Towards NNLO accuracy for <i>ε</i>′/<i>ε</i>

Cerda-Sevilla, M, Gorbahn, M, Jager, S and Kokulu, A
(2017) Towards NNLO accuracy for <i>ε</i>′/<i>ε</i>. X INTERNATIONAL CONFERENCE ON KAON PHYSICS, 800 (1). 012008-012008.

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The quantity $\varepsilon'/\varepsilon$ measures direct CP violation in Kaon decays. Recent SM predictions show a $2.9\sigma$ tension with data, with the theoretical uncertainty dominating. As rapid progress on the lattice is bringing nonperturbative long-distance effects under control, a more precise knowledge of short-distance contributions is needed. We describe the first NNLO results for $\varepsilon'/\varepsilon$ and discuss future prospects, as well as issues of scheme dependence and the separation of perturbative and nonperturbative effects. Finally we also comment on the solution of the renormalisation-group evolution in one of the talks at this conference and present the correct solution.

Item Type: Article
Additional Information: 8 pages, Proceedings of the Kaon 2016 Conference
Uncontrolled Keywords: hep-ph, hep-ph
Depositing User: Symplectic Admin
Date Deposited: 25 Aug 2017 08:29
Last Modified: 12 Oct 2023 23:57
DOI: 10.1088/1742-6596/800/1/012008
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