Limits on Lorentz violation in neutral-Kaon decay
Abstract
The KLOE collaboration recently reported bounds on the directional dependence of the lifetime of the short-lived neutral kaon K_S with respect to the cosmic microwave background dipole anisotropy. We interpret their results in a general framework developed to probe Lorentz violation in the weak interaction. In this approach a Lorentz-violating tensor \chi_{\mu\nu} is added to the standard propagator of the W boson. We derive the K_S decay rate in a naive tree-level model and calculate the asymmetry for the lifetime. By using the KLOE data the real vector part of \chi_{\mu\nu} is found to be smaller than 10^-2. We briefly discuss the theoretical challenges concerning nonleptonic decays.
Cite
@article{arxiv.1308.6468,
title = {Limits on Lorentz violation in neutral-Kaon decay},
author = {K. K. Vos and H. W. Wilschut and R. G. E. Timmermans},
journal= {arXiv preprint arXiv:1308.6468},
year = {2013}
}
Comments
Presented at the Sixth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 17-21, 2013"