On the Pais--Treiman method to measure $\pi \pi$ phase shifts in $K_{e4}$ decays

Abstract

We evaluate theoretical uncertainties to the method of Pais and Treiman to measure the $\pi \pi$ phase shifts in $K_{e4}$ decays. We find that they are very small, below $1\%$.

Comments: 10 pages, LaTex, 1 fig. appended as postscript file, IPNO/TH 94-36,BUTP-94/11,ROM2F-94/19