Nuclear Physics Seminars

ics Nuclear
Tuesday, October 10, 2000
3:30 PM
Physics Building, Room 204
Emil Frlez [Host: Dinko Pocanic]
University of Virginia
"Is There A Tensor Admixture To V-A Interaction In The Radiative Pion Decay?"
The PIBETA experiment at PSI has been taking data for over a year. Acquired statistics of rare pion and muon decays exceeds now the previous world total by up to an order of magnitude. In this talk I will examine the pi+ --> e+ gamma events collected so far, especially in the part of the phase space sensitive to deviations from the canonical V-A interaction. As the PIBETA detector is running with 12 simultaneous physics triggers, the cross-normalization of different decay channels enables us to extract the absolute pi+ --> e+ nu gamma branching ratio in a simple way and compare it with a straightforward theoretical calculation.

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