Friday, April 5, 2002, 16:00
WHGA Auditorium
Prof. P. Truöl, Univ. Zürich
Abstract:
Experiment E865 at the AGS of the Brookhaven National Laboratory,
of which the PSI detector group was a major partner, was set up to
search for the lepton flavour violating decay of the K+ into
pi+mu+e- at the 10**(-11) level. The versatility of the apparatus
allowed also considerably improved measurements
of other lepton flavor violing decays,
of flavour changing neutral current decays (pi+mu+mu-, pi+e+e-),
of radiative K+ decays, and of Ke4 (pi+pi-e+nu). From the latter
data an accurate value of the s-wave pi-pi scattering length
has been extracted.
Most results serve as sensitive tests of chiral
perturbation theory predictions.