Laboratory Search for New Spin-dependent Interaction at CAPP, IBS

Abstract

Axions are light pseudo-scalar particles originally proposed to explain the strong CP problem in Standard Model. Axions could also be a possible component of Dark Matter. Direct search of axions is the current experiment at Center for Axion and Precision Physics Research (CAPP). In addition, axions would mediate spin-dependent interactions in macroscopic scale. A precision experiment that detects spin-dependent interactions in long range has been recently proposed. The experiment includes polarized 3He gas and a unpolarized mass to induce a monopole-dipole interaction. The experiment can look into axion mass range between 10-6 eV to 10-3 eV. We describe the experimental plan at CAPP.