Nuclear Physics Seminars

ics Nuclear
Wednesday, January 14, 2009
3:30 PM
Physics Building, Room 204
Note special date.
Anthony Palladino [Host: Don Crabb]
University of Virginia
"Precise Measurement of the π → e υ Branching Ratio"
 Slideshow (PDF)
The PEN experiment aims to measure the semileptonic decay π → eν(γ)(πe2 decay) branching ratio at PSI, with an ncertainty of ΔB/B∼5×10-4,or better, using a large-angle detector system featuring a pure CsI calorimeter. This experiment will give a stringent test of lepton universality. Preliminary results from a basic level analysis of data from the first two developmental runs will be discussed. These results, coupled with a discussion of experimental techniques, such as the use of a segmented active degrader and target waveform digitization, will demonstrate our ability to control systematic uncertainties in the experiment.

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