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Cosmological Constraints on Late-time Entropy Production
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We investigate cosmological effects concerning the late-time entropy production due to the decay of non-relativistic massive particles. The thermalization process of neutrinos after the entropy production is properly solved by using the Boltzmann equation. If a large entropy production takes place at late time t$\simeq$ 1 sec, it is found that a large fraction of neutrinos cannot be thermalized. This fact loosens the tight constraint on the reheating temperature T_R from the big bang nucleosynthesis and T_R could be as low as 0.5 MeV. The influence on the large scale structure formation and cosmic microwave background anisotropies is also discussed.
Forward citations
Cited by 15 Pith papers
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From Rags to Jeans: Axion Miniclusters from Early matter domination
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Gravitational wave emission from nonspherical collapse in an early matter-dominated era using N-body simulations
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Exploring Leptogenesis in the Era of First Order Electroweak Phase Transition
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Exponential Quintessence: Analytic Relationship Between the Current Equation of State Parameter and the Potential Parameter
For an exponential quintessence potential, an analytic formula links the current equation-of-state w_φ0 to the potential slope λ while enforcing prior radiation and matter domination, yielding the bound λ < 1.94 at Ω_...
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Reviving Motivated Inflationary Potentials with $K$-inflation in the light of ACT
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