Latest Results on Weak Semi-Leptonic Hyperon Decays in KTeV

Abstract

The KTeV experiment at Fermilab has finished its ${\Xi }^0$ semi-leptonic decay analysis from the 1997 run and presented here are the final numbers for the branching ratio and form factors. A new run with three times the statistics was taken in 1999 and a first look at the data shows the quality and consistency of the results, predicting a similar improvement in these measurements.

arXiv comment4 pages and 4 figures, presented at IV Int. Conference on Hyperons, Charm and Beauty, Valencia Spain, 26-30 June 2000