Abstract
We report on a new measurement of the branching ratio using the KTeV detector. We reconstruct 1982 events with an estimated background of 608, that results in . We also measure the parameter, , which characterizes the strength of vector meson exchange terms in this decay. We find . These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and .
1 More- Received 28 April 2008
DOI:https://doi.org/10.1103/PhysRevD.77.112004
©2008 American Physical Society