Contribution to ${ϵ}^{\prime }/ϵ$ from anomalous gauge couplings

Abstract

Recently KTev collaboration has measured $Re({ϵ}^{\prime }/ϵ)=(28\pm 4.1)\times 10^{-4}$ which is in agreement with early measurement from NA31. The Standard Model prediction for ${ϵ}^{\prime }/ϵ$ is on the lower end of the experimentally allowed range depending on models for hadronic matrix elements. In this paper we study the contributions from anomalous gauge couplings. We find that the contributions from anomalous couplings can be significant and can ehance ${ϵ}^{\prime }/ϵ$ to have a value closer to data.

Comments: A typo in eq. 6, and numerical errors in eqs. 8 and 12 corrected. Anomalous gauge couplings can enhance e'/e by a factor as large as 2.5