MIRROR MATTER ADMIXTURES IN KL→μ+μ-

Abstract

Our previous analysis on the contributions of mirror matter admixtures in ordinary hadrons to KL→γγ is extended to study the relevance of such contributions to the KL→μ+μ-rare decay. The mixing angle of the admixtures previously determined to describe the enhancement phenomenon in two-body non-leptonic decays of strange hadrons is used, along with recent results for the description of the strong and electromagnetic interaction parts of the transition amplitudes. We find that these admixtures give a significant contribution with a small SU(2) breaking of only 2.8%, we also find a value of ~ -17.9° for the η–η′ mixing angle consistent with some of its determinations in the literature and a preferred negative value around -16 for the local counterterm contribution χ1+χ2consistent with the existence of a unique counterterm assuming lepton universality. We conclude that those mixings may be relevant in low energy physics and should not be ignored.