Theoretical status of ε′/ε. (April 2020)

• Record Type: Journal Article
• Authors: Cirigliano, V; Gisbert, H; Pich, A; Rodríguez-Sánchez, A
• Is Part Of: Journal of physics. Volume 1526(2020)
• Publication Date: 2020-04
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1526/1/012011
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We briefly overview the historical controversy around Standard Model predictions of ε ′ / ε and clarify the underlying physics. A full update of this important observable is presented, with all known short- and long-distance contributions, including isospin-breaking corrections. The current Standard Model prediction, Re( ε ′ / ε ) = (14 ± 5) · 10 −4 [1, 2], is in excellent agreement with the experimentally measured value.