Reanalysis of CP Violation in K_L -> pi^+ pi^- gamma

Details Reanalysis of CP Violation in K_L -> pi^+ pi^- gamma Reanalysis of CP Violation in K_L -> pi^+ pi^- gamma

2000-08-22

arxiv.org/abs/hep-ph/0008238v1

Phys.Rev. D62 (2000) 116007

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, latex, 2 figures, uses axodraw

Scientific paper

10.1103/PhysRevD.62.116007

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.

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