Study of the Decays KL -> pi+ pi- gamma and KL -> pi+ pi- e+ e- at KTeV
High Energy Physics - Experiment
2007-05-23 v1
Abstract
We present new results on the related rare KL decay modes KL -> pi+ pi- gamma and KL -> pi+ pi- e+ e-. KTeV has performed the first direct measurement of the form factor for the "direct emission" component of KL -> pi+ pi- gamma decays, a quantity with ramifications for particular chiral models. In addition, the form factor and direct emission/inner bremsstrahlung branching ratio - also presented here - are important input parameters for the understanding of the planar-angle distribution of KL -> pi+ pi- e+ e- decays. Preliminary results indicating the presence of a T-violating asymmetry in the KL -> pi+ pi- e+ e- angular distribution are presented.
Cite
@article{arxiv.hep-ex/9903025,
title = {Study of the Decays KL -> pi+ pi- gamma and KL -> pi+ pi- e+ e- at KTeV},
author = {John Belz},
journal= {arXiv preprint arXiv:hep-ex/9903025},
year = {2007}
}
Comments
6 pages, Latex, 9 .eps figures, presented at DPF99