Bounds on leptoquark parameters with nonvanishing leptoquark-Higgs couplings

Non-vanishing leptoquark-Higgs couplings result in mixing of different leptoquark (LQ) SU(2)L multiplets leading to new low energy four fermion vertices. The rare process KL → μ±e∓ is explored in order to derive bounds on the LQ parameter space when LQ mixing-matrices are taken into account.