Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5495432 | Physics Letters B | 2017 | 9 Pages |
Abstract
Recent lattice QCD calculations of direct CP violation in KLâÏÏ decays indicate tension with the experimental results. Assuming this tension to be real, we investigate a possible beyond-the-Standard Model explanation via right-handed charged currents. By using chiral perturbation theory in combination with lattice QCD results, we accurately calculate the modification of ϵâ²/ϵ induced by right-handed charged currents and extract values of the couplings that are necessary to explain the discrepancy, pointing to a scale around 10-100TeV. We find that couplings of this size are not in conflict with constraints from other precision experiments, but next-generation hadronic electric dipole moment searches (such as neutron and 225Ra) can falsify this scenario. We work out in detail a direct link, based on chiral perturbation theory, between CP violation in the kaon sector and electric dipole moments induced by right-handed currents which can be used in future analyses of left-right symmetric models.
Related Topics
Physical Sciences and Engineering
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Authors
V. Cirigliano, W. Dekens, J. de Vries, E. Mereghetti,