Speaker
Dr
William Marciano
(BNL)
Description
A new method for computing hadronic effects on electroweak radiative corrections to
low energy semileptonic weak interaction processes is described. Applying this
approach to the extraction of the quark mixing matrix element Vud, Alberto Sirlin
and I find from superallowed nuclear beta decay Vud = 0.97377(27).
Combining that result with recent determinations of Vus from kaon decays provides a
precision test of CKM unitarity and constraint on new physics effects.. Prospects
for further improvements are briefly discussed.
Primary author
Dr
William Marciano
(BNL)
