Abstract
The first result of the lattice simulation and improved perturbative calculations have pointed to a discrepancy between data on ε′k/εk and the standard-model (SM) prediction. Several new physics (NP) models can explain this discrepancy, and such NP models are likely to predict deviations of ℬ(K → πvv) from the SM predictions, which can be probed precisely in the near future by NA62 and KOTO experiments. We present correlations between ε′k/εk and ℬ(K → πvv) in two types of NP scenarios: a box dominated scenario and a Z-penguin dominated one. It is shown that different correlations are predicted and the future precision measurements of K → πvv can distinguish both scenarios.
Highlights
Introduction and StandardModel predictions of ε′Charge-parity (CP) violating flavour-changing neutral current decays of K mesons are extremely sensitive to new physics (NP) and can probe radiative corrections of particles with masses far above the reach of the Large Hadron Collider
We introduced the current situation for the ε′K/εK within the Standard Model (SM)
The first lattice result and the improved perturbative calculations have shown the discrepancy between the predicted value and the data
Summary
Introduction and StandardModel predictions of ε′Charge-parity (CP) violating flavour-changing neutral current decays of K mesons are extremely sensitive to new physics (NP) and can probe radiative corrections of particles with masses far above the reach of the Large Hadron Collider.
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