Matter-antimatter asymmetry of the universe

Abstract

The asymmetry of the universe between matter and antimatter in the universe is related to neutrino properties due to non-perturbative processes in the high-temperature symmetric phase of the standard model. We show that the neutrino masses inferred from the solar and atmospheric neutrino anomalies are consistent with the hypothesis that the observed cosmological matter density has been created in decays of heavy Majorana neutrinos in the early universe.

Gentner‐Kastler‐Preis: Verletzung der Symmetrie zwischen Materie und Antimaterie: In einer kleinen Asymmetrie der Naturkräfte sehen wir den Schlüssel zu unserer Existenz

“…In den letzten Jahren wurde z. B. eine CP-Verletzung auf dem Gebiet der geladenen Leptonen und der Neutrinos diskutiert [12]. Danach hätte sich die Asymmetrie zwischen Materie und Antimaterie im frühen Universum bei den Zerfällen sehr schwerer hypothetischer sog.…”

Flavored leptogenesis and Dirac CP violation

“…Leptogenesis is a mechanism by which some lepton-number-violating processes [14][15][16][17] produce lepton asymmetry, which is subsequently converted into baryon asymmetry through the nonperturbative B + L violating but B − L conserving sphaleron processes of the SM [18,19]. Based on the type-I seesaw [15,[20][21][22], numerous frameworks have been proposed (see for instance [23][24][25][26][27][28][29][30][31]), which are motivated by the studies of neutrino mass and a possible explanation for the BAU through the process of leptogenesis. Based on the temperature regime at which leptogenesis is supposed to take place, there are several fields of theoretically consistent frameworks that exist in particular, deal with the characteristic features of lepton asymmetry generation at a certain temperature [32][33][34][35][36].…”