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Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem

D. Albornoz Vasquez 1 A. Belikov 1 A. Coc 2 J. Silk 1 E. Vangioni 1
2 CSNSM AN
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : We present a parametrized study of the effects of free thermal neutron injection on primordial nucleosynthesis, where both the rate and the time scale of injection are varied. This generic approach is found to yield a successful solution for reducing the 7Li abundance without causing significant problems to other elemental abundances. Our analysis demonstrates that hadronic injection, possibly due to decays or annihilations of dark matter particles with a mass of about 1 to 30 GeV, provides a possible solution to an outstanding problem in the standard Big Bang model.
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Submitted on : Monday, September 3, 2012 - 11:59:33 AM
Last modification on : Monday, December 14, 2020 - 9:47:28 AM

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D. Albornoz Vasquez, A. Belikov, A. Coc, J. Silk, E. Vangioni. Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem. Physical Review D, American Physical Society, 2012, 86, pp.063501. ⟨10.1103/PhysRevD.86.063501⟩. ⟨in2p3-00727273⟩

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