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

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'_{+-γ} to the underlying CP violation.

24 pages, latex, 2 figures, uses axodraw

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Cited by in corpus (10)

• Kaon Decays in the Standard Model
• New Physics and CP Violation in Hyperon Nonleptonic Decays
• K^+ -> pi^+pi^0e^+e^-: a novel short-distance probe
• The s ---> d gamma decay in and beyond the Standard Model
• Probing CP Violation in Omega->Lambda K->p pi K Decay
• Kaon decays shedding light on massless dark photons
• Form factor in K+ --> pi+ pi0 gamma: interference versus direct emission
• Probing New Physics in Charm Couplings with FCNC
• Charge asymmetry in K+- --> π+-γγinduced by the electromagnetic penguin operators
• CP-violation in K_{S,L}->π^{+}π^{-}γand K_{S,L}->π^{+}π^{-}e^{+}e^{-} decays