PoS - Proceedings of Science
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Quark and Lepton Flavor Physics
Standard Model Prediction for Direct CP-violation in K-decays, and Long-Distance Contributions to Kaonic Ampltiudes
C. Kelly
Full text: pdf
Pre-published on: February 06, 2017
Published on: April 19, 2017
Abstract
Recent theoretical and computational advances have enabled the precision determination of multi-particle Standard Model amplitudes using lattice QCD. In particular the measure of direct CP-violation in kaon decays, $\epsilon'$, has now been computed with errors that are 40\% of the experimental value; this quantity is highly sensitive to BSM sources of CP-violation and may help shed light on the origin of the matter-antimatter asymmetry in the Universe. We will discuss this calculation of $\epsilon'$ and our present and future efforts in improving our result. We will also briefly discuss our ongoing calculations of other long-distance contributions to kaonic amplitudes sensitive to new physics.
DOI: https://doi.org/10.22323/1.282.0533
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