Work

Differential equations for tree-level cosmological correlators with massive states

Year: 2025

Type: article

Abstract: A bstract 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.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep09(2025)043

Authors: Federico Gasparotto, Pouria Mazloumi, Xiaofeng Xu

Institutions: Johannes Gutenberg University Mainz, Mainz Institute for Theoretical Physics

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: European Commission, Deutsche Forschungsgemeinschaft, HORIZON EUROPE European Research Council