|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Multiloop contributions to the on-shell-$ øverline\mathrmMS$ heavy quark mass relation in QCD and the asymptotic structure of the corresponding series: the updated considerationстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 декабря 2021 г.
- Авторы: Kataev A.L., Molokoedov V.S.
- Журнал: European Physical Journal C
- Том: 80
- Номер: 12
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Номер статьи: 1160
- DOI: 10.1140/epjc/s10052-020-08673-6
- Аннотация: The asymptotic structure of the QCD perturbativerelation between the on-shell and MS heavy quark masses is studied. We estimate the five and six-loop contributions to this relation by three different techniques. First, the effectivecharges motivated approach in two variants is used. Second, the results following from the large-β0 approximation are analyzed. Finally, the consequences of applying the asymptotic renormalon-based formula are investigated. We showthat all approaches lead to corrections which are qualitatively consistent in order of magnitude. Their sign-alternating character in powers of the number of massless quarks is demonstrated. We emphasize that there is no contradictionin the behavior of the fine structure of the renormalon-based estimates with other approaches if one use the detailed information about the normalization factor included in the renormalon asymptotic formula. The obtained five- and six-loop estimates indicate that in the case of the b-quark the asymptotic character of the studied relation manifests itself above the fourth order of PT, whereas for the t-quark it starts toreveal itself after the seventh order. This allows to conclude that like the running masses, the pole masses of the b and especially t-quark in principle may be used in the phenomenologically-oriented studies.
- Добавил в систему: Молокоедов Виктор Сергеевич