近期活动

INPAC Seminars

The axion dark matter search in South Korea

Prof. Yannis K. Semertzidis, Director of Center for Axion and Precision Physics, IBS, Korea Advanced Inst. of Science and Technology
Wed, 2016-03-23 13:00 - 14:00
INPAC Meeting room(上海交通大学粒子物理宇宙学研究所,包玉刚图书馆东楼四楼(从北门进))

Axions are the result of a dynamic field, similar to Higgs field, invented to solve the so-called Strong CP-problem, i.e., why the electric dipole moment of the neutron has not been observed so far even though the theory of QCD suggests otherwise.  Axions as dark matter can be thought of as an oscillatory field interacting very weakly with normal matter other than gravitationally.  The oscillation frequency is unknown, it can be anywhere between 200MHz to 200GHz and it’s expected to be a very narrow line, about df/f=10^-6.  A very strong magnetic field can be used to convert part of that field into a very weak electric field oscillating at the same frequency as the axion field.  In the coming years we plan to develop our experimental sensitivity to either observe or refute the axions as a viable dark matter candidate.