Derivation of Graviton Propagator by a Symmetric Method
Xi-Yan Fang, Kaixi Feng, Yunfeng Jiang, Huang Weicong, H. H. Zhang · Acta Scientiarum Naturalium Universitatis Sunyatseni · 2010
According to the symmetry of the kernal of the quadratic term in the graviton Lagrangian and the symmetry of the graviton propagator,a complete basis set of building blocks satisfying this symmetry and obtain their product relations is constructed.Using these building blocks,the propagator expressions of the massive Kaluza-Klein graviton and the massless graviton is easily derived,respectively.