Status Update of PSI Experiment R-89.01.1
DECAY RATETHE PIBETA COLLABORATION
23 November 1995
The PIBETA project at PSI is a program of
measurements with the aim of making a precise determination of the pion
beta decay rate, initially to 
0.5%. Significant delays as well as
developments have occurred in this project since the original approval by
the BV in 1992. The purpose of this document is to present a condensed
update of the experimental method and the associated systematics.