On the Uniqueness of Ghost-Free Special Gravity  

作　　者：Dong Bai Yu-Hang Xing 柏栋;邢宇航(Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;School of Physical Sciences, University of Chinese Academy of Sciences)

机构地区：[1]Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 China [2]School of Physical Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China

出　　处：《Communications in Theoretical Physics》2017年第9期329-334,共6页理论物理通讯（英文版）

摘　　要：Special gravity refers to interacting theories of massless gravitons in Minkowski space-time which are invariant under the abelian gauge invariance hab → hab ＋ δ（axb） only. In this article we determine the most general form of special gravity free of Ostrogradski ghosts, meaning its equation of motion is of at most second order. Together with the recent works, this result could be helpful in formulating proofs of General Relativity as the unique physical theory of self-interacting massless gravitons. We also study how to construct gauge invariant couplings to matter fields.

关 键 词：abelian gauge invariance massless graviton matter couplings 

分 类 号：O412.1[理学—理论物理]