University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Colloquium

Thursday, April 7th 2016
3:35 pm:
Speaker: Adam Lyon, Fermilab
Subject:  The New Muon g-2 Experiment at Fermilab
Refreshments to be served outside 101 Fraser after the colloquium

The anomalous magnetic moment of the muon is a direct window to new physics and has been the subject of nuclear and particle physics experiments for the past 60 years. It drives both theory and experiment to new levels of precision and sensitivity. The latest result in this enterprise is from the 1999-2001 run of the Brookhaven E821 experiment. With 0.54 parts per million (ppm) precision, it differs from the Standard Model prediction by more than 3 sigma – enough to be extremely intriguing, but not conclusive. By moving the main apparatus, a 50 foot diameter superconducting storage ring, from Brookhaven to Fermilab, the experiment will be repeated with a more intense and cleaner beam and all new detectors. The outcome will be a factor of four improvement in precision. If the difference seen at E821 between experiment and the Standard Model persists, the discrepancy will greater than 5 sigma and possibly be greater than 7 sigma if the theoretical prediction improves as expected. Such a result would be an undeniable signal of new physics. I will present the past, present, and future aspects of Muon g-2 measurement. With first muons only a year away, I will focus on the progress at the Fermilab experiment.

Faculty Host: Dan Cronin-Hennessy

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