When:
Monday, June 5, 2017
4:00 PM - 5:00 PM CT
Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it
Audience: Public
Contact:
Pamela Villalovoz
(847) 491-3644
Group: Physics and Astronomy High Energy Physics Seminars
Category: Academic
Title: Leptogenesis via Weinberg operator
Speaker: Ye-Ling Zhou, Durham University
Abstract: I will talk about a novel mechanism of leptogenesis. It requires only a time-varying Weinberg operator. The Weinberg operator is well-known for the motivation of generating light neutrino masses. It violates lepton number and can provide out of equilibrium dynamics in the early universe due to the suppression of tiny neutrino masses. A lot of underlying symmetries, e.g., B-L symmetry and flavour symmetries, have been proposed in the lepton sector. These symmetries strongly motivate the existence of phase transitions at high scales. The phase transition induce a varying Weinberg operator, and the lepton asymmetry can be generated by the interference of the Weinberg operator at different times. Any heave BSM particles, e.g., right-handed neutrinos, are not necessary in this mechanism.
Keywords: Physics, Astronomy, HEP