Muonium -from fundamental to application-

Abstract

Muonium (Mu), which is a bound state of a positively charged muon and an electron, is very similar to the hydrogen atom and plays an interesting role in various studies using muons. In this article, I will briefly introduce the role of muonium in two very different fields of research: fundamental science, such as the precision test of the Standard Model and the search for new physics, and materials science applications, such as the elucidation of the origin of electrical conductivity in wide gap semiconductors.