Two-loop beta functions without Feynman diagrams

被引：13

作者：

Haagensen, PE

Olsen, K

Schiappa, R

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[2] NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.79.3573

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Starting from a consistency requirement between T-duality symmetry and renormalization group flows, the two-loop metric beta function is found for a d = 2 bosonic sigma model on a generic, torsionless background. The result is obtained without Feynman diagram calculations, and represents further evidence that duality symmetry severely constrains renormalization flows. [S0031-9007(97)04386-X].

引用

页码：3573 / 3576

页数：4