Speaker:

Ryuichiro Kitano

Institution:

KEK

Date:

Wednesday, September 29, 2021

Time:

4:00 pm

Location:

Zoom Seminar

***Please Note Special Time**

**Abstract:**

We perform a numerical computation of the anomalous magnetic moment (g−2) of the electron in QED by using the stochastic perturbation theory. Formulating QED on the lattice, we develop a method to calculate the coefficients of the perturbative series of g−2 without the use of the Feynman diagrams. We demonstrate the feasibility of the method by performing a computation up to the alpha

^{3}order and compare with the known results. This program provides us with a totally independent check of the results obtained by the Feynman diagrams and will be useful for the estimations of not-yet-calculated higher order values. This work provides an example of the application of the numerical stochastic perturbation theory to physical quantities, for which the external states have to be taken on-shell.

Host:

Yuri Shirman