2018/11/28 by Gisbert, Hector
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1811.12206
A recent lattice prediction of ε'/ε, with a 2.1 σ deviation from the experimental value, has triggered several studies of possible contributions from physics beyond the Standard Model. We have recently updated the SM prediction, including all known short-distance and long-distance contributions, our result Re(ε'/ε) = (15 ± 7)⋅ 10-4 is in complete agreement with the experimental measurement. In addition, we emphasize on the importance of the long-distance re-scattering of the final pions in K → ππ for a correct prediction of ε'/ε.