Northwestern Events Calendar

Jun
5
2017

Ye-Ling Zhou: Leptogenesis via Weinberg operator

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

Description:

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

Add to Calendar

Add Event To My Group:

Please sign-in