$\varepsilon'/\varepsilon$ in the Standard Model and Beyond: 2021
Abstract
The present status of the ratio in the Standard Model (SM) is summarized. In particular we stress the differences between three approaches that attempt to calculate within the SM: Lattice QCD, Dual QCD and Chiral Perturbation Theory. As presently there is still a significant room left for new physics (NP) contributions, we summarize the present status of the technology that has been recently developed with the goal to analyze and its correlations with other observables within the Weak Effective Theory (WET) and the Standard Model Effective Field Theory (SMEFT). We also make a few comments on the interpretation of the main dynamics behind the rule in decays.
Cite
@article{arxiv.2203.12632,
title = {$\varepsilon'/\varepsilon$ in the Standard Model and Beyond: 2021},
author = {Andrzej J. Buras},
journal= {arXiv preprint arXiv:2203.12632},
year = {2022}
}
Comments
16 pages, no figures, Contribution to the CKM Workshop 2021, 22-26 November 2021, Melbourne, Australia. arXiv admin note: text overlap with arXiv:1912.12306