Leptogenesis for pedestrians

摘要: Abstract During the process of thermal leptogenesis temperature decreases by about one order magnitude while baryon asymmetry is generated. We present an analytical description this so that dependence on neutrino mass parameters becomes transparent. In case maximal CP all decay and scattering rates in plasma are determined M1 decaying heavy Majorana neutrino, effective light m ∼ 1 absolute scale ¯ neutrinos. range suggested oscillations, sol ≃ 8 × 10 - 3 eV ≲ atm 5 2 , dominated just decays inverse decays. The effect other processes lies within theoretical uncertainty calculations. final dominantly produced at a TB which can be below M1. also derive expression for upper bound masses implied successful leptogenesis.