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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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000069120
Veröffentlicht am 01.02.2018
Originalveröffentlichung
DOI: 10.1088/1742-6596/800/1/012019
Coverbild
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
urn:nbn:de:swb:90-691204
KITopen-ID: 1000069120
HGF-Programm 51.01.01 (POF III, LK 01)
Erschienen in Journal of physics / Conference Series
Band 800
Heft 1
Seiten Art.Nr.: 012019
Nachgewiesen in Scopus
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