Abstract
The excited leptons that share the quantum numbers with the Standard Model leptons but have larger masses are widespread in many promising new physics theories. A subclass of excited leptons that at low energies interact with the SM fermions dominantly through the effective coupling to lepton and fermion-antifermion pair can be referred as leptomesons. I introduce possible generation of the baryon asymmetry of the universe using these new particles. The discussed baryogenesis mechanisms do not contradict to the small neutrino masses and the proton stability, and can be interesting for the collider experiments.
Highlights
In spite of the present success of the Standard Model (SM) several observations indicate its possible nonfundamentality: large number of the SM fermions, their arbitrary masses and mixings, fractional electric charge of quarks, etc
Among the diversity of new physics models the theories of compositeness [1,2,3,4,5,6,7,8] try to solve these problems by introducing a substructure of the SM particles, which subcomponents are commonly referred as preons [1]
Possible scenarios of dynamical generation of the baryon asymmetry during the evolution of the universe from a hot early matter-antimatter symmetric stage are referred as the baryogenesis (BG) mechanisms [10, 11], and include new physics
Summary
In spite of the present success of the Standard Model (SM) several observations indicate its possible nonfundamentality: large number of the SM fermions, their arbitrary masses and mixings, fractional electric charge of quarks, etc. Besides the outlined issues on the particles and their interactions that come from the laboratory studies, another opened questions (including the dark matter problem) arise from the astrophysical observations of the universe around us. Our universe appears to be populated exclusively with baryonic matter rather than antimatter [9]. Possible scenarios of dynamical generation of the baryon asymmetry during the evolution of the universe from a hot early matter-antimatter symmetric stage are referred as the baryogenesis (BG) mechanisms [10, 11], and include new physics.
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