2022
06/07
OPEN
Date
2022/06/07（Tue）11:00～12:00
Venue
Online (Zoom)
Speaker
Prof. Hajime Fukuda (The University of Tokyo）
Language
English
URL
Contact
Motoo Suzuki / mtsuzuki-AT-post.kek.jp
Overview
Because the axion is a pseudo-scalar Boson, as the interaction between axions and matter, spin-dependent interactions have been mainly discussed up to the present.
Spin-independent terms, which break the axion shift symmetry, are considered to be small, being suppressed by the axion mass.
However, we have found that couplings of 4-point interactions between nucleons and axions are not negligibly small.
The term is of particular importance for the axion dark matter, which has a long Compton length, because the scattering amplitude is enhanced by the coherent effect.
We discuss the consequences and the possible application of the interactions.