Schedule Apr 5, 2000
Searching for Dark Matter Axions
Dr. Leslie Rosenberg, MIT
Axions address two great questions in science—what is the nature of matter in the universe and what is the structure of the vacuum. The axion, a hypothetical elementary particle, emerges from symmetries that suppress otherwise large CP violating effects in QCD, and has properties that make it a good dark matter candidate. These dark matter axions have extraordinarily feeble couplings to matter and radiation, making their detection difficult. There has been a succession of experiments aimed at their discovery, and finally these experiments have achieved the sensitivity where axions might plausibly be detected. This colloquium is an overview of these searches, emphasizing recent results and future directions for the field.

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