Contribution to $ε'/ε$ from anomalous gauge couplings

Details Contribution to $ε'/ε$ from anomalous gauge couplings Contribution to $ε'/ε$ from anomalous gauge couplings

1999-03-03

arxiv.org/abs/hep-ph/9903242v2

Phys.Lett. B460 (1999) 405-410

Physics

High Energy Physics

High Energy Physics - Phenomenology

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 la

Scientific paper

10.1016/S0370-2693(99)00743-1

Recently KTev collaboration has measured $Re(\epsilon'/\epsilon) = (28\pm 4.1) \times 10^{-4}$ which is in agreement with early measurement from NA31. The Standard Model prediction for $\epsilon'/\epsilon$ 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 $\epsilon'/\epsilon$ to have a value closer to data.

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