标题： 天体两点函数和校正词典 显示英文标题

标题： Celestial two-point functions and rectified dictionary

摘要： 一个原始的天体字典导致无质量两点函数在天体共形场理论（CCFT）中呈现狄拉克δ函数形式。我们修正了字典，涉及影子变换，使得两点函数遵循标准的幂律。在这个新定义中，我们可以平滑地取质量字典的无质量极限。我们还使用新字典计算了一个三点函数，并讨论了CCFT中的OPE。 显示英文摘要

摘要： A naive celestial dictionary causes massless two-point functions to take the delta-function forms in the celestial conformal field theory (CCFT). We rectify the dictionary, involving the shadow transformation so that the two-point functions follow the standard power-law. In this new definition, we can smoothly take the massless limit of the massive dictionary. We also compute a three-point function using the new dictionary and discuss the OPE in CCFT.