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

10th International Conference on Kaon Physics

Kitahara, T.^1,2 ; Nierste, U.^1 ; Tremper, P.^1

Institute for Theoretical Particle Physics (TTP), Karlsruhe Institute of Technology, Engesserstraße 7, Karlsruhe

D-76128, Germany^1

Institute for Nuclear Physics (IKP), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen

D-76344, Germany^2

关键词: CP violations;    Majorana;    Minimal supersymmetric standard models;    New physics;    Phenomenological analysis;    Recent progress;    Trojans;    Without fine-tuning;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/800/1/012019/pdf
DOI  :  10.1088/1742-6596/800/1/012019

来源: IOP

【 摘 要 】

Using the recent first lattice results of the RBC-UKQCD collaboration for K → ππ decays, we perform a phenomenological analysis of and find a discrepancy between SM prediction and experiments by ∼ 3σ. We discuss an explanation by new physics. The well-understood value of K, which quantifies indirect CP violation, however, typically prevents large new physics contributions to . In this talk, we show a solution of the 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 , while the contribution to Kis suppressed thanks to the Majorana nature of gluinos.