Standard Model and New physics for ε^′_k/ε_k

Abstract

Abstract. The first result of the lattice simulation and improved perturbative calculations have pointed to a discrepancy between data on ε ′ K /ε K 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 → πνν) from the SM predictions, which can be probed precisely in the near future by NA62 and KOTO experiments. We present correlations between ε ′ K /ε K and B(K → πνν) 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 → πνν can distinguish both scenarios.

Recent progress in Fe3O4 based magnetic nanoparticles: from synthesis to application

“…Magnetite (Fe 3 O 4 ) is sensitive to oxidation, so it is not very stable and always transforms to maghemite (γ-Fe 2 O 3 ) in the presence of oxygen, as shown in equation (2). 15 …”