Study of the decay K(L) ---> pi+- pi0 e-+ anti-neutrino (neutrino)
Journal
Physics Review Letters
Journal Volume
70
Pages
1591-1594
Date Issued
1993-03
Author(s)
Makoff, G.
Abstract
We have observed 72915 KL0e() decays in the data set collected in the 19871988 run of Fermilab experiment E731. We found the Ke4 branching ratio to be [5.160.20(stat)0.22(sys)]×10-5. We also performed the first measurement of the form factors parametrizing the decay. Our branching ratio result agrees with a prediction using a vector-meson-exchange model. An interpretation of the data in terms of chiral perturbation theory implies a value L3=(3.40.4) ×10-3 in the O(p4) chiral Lagrangian. © 1993 The American Physical Society.
Type
journal article