English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

This is the second in a series of papers investigating the formulation of thesimplified Dark Matter models with graviton mediators in cosmologicalbackgrounds. We address here the crucial problem of the fundamental observableof interest, namely the graviton spectrum in a FRW cosmological background withan arbitrary Dark Matter background component. We calculate the correction tothe free graviton two-point function up to the second order in the couplingconstant between the Dark Matter and the graviton in the simplified Dark Mattermodel with graviton mediators approach in the de Sitter space. Our result ismodel independent in the sense that it does not depend on the particular formof the Dark Matter fields. Also, due to the universality of the interactionbetween the Dark Matter and the graviton, the result obtained here apply to theinteraction between the baryonic matter and the gravitons. As an application,we discuss in detail the massive scalar Dark Matter model and calculate thefirst order correction to the two-point function due to two Dark Matter modesin the adiabatic regime.

Graviton spectrum in simplified Dark Matter models with graviton mediators in the de Sitter space