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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Abstract

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
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3009144