Two-loop electroweak corrections to the Top-Quark Contribution to ?K
نویسندگان
چکیده
A bstract The parameter ? K measures CP violation in the neutral kaon system. It is a sensitive probe of new physics and plays prominent role global fit Cabibbo-Kobabyashi-Maskawa matrix. perturbative theory uncertainty currently dominated by top-quark contribution. Here, we present calculation full two-loop electroweak corrections to contribution , including resummation QED-QCD logarithms. We discuss different renormalization prescriptions for input parameters. In traditional normalization weak Hamiltonian with two powers Fermi constant G F shifted ? 1%.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2021
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep12(2021)198