Speaker
Description
We explore supersymmetric contributions to the decay K 0 S →μ + μ − , in light of current experimental data. The Standard Model (SM) predicts B(K 0 S →μ + μ − )≈5×10 −12 . We find that contributions arising from flavour violating Higgs penguins can enhance the branching fraction up to ≈35×10 −12 within different scenarios of the Minimal Supersymmetric Standard Model (MSSM), as well as suppress it down to ≈0.78×10 −12 . Regions with fine-tuned parameters can bring the branching fraction up to the current experimental upper bound, 8×10 −10 . The mass degeneracy of the heavy Higgs bosons in MSSM induces correlations between B(K 0 S →μ + μ − ) and B(K 0 L →μ + μ − ) . Predictions for the CP asymmetry in K 0 →μ + μ − decays in the context of MSSM are also given, and can be up to eight times bigger than in the SM. The study is accepted for publication in JHEP
