Gravitational Contributions to Running of Gauge Couplings

被引：38

作者：

Tang Yong ^{[1
]}

Wu Yue-Liang ^{[1
]}

机构：

[1] Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2010年 / 54卷 / 06期

基金：

中国国家自然科学基金;

关键词：

quantum gravity; unification; asymptotic; ONE-LOOP DIVERGENCES; REGULARIZATION; RENORMALIZATION;

D O I：

10.1088/0253-6102/54/6/15

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Gravitational contributions to the running of gauge couplings are calculated by using different regularization schemes. As the beta function concerns counter-terms of dimension four, only quadratic divergences from the gravitational contributions need to be investigated. A consistent result is obtained by using asymmetry-preserving loop regularization with string-mode regulators which can appropriately treat the quadratic divergences and preserve non-abelian gauge symmetry. The harmonic gauge condition for gravity is used in both diagrammatical and back ground field calculations, the resulting gravitational corrections to the beta function are found to be nonzero, which is different from previous results presented in the existing literatures.

引用

页码：1040 / 1044

页数：5

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