English

Contribution to $\epsilon'/\epsilon$ from anomalous gauge couplings

High Energy Physics - Phenomenology 2009-10-31 v2

Abstract

Recently KTev collaboration has measured Re(ϵ/ϵ)=(28±4.1)×104Re(\epsilon'/\epsilon) = (28\pm 4.1) \times 10^{-4} which is in agreement with early measurement from NA31. The Standard Model prediction for ϵ/ϵ\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 ϵ/ϵ\epsilon'/\epsilon to have a value closer to data.

Keywords

Cite

@article{arxiv.hep-ph/9903242,
  title  = {Contribution to $\epsilon'/\epsilon$ from anomalous gauge couplings},
  author = {Xiao-Gang He},
  journal= {arXiv preprint arXiv:hep-ph/9903242},
  year   = {2009}
}

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