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• W2000793053 abstract "The injections of energetic hadrons could have occurred in the early Universe by decays of hypothetical long-lived exotic particles. The injections induce the showers of nonthermal hadrons via nuclear scattering. Neutrons generated at these events can react with $^{7}mathrm{Be}$ nuclei and reduce $^{7}mathrm{Be}$ abundance solving a problem of the primordial $^{7}mathrm{Li}$ abundance. We suggest that thermal neutron injection is a way to derive a model independent conservative limit on the relation between abundances of D and $^{7}mathrm{Li}$ in hadronic energy injection models. We emphasize that an uncertainty in cross sections of inelastic $n+p$ scattering affects the total number of induced neutrons, which determines final abundances of D and $^{7}mathrm{Li}$. In addition, the annihilations of antinucleons with $^{4}mathrm{He}$ result in higher D abundance and trigger nonthermal $^{6}mathrm{Li}$ production. It is concluded that a reduction of $^{7}mathrm{Li}$ abundance from a value in the standard big bang nucleosynthesis (BBN) model down to an observational 2 $ensuremath{sigma}$ upper limit is necessarily accompanied by an undesirable increase of D abundance up to at least an observational $12text{ }text{ }ensuremath{sigma}$ upper limit from observations of quasistellar object absorption line systems. The effects of antinucleons and secondary particles produced in the hadronic showers always lead to a severer constraint. The BBN models involving any injections of extra neutrons are thus unlikely to reproduce a small $^{7}mathrm{Li}$ abundance consistent with observations." @default.
• W2000793053 created "2016-06-24" @default.
• W2000793053 creator A5025870780 @default.
• W2000793053 creator A5039864931 @default.
• W2000793053 creator A5046438858 @default.
• W2000793053 date "2014-08-06" @default.
• W2000793053 modified "2023-10-02" @default.
• W2000793053 title "General limit on the relation between abundances of D and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Li</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>in big bang nucleosynthesis with nucleon injections" @default.
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• W2000793053 doi "https://doi.org/10.1103/physrevd.90.045009" @default.
• W2000793053 hasPublicationYear "2014" @default.
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