Matches in SemOpenAlex for { <https://semopenalex.org/work/W4386694428> ?p ?o ?g. }
Showing items 1 to 61 of
61
with 100 items per page.
- W4386694428 abstract "We examine the effects of a stiff pre-recombination era on the present day's energy spectrum of the primordial gravitational waves. If the background total equation of state parameter at the pre-recombination era is described by a kination era one, this directly affects the modes with characteristic wavenumbers which reenter the Hubble horizon during this stiff era. The stiff era causes a broken-power-law effect on the energy spectrum of the gravitational waves. We use two approaches, one model agnostic and a specific model that can realize this scenario. In all cases, the inflationary era can be realized either by some theory leading to a standard red-tilted tensor spectral index or by some theory which has a mild tensor spectral index $n_{mathcal{T}}=0.17-3.7$ like an Einstein-Gauss-Bonnet theory. For the model agnostic scenario case, the NANOGrav signal can be explained by the stiff pre-recombination era combined with an inflationary era with a mild blue-tilted tensor spectral index $n_{mathcal{T}}=3.7$ and a low-reheating temperature $T_Rsim 0.1$GeV. In the same case, the red-tilted inflationary theory signal can be detectable by the future LISA, BBO and DECIGO experiments. The model dependent approach is based on a Higgs-axion model which can yield multiple deformations of the background total equation of state parameter, causing multiple broken-power-law behaviors occurring in various eras before and after the recombination era. In this case, the NANOGrav signal is explained by this model in conjunction with an inflationary era with a really mild blue-tilted tensor spectral index $n_{mathcal{T}}=0.17$ and a low-reheating temperature $T_Rsim 20,$GeV. In this case, the signal can be detectable by the future Litebird experiment, which is a very characteristic pattern in the tail of the primordial gravitational wave energy spectrum." @default.
- W4386694428 created "2023-09-14" @default.
- W4386694428 creator A5021272359 @default.
- W4386694428 date "2023-09-09" @default.
- W4386694428 modified "2023-10-18" @default.
- W4386694428 title "A Stiff Pre-CMB Era with a Mildly Blue-tilted Tensor Inflationary Era can Explain the 2023 NANOGrav Signal" @default.
- W4386694428 doi "https://doi.org/10.48550/arxiv.2309.04850" @default.
- W4386694428 hasPublicationYear "2023" @default.
- W4386694428 type Work @default.
- W4386694428 citedByCount "0" @default.
- W4386694428 crossrefType "posted-content" @default.
- W4386694428 hasAuthorship W4386694428A5021272359 @default.
- W4386694428 hasBestOaLocation W43866944281 @default.
- W4386694428 hasConcept C105795698 @default.
- W4386694428 hasConcept C121332964 @default.
- W4386694428 hasConcept C155281189 @default.
- W4386694428 hasConcept C168110828 @default.
- W4386694428 hasConcept C190330329 @default.
- W4386694428 hasConcept C200941418 @default.
- W4386694428 hasConcept C202444582 @default.
- W4386694428 hasConcept C207297109 @default.
- W4386694428 hasConcept C33332235 @default.
- W4386694428 hasConcept C33923547 @default.
- W4386694428 hasConcept C37914503 @default.
- W4386694428 hasConcept C42061751 @default.
- W4386694428 hasConcept C44870925 @default.
- W4386694428 hasConcept C4839761 @default.
- W4386694428 hasConcept C62520636 @default.
- W4386694428 hasConcept C85725439 @default.
- W4386694428 hasConceptScore W4386694428C105795698 @default.
- W4386694428 hasConceptScore W4386694428C121332964 @default.
- W4386694428 hasConceptScore W4386694428C155281189 @default.
- W4386694428 hasConceptScore W4386694428C168110828 @default.
- W4386694428 hasConceptScore W4386694428C190330329 @default.
- W4386694428 hasConceptScore W4386694428C200941418 @default.
- W4386694428 hasConceptScore W4386694428C202444582 @default.
- W4386694428 hasConceptScore W4386694428C207297109 @default.
- W4386694428 hasConceptScore W4386694428C33332235 @default.
- W4386694428 hasConceptScore W4386694428C33923547 @default.
- W4386694428 hasConceptScore W4386694428C37914503 @default.
- W4386694428 hasConceptScore W4386694428C42061751 @default.
- W4386694428 hasConceptScore W4386694428C44870925 @default.
- W4386694428 hasConceptScore W4386694428C4839761 @default.
- W4386694428 hasConceptScore W4386694428C62520636 @default.
- W4386694428 hasConceptScore W4386694428C85725439 @default.
- W4386694428 hasLocation W43866944281 @default.
- W4386694428 hasOpenAccess W4386694428 @default.
- W4386694428 hasPrimaryLocation W43866944281 @default.
- W4386694428 hasRelatedWork W1976214455 @default.
- W4386694428 hasRelatedWork W1976497784 @default.
- W4386694428 hasRelatedWork W2024932160 @default.
- W4386694428 hasRelatedWork W2045621493 @default.
- W4386694428 hasRelatedWork W2075078583 @default.
- W4386694428 hasRelatedWork W2580357840 @default.
- W4386694428 hasRelatedWork W3104434317 @default.
- W4386694428 hasRelatedWork W3125593085 @default.
- W4386694428 hasRelatedWork W4320843408 @default.
- W4386694428 hasRelatedWork W53286707 @default.
- W4386694428 isParatext "false" @default.
- W4386694428 isRetracted "false" @default.
- W4386694428 workType "article" @default.