Zoom Codes for KIAS HEP zoom seminars :
* make sure you are mute, unless you are speaking
- can ask questions any time with unmuting
- video preferred when asking a question and discuss
- please use your first and last name on Zoom. Nickname or abbreviation is not allowed

2021 Fall KIAS HEP Seminar Series

Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity

Name: Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity
Start: 2021-12-14T16:00:00+09:00
End: 2021-12-14T17:30:00+09:00
Location: KIAS

by Prof. Natsumi Nagata (University of Tokyo)

Tuesday 14 Dec 2021, 16:00 → 17:30 Asia/Seoul

1423 in building 1 (KIAS)

1423 in building 1

KIAS

Description

Title: Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity

Speaker: Prof. Natsumi Nagata (University of Tokyo)

Abstract: It is known that gravitational instantons, or Euclidean wormholes, induce the Peccei-Quinn symmetry breaking effects, spoiling the Peccei-Quinn solution to the strong CP problem. In this talk, I will first review this argument based on some old studies. I will then discuss that this U(1)-breaking effect can sufficiently be suppressed if the Peccei-Quinn field has a non-minimal coupling to gravity. The required size of the non-minimal coupling can be compatible with that needed for successful inflation, where the Peccei-Quinn scalar field plays the role of inflaton.

82703534248

KIAS HEP-PH Organizer

52739889

Choose timezone

Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity

by Prof. Natsumi Nagata (University of Tokyo)

1423 in building 1

KIAS