  Various new physics models, e.g., theories of compositeness, can accommodate
the color singlet excited leptons that interact with the leptons, quarks,
leptoquarks, etc. A particular type of excited lepton, which at low energies
interacts with the Standard Model fermions mainly through the four-fermion
coupling to lepton and quark-antiquark (or lepton-antilepton) pair, we call
leptomeson. These new particles may contribute to variety of the experimental
anomalies such as the discrepancy in the muon g-2. We propose that the
leptomesons can generate also the baryon asymmetry that explains the imbalance
in ordinary matter and antimatter in the observable universe. We consider the
two types of scenarios for this baryogenesis via leptogenesis to occur from
either leptomeson oscillations or decays. Both possibilities do not contradict
to the small masses of the observable neutrinos and the proton stability.
Moreover they can be relevant for the near future collider experiments and do
not suffer from the gravitino problem.
