KEK素粒子原子核研究所 理論セミナー ( 仁尾 真紀子 氏 )

---

概要

(Abstract)

Any precision tests of the elementary particles are carried out on the assumption that the fine-structure constant alpha is sufficiently known.

Currently, there are two methods that provide equally accurate values of the alpha. One is the electron g-2 measurement together with its theoretical prediction from the QED theory. The other is the quotient of the Planck constant and the atomic mass (h/M) determined by using an atomic interferometer. I will report recent progress in both determination of the alpha including our own work on the five-loop QED calculation of the electron g-2.