Gravitational Contributions to Running of Gauge Couplings  

作　　者：汤勇 吴岳良 

机构地区：[1]Kavli Institute for Theoretical Physics China(KITPC),Key Laboratory of Frontiers in Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Science

出　　处：《Communications in Theoretical Physics》2010年第12期1040-1044,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.10821504,10491306,10975170; the Project of Knowledge Innovation Program of Chinese Academy of Science

摘　　要：Gravitational contributions to the running of gauge couplings are calculated by using different regularizationschemes.As the β function concerns counter-terms of dimension four, only quadratic divergences from the gravitationalcontributions need to be investigated.A consistent result is obtained by using a symmetry-preserving loop regularizationwith string-mode regulators which can appropriately treat the quadratic divergences and preserve non-abelian gaugesymmetry.The harmonic gauge condition for gravity is used in both diagrammatical and background field calculations,the resulting gravitational corrections to the β function are found to be nonzero, which is different from previous resultspresented in the existing literatures.

关 键 词：quantum gravity unification ASYMPTOTIC 

分 类 号：O314[理学—一般力学与力学基础] TH133.4[理学—力学]