Abstract

The branching ratios of some rare processes, i.e. meson →μe, meson →meson μe, baryon → baryon μe, are calculated in a composite quark and lepton model. Use is made of an effective Hamiltonian which originates from hypercolor singlet 0− and 1− bound state exchange mechanism, acting at a mass scaleMP andMV respectively. Under the reasonable assumptionMP=MV onlyKL→μe puts a significant limit on the composite scale.

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