A bilepton is any of a proposed form of gauge boson with a
lepton number of two.
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jb
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muon
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Lepton wavelength and spin are not related. Leptons have a spin
of 1/2 regardless of wavelength.
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There is currently no scientific evidence for any constituents
of an electron. So, for now, the electron is a lepton (a lepton is
any fundamental particle).