标题： 入-入关联函数的切割规则与宇宙对撞机 显示英文标题

标题： Cutting rule for in-in correlators and cosmological collider

摘要： 我们推导了一个用于等时内-内关联函数的切割规则，包括基于Keldysh $r/a$ 基础上的宇宙学关联函数，该规则将图分解为完全推迟函数和由Wightman函数组成的切割传播子。 我们的推导仅依赖于基本假设，例如幺正性、局域性和内-内形式主义的因果结构，因此适用于任意粒子内容和任意环阶的局部相互作用理论。 作为一个应用，我们在微观因果性的假设下证明了非局域宇宙学对撞机信号仅仅来源于切割传播子。 由于切割传播子不包含(反-)时间顺序theta函数，共形时间积分被因子化，简化了实际计算。 显示英文摘要

摘要： We derive a cutting rule for equal-time in-in correlators including cosmological correlators based on Keldysh $r/a$ basis, which decomposes diagrams into fully retarded functions and cut-propagators consisting of Wightman functions. Our derivation relies only on basic assumptions such as unitarity, locality, and the causal structure of the in-in formalism, and therefore holds for theories with arbitrary particle contents and local interactions at any loop order. As an application, we show that non-local cosmological collider signals arise solely from cut-propagators under the assumption of microcausality. Since the cut-propagators do not contain (anti-)time-ordering theta functions, the conformal time integrals are factorized, simplifying practical calculations.