On two-loop effective action of 2d sigma model

被引：2

作者：

Akacevich, P. V. ^{[1
,2
]}

Ivanov, A. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Steklov Math Inst, St Petersburg Dept, 27 Fontanka, St Petersburg 191023, Russia

[2] Leonhard Euler Int Math Inst, 10 Pesochnaya Nab, St Petersburg 197022, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2023年 / 83卷 / 07期

关键词：

HEAT KERNEL; QUANTUM-THEORY; GAUGE; RENORMALIZATION; DIMENSIONS; REGULARIZATION; GRAVITY; MATRIX;

D O I：

10.1140/epjc/s10052-023-11797-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper, we study two-loop contribution to the effective action of a two-dimensional non-linear sigma model. We derive a new formula, which can be applicable to a regularization of general type. As examples, we obtain known results for the dimensional regularization and investigate new types of a cutoff one. Also, we discuss non-local contributions and restrictions on the regularization.

引用

页数：8

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