|When:||Friday, May 25, 2012|
4:00 PM - 5:00 PM
|Where:||Technological Institute, L211
2145 Sheridan Road
Evanston, IL 60208 map it
|Audience:||- Faculty/Staff - Student - Public|
|Group:||Department of Physics and Astronomy|
|Category:||Lectures & Meetings|
Prof. Luca Malgeri
"The FAST Experiment: A Precise Measurement of the Fermi Coupling Constant and of the Pion Lifetime"
Recently, a couple of experiments have entered the era of ppm (part-per-million) precision in the determination of G_F through the measurement of the muon lifetime. FAST (Fiber Active Scintillating Target) is one of them. It aims to the measurement of the positive muon lifetime to a precision of few ps in a sample of O(10^12) muon decays, collected at an event rate of around 70 kHz. The first physics results from FAST, from a short technical run, were published in 2008. Final results are expected in 2012 together with a new measurement of the positive pion lifetime with unprecedented precision. The presentation will focus on the experimental challenges of these measurements.