Speaker
Dr
Ye-Ling Zhou
(IPPP, Durham University)
Description
This talk will focus on a totally new mechanism of leptogenesis we proposed recently. It requires only the Weinberg operator and a phase transition at a sufficiently high scale. While the Weinberg operator is used to generate light neutrino masses, phase transition is strongly motivated by the breaking of some underlying symmetries, such as B-L symmetry and flavour symmetries. During the phase transition, the coupling of Weinberg operator is time-dependent, and the lepton asymmetry is generated by the interference of Weinberg operator at different times. Any heave BSM particles, e.g., right-handed neutrinos, are not necessary in this mechanism.
Primary author
Dr
Ye-Ling Zhou
(IPPP, Durham University)