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Recent progress on CP violation in K→ππ decays in the SM and a supersymmetric solution

Kitahara, Teppei; Nierste, Ulrich; Tremper, Paul

Abstract (englisch):
Using the recent first lattice results of the RBC-UKQCD collaboration for K→ππ decays, we perform a phenomenological analysis of ϵ′K/ϵK and find a discrepancy between SM prediction and experiments by ∼3σ. We discuss an explanation by new physics. The well-understood value of ϵK, which quantifies indirect CP violation, however, typically prevents large new physics contributions to ϵ′K/ϵK. In this talk, we show a solution of the ϵ′K/ϵK discrepancy in the Minimal Supersymmetric Standard Model with squark masses above 3 TeV without fine-tuning of CP phases. In this solution, the Trojan penguin diagram gives large isospin-breaking contributions which enhance ϵ′K, while the contribution to ϵK is suppressed thanks to the Majorana nature of gluinos.


Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1088/1742-6596/800/1/012019
ISSN: 1742-6588, 1742-6596
KITopen ID: 1000069120
HGF-Programm 51.01.01; LK 01
Erschienen in Journal of physics / Conference Series
Band 800
Heft 1
Seiten Art.Nr.: 012019
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