Final Results from the KTeV Experiment on the Decay $K_{L} \\to \\pi^0 \\gamma \\gamma$
Journal
Physical Review
Journal Volume
D77
Pages
112004
Date Issued
2008-05
Author(s)
Abouzaid E. et al.
Abstract
We report on a new measurement of the branching ratio B(KL→π 0γγ) using the KTeV detector. We reconstruct 1982 events with an estimated background of 608, that results in B(KL→π0γγ)=(1. 29±0.03stat±0.05syst)×10-6. We also measure the parameter, aV, which characterizes the strength of vector meson exchange terms in this decay. We find aV=-0.31±0.05stat±0.07syst. These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and aV. © 2008 The American Physical Society.
Type
journal article