Leptogenesis with GeV-Scale Right-Handed Neutrinos

5th Symposium on Prospects in the Physics of Discrete Symmetries

Drewes, Marco^1 ; Garbrecht, Björn^1 ; Klari, Juraj^1 ; Gueter, Dario^1

Physik-Department T70, Technische Universität München, James-Franck-Straße, Garching

85748, Germany^1

关键词: Closed time paths;    Discrete symmetry;    Early universe;    Experimental test;    Kinetic equations;    Right-handed neutrinos;    Time-reversal invariance;    Unified description;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/873/1/012027/pdf
DOI  :  10.1088/1742-6596/873/1/012027

来源: IOP

【 摘 要 】

We review the relation between leptogenesis and the discrete symmetry of charge-parity conjugation. The requirement of respecting the theorem of combined charge-parity-time reversal invariance at the level of the kinetic equations describing leptogenesis in the early Universe poses an interesting challenge that may most efficiently be addressed by the use of closed-time-path techniques. A byproduct of these methods is an accurate and unified description of leptogenesis from oscillations of right-handed neutrinos that applies to the regime of ultraheavy as well as GeV-scale RHNs. For the latter scenario, we discuss the mechanism on the example of the osicllatory and overdamped parametric regimes and very briefly comment on the prospect of experimental tests.