Matches in SemOpenAlex for { <https://semopenalex.org/work/W4306176144> ?p ?o ?g. }
Showing items 1 to 63 of
63
with 100 items per page.
- W4306176144 abstract "We show that a minimal scenario, utilizing only the graviton as an intermediate messenger between the inflaton, the dark sector and the Standard Model (SM), is able to generate $simultaneously$ the observed relic density of dark matter (DM), the baryon asymmetry through leptogenesis, as well as a sufficiently hot thermal bath after inflation. We assume an inflaton potential of the form $V(phi)propto phi^k$ about the minimum at the end of inflation. The possibility of reheating via minimal gravitational interactions has been excluded by constraints on dark radiation for excessive gravitational waves produced from inflation. We thus extend the minimal model in several ways: i) we consider non-minimal gravitational couplings--this points to the parameter range of DM masses $M_{N_1} simeq 2-10 $ PeV, and right-handed neutrino masses $M_{N_2} simeq (5-20) times 10^{11}$ GeV, and $T_text{rh} lesssim 3 times 10^5$ GeV (for $k le 20$); ii) we propose an explanation for the PeV excess observed by IceCube when the DM has a direct but small Yukawa coupling to the SM; and iii) we also propose a novel scenario, where the gravitational production of DM is a two-step process, first through the production of two scalars, which then decay to fermionic DM final states. In this case, the absence of a helicity suppression enhances the production of DM and baryon asymmetry, and allows a great range for the parameters including a dark matter mass below an MeV where dark matter warmness can be observable by cosmic 21-cm lines, even when gravitational interactions are responsible for reheating. We also show that detectable primordial gravitational wave signals provide the opportunity to probe this scenario for $T_text{rh}lesssim 5times 10^6$ GeV in future experiments, such as BBO, DECIGO, CE and ET." @default.
- W4306176144 created "2022-10-14" @default.
- W4306176144 creator A5032860612 @default.
- W4306176144 creator A5053300152 @default.
- W4306176144 creator A5057257666 @default.
- W4306176144 creator A5075475814 @default.
- W4306176144 creator A5089624314 @default.
- W4306176144 date "2022-10-11" @default.
- W4306176144 modified "2023-09-27" @default.
- W4306176144 title "Gravity as a Portal to Reheating, Leptogenesis and Dark Matter" @default.
- W4306176144 doi "https://doi.org/10.48550/arxiv.2210.05716" @default.
- W4306176144 hasPublicationYear "2022" @default.
- W4306176144 type Work @default.
- W4306176144 citedByCount "0" @default.
- W4306176144 crossrefType "posted-content" @default.
- W4306176144 hasAuthorship W4306176144A5032860612 @default.
- W4306176144 hasAuthorship W4306176144A5053300152 @default.
- W4306176144 hasAuthorship W4306176144A5057257666 @default.
- W4306176144 hasAuthorship W4306176144A5075475814 @default.
- W4306176144 hasAuthorship W4306176144A5089624314 @default.
- W4306176144 hasBestOaLocation W43061761441 @default.
- W4306176144 hasConcept C109214941 @default.
- W4306176144 hasConcept C121332964 @default.
- W4306176144 hasConcept C147120987 @default.
- W4306176144 hasConcept C151195881 @default.
- W4306176144 hasConcept C159249277 @default.
- W4306176144 hasConcept C173153575 @default.
- W4306176144 hasConcept C179203047 @default.
- W4306176144 hasConcept C185544564 @default.
- W4306176144 hasConcept C186453547 @default.
- W4306176144 hasConcept C200941418 @default.
- W4306176144 hasConcept C2779293552 @default.
- W4306176144 hasConcept C2781052526 @default.
- W4306176144 hasConcept C33332235 @default.
- W4306176144 hasConceptScore W4306176144C109214941 @default.
- W4306176144 hasConceptScore W4306176144C121332964 @default.
- W4306176144 hasConceptScore W4306176144C147120987 @default.
- W4306176144 hasConceptScore W4306176144C151195881 @default.
- W4306176144 hasConceptScore W4306176144C159249277 @default.
- W4306176144 hasConceptScore W4306176144C173153575 @default.
- W4306176144 hasConceptScore W4306176144C179203047 @default.
- W4306176144 hasConceptScore W4306176144C185544564 @default.
- W4306176144 hasConceptScore W4306176144C186453547 @default.
- W4306176144 hasConceptScore W4306176144C200941418 @default.
- W4306176144 hasConceptScore W4306176144C2779293552 @default.
- W4306176144 hasConceptScore W4306176144C2781052526 @default.
- W4306176144 hasConceptScore W4306176144C33332235 @default.
- W4306176144 hasLocation W43061761441 @default.
- W4306176144 hasOpenAccess W4306176144 @default.
- W4306176144 hasPrimaryLocation W43061761441 @default.
- W4306176144 hasRelatedWork W1978290733 @default.
- W4306176144 hasRelatedWork W1978379187 @default.
- W4306176144 hasRelatedWork W2007660857 @default.
- W4306176144 hasRelatedWork W2149978023 @default.
- W4306176144 hasRelatedWork W2461168142 @default.
- W4306176144 hasRelatedWork W2790430446 @default.
- W4306176144 hasRelatedWork W3105523912 @default.
- W4306176144 hasRelatedWork W3150118936 @default.
- W4306176144 hasRelatedWork W3197843897 @default.
- W4306176144 hasRelatedWork W4293829997 @default.
- W4306176144 isParatext "false" @default.
- W4306176144 isRetracted "false" @default.
- W4306176144 workType "article" @default.