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arXiv · 2411.05632

Differential equations for tree--level cosmological correlators with massive states

Federico Gasparotto·Pouria Mazloumi·Xiaofeng Xu
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Abstract

We study mathematical aspects concerning two site tree-level cosmological correlators with massive internal and external states in a de Sitter universe. We employ integration by parts identities, (relative) twisted cohomology and the method of differential equations. We explicitly express the internally massive, externally conformally coupled correlator as a power series with respect to a small mass parameter, where the various terms in the series are given by multiple polylogarithms.

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Federico Gasparotto, Pouria Mazloumi, Xiaofeng Xu. 2024-11-08. Differential equations for tree--level cosmological correlators with massive states. https://doi.org/10.1007/jhep09(2025)043

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