Natural supersymmetry and kaon mixing in view of recent results from lattice QCD

Lattice results are available for ΔS=2 matrix elements for the first time in full QCD, which improve considerably the status of hadronic uncertainties in K-K̄ mixing with respect to earlier phenomenological studies. Using an average of the ETMC and RBC-UKQCD results, we analyze μ K in natural supersymmetry (SUSY). This scenario arises as a consistent BSM framework after the latest results from the LHC. The analysis is improved with respect to previous studies including next-to-leading order matching conditions of order αs3. We derive new bounds for SUSY mass insertions in the scenario with a light third generation and study the implications for squark and gluino masses, compared with direct searches at the LHC. Assuming natural values for the flavor-violating SUSY couplings of both chiralities, we find that the sbottom must be heavier than 3TeV for a gluino mass up to 10TeV. In this scenario no natural values for squark and gluino masses can satisfy the flavor bounds. © 2012 American Physical Society.