Electroweak corrections to the Charm-Top-Quark Contribution to ϵK

[摘要] We calculate the leading-logarithmic and next-to-leading-logarithmic electroweak corrections to the charm-top-quark contribution to the effective |∆S| = 2 Lagrangian, relevant for the parameter ϵK. We find that these corrections lead to a −0.5% shift in the corresponding Wilson coefficient. Moreover, our calculation removes an implicit ambiguity in the standard-model prediction of ϵK, by fixing the renormalization scheme of the electroweak input parameters.

[发布日期] 2022-11-21

[关键词] CP Violation;Electroweak Precision Physics;Kaons