Abstract

The quantity ε′/ε measures direct CP violation in Kaon decays. Recent SM predictions show a 2.9σ 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 ε′/ε 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.

Details

Title
Towards NNLO accuracy for ε′/ε
Author
Cerdà-Sevilla, M 1 ; Gorbahn, M 1 ; Jäger, S 2 ; Kokulu, A 1 

 Department of Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, UK 
 Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, UK 
Publication year
2017
Publication date
Jan 2017
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2573807908
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.