Beschreibung
Recent developments in computing cosmological dressing rules have produced different formalism to compute the correlator and thus aid study of their properties. Dressing rules [2503.10598] and the spectral representation (KLF) are two such recent results being used to compute correlators. Dressing rules were derived as a way to add additional propagators to use the flat space feynman rules to compute the corresponding de sitter correlators. These were until now, only proven for conformally coupled and massless scalar fields. KLF is essentially a comprehensive formalisation of the spectral methods being used in the de Sitter correlators. However, there is a clean connection between these two seemingly distinct developments. This connection enables us to formulate dressing rules on a stronger and more general setting, than that derived until now. We can essentially use this connection to formulate dressing rules for more general masses. The connection is mainly via the delta function decomposition that can be done in multiple ways leading to different representations.