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- W3036871354 abstract "The creation of ultra-light dark particles in the late-time FLRW spacetime provides a cosmological model in accordance with precise observational tests. The matter creation backreaction implies in this context a vacuum energy density scaling linearly with the Hubble parameter H, which is consistent with the vacuum expectation value of the QCD condensate in a low-energy expanding spacetime. Both the cosmological constant and coincidence problems are alleviated in this scenario. We also explore the opposite, high energy limit of the particle creation process. We show that it leads to a non-singular primordial universe where an early inflationary era takes place, with natural reheating and exit. The generated primordial spectrum is scale invariant and, by supposing that inflation lasts for 60 e-folds, we obtain a scalar expectral index n ≈ 0.97." @default.
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- W3036871354 date "2012-01-01" @default.
- W3036871354 modified "2023-10-16" @default.
- W3036871354 title "COSMOLOGICAL CONCORDANCE MODEL WITH PARTICLE CREATION" @default.
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- W3036871354 doi "https://doi.org/10.1142/s2010194512008173" @default.
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