Constraining the Lorentz-violating bumblebee vector field with big bang nucleosynthesis and gravitational baryogenesis [PDF]
The European Physical Journal C, 2022 By assuming the cosmological principle i.e., an isotropic and homogeneous universe, we consider the cosmology of a vector-tensor theory of gravitation known as the bumblebee model.
Mohsen Khodadi, G. Lambiase, A. Sheykhi
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Big bang nucleosynthesis constraints on varying electron mass solution to the Hubble tension [PDF]
Physical Review D, 2022 A cosmological model with a time-varying mass of electrons seems a promising solution for the so-called Hubble tension. We examine the big bang nucleosynthesis (BBN) constraints on the time-varying electron mass model, because a larger electron mass ...
O. Seto, Y. Toda
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Neutron Lifetime Anomaly and Big Bang Nucleosynthesis [PDF]
Canadian journal of physics (Print), 2022 We calculate the Big Bang Nucleosynthesis abundances for helium-4 and deuterium for a range of neutron lifetimes, τn = 840 - 1050 s, using the state-of-the-art Python package PRyMordial.
Tammi Chowdhury, Seyda Ipek
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Joint Cosmic Microwave Background and Big Bang Nucleosynthesis Constraints on Light Dark Sectors with Dark Radiation. [PDF]
Physical Review Letters, 2021 Dark sectors provide a compelling theoretical framework for thermally producing sub-GeV dark matter, and motivate an expansive new accelerator and direct-detection experimental program. We demonstrate the power of constraining such dark sectors using the
Cara Giovanetti +3 more
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Big bang nucleosynthesis constraints on higher-order modified gravities [PDF]
Physical Review D, 2021 We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on higher-order modified gravity, and in particular on: (i) $f(G)$ Gauss-Bonnet gravity, and $f(P)$ cubic gravities, arising respectively through the use of the quadratic-curvature
Petros Asimakis +3 more
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Solving the Hubble tension without spoiling big bang nucleosynthesis [PDF]
, 2021 The Hubble parameter inferred from cosmic microwave background observations is consistently lower than that from local measurements, which could hint towards new physics.
Guo-Yuan Huang, W. Rodejohann
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Dynamical screening effects on big bang nucleosynthesis [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 A moving ion in plasma creates a deformed electric potential depending on the ion velocity, which leads to the distinct screening effect compared to the standard static Salpeter formula.
Eunseok Hwang +8 more
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Improved big bang nucleosynthesis constraints on heavy neutral leptons
Physical Review D, 2021 We constrain the lifetime of thermally produced heavy neutral leptons (HNLs) from big bang nucleosynthesis. We show that even a small fraction of mesons present in the primeval plasma leads to the overproduction of primordial helium-4.
A. Boyarsky +3 more
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An extended analysis of Heavy Neutral Leptons during Big Bang Nucleosynthesis [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 Heavy Neutral Leptons (HNLs) are strongly motivated by theory due to their capability of simultaneously explaining the observed phenomena of dark matter, neutrino oscillations and the baryon asymmetry of the Universe.
N. Sabti, Andrii Magalich, A. Filimonova
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The impact of new d(p,γ)3 rates on Big Bang Nucleosynthesis
Journal of Cosmology and Astroparticle Physics, 2021 We consider the effect on Big Bang Nucleosynthesis (BBN) of new measurements of the d(p,γ)3 cross section by the LUNA Collaboration. These have an important effect on the primordial abundance of D/H which is also sensitive to the baryon density at the ...
Tsung-Han Yeh, K. Olive, B. Fields
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