbach. During commissioning of the experiment in the final two months of last year, the team filled EXO's central chamber with liquid xenon and tested the full experimental setup for the first time. EXO-200 will use a detector filled with 200 kilograms of liquid xenon to detect a type of particle decay known as neutrinoless double-beta decay. Neutrinoless double-beta decay has been predicted but never seen. Seeing it—or even not seeing it within a certain time period—can help place bounds on the mass of the neutrino, that miniscule particle that streams through most matter, including us, by the billions each second with nary a clue. Read more... Einstein's Universe:
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