S. Davidson et al., MODEL-INDEPENDENT CONSTRAINTS ON LEPTOQUARKS FROM RARE PROCESSES, Zeitschrift fur Physik. C, Particles and fields, 61(4), 1994, pp. 613-643
We present model independent constraints on the masses and couplings t
o fermions of B and L conserving leptoquarks. Such vector or scalar pa
rticles could have masses below 100 GeV and be produced at HERA; we li
st the generation dependent bounds that can be calculated from rare le
pton and meson decays, meson-anti-meson mixing and various electroweak
tests.