|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
New method of computing the contributions of graphs without lepton loops to the electron anomalous magnetic moment in QEDстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 декабря 2017 г.
- Автор: Volkov Sergey
- Журнал: Physical Review D
- Том: 96
- Номер: 9
- Год издания: 2017
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 096018
- DOI: 10.1103/PhysRevD.96.096018
- Аннотация: This paper presents a new method of numerical computation of the mass-independent QED contributions to the electron anomalous magnetic moment which arise from Feynman graphs without closed electron loops. The method is based on a forestlike subtraction formula that removes all ultraviolet and infrared divergences in each Feynman graph before integration in Feynman-parametric space. The integration is performed by an importance sampling Monte-Carlo algorithm with the probability density function that is constructed for each Feynman graph individually. The method is fully automated at any order of the perturbation series. The results of applying the method to 2-loop, 3-loop, 4-loop Feynman graphs, and to some individual 5-loop graphs are presented, as well as the comparison of this method with other ones with respect to Monte Carlo convergence speed.
- Добавил в систему: Волков Сергей Александрович