Realistic constraints on the doubly charged bilepton couplings from Bhabha scattering with LEP data

Upper limits on doubly charged bilepton couplings and masses are extracted from LEP data for Bhabha scattering at energy range $\sqrt{s}=183-202$ GeV using standard model program ZFITTER which calculates radiative corrections. We find that $g_L^2\mathrm{/}{M}_L^2<O({10}^{-5})Ge{V}^{-2}$ at 95% C.L. for scalar and vector bileptons.