Reanalysis of CP Violation in K_L -> pi^+ pi^- gamma
High Energy Physics - Phenomenology
2009-10-31 v1 High Energy Physics - Experiment
Abstract
We present a reanalysis of direct CP violation in the decay K_L -> pi^+ pi^- gamma. We point out an existing discrepancy between the theoretical and experimental definitions of epsilon'_{+-gamma}. Adopting the experimental definition of epsilon'_{+-gamma}, we estimate that epsilon'_{+-gamma}/epsilon could be as large as a few times 10^{-4} both within the standard model and beyond. We discuss these estimates in detail and we also show how a judicious choice of E_gamma cuts can increase the sensitivity of the observable epsilon'_{+-\gamma} to the underlying CP violation.
Cite
@article{arxiv.hep-ph/0008238,
title = {Reanalysis of CP Violation in K_L -> pi^+ pi^- gamma},
author = {Jusak Tandean and G. Valencia},
journal= {arXiv preprint arXiv:hep-ph/0008238},
year = {2009}
}
Comments
24 pages, latex, 2 figures, uses axodraw