论文标题
重新访问天体CFT中的阴影应力张量
Revisiting the Shadow Stress Tensor in Celestial CFT
论文作者
论文摘要
我们重新审视天体应力张量的标准构造，作为旋律柔软重力的阴影。在其原始配方中，有一个障碍物可以在双重限制中重现预期的TT OPE。我们提出了对定义的修改，该定义规避了这种障碍，然后将基础变化扩展到了柔软和单个螺旋部门之外。在此过程中，我们研究了（非）双软限制的（非）交通性与主要后代的脱钩以及我们对天体基础的选择如何确定哪些对称性在MHV部门以外的OPE级别上表现出来。
We revisit the standard construction of the celestial stress tensor as a shadow of the subleading conformally soft graviton. In its original formulation there is an obstruction to reproducing the expected TT OPE in the double soft limit. We propose a modification to the definition which circumvents this obstruction and then extend this change of basis beyond the conformally soft and single helicity sectors. In the process we investigate how (non)-commutativity of double soft limits is tied to the decoupling of primary descendants, and how our choice of celestial basis determines which symmetries are manifest at the level of the OPE beyond the MHV sector.
