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Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem
Albornoz Vasquez D., Belikov A., Coc A., Silk J., Vangioni E.
Physical Review D 86 (2012) 063501 - http://hal.in2p3.fr/in2p3-00727273
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem
D. Albornoz Vasquez1, A. Belikov1, A. Coc2, J. Silk1, E. Vangioni1
1 :  IAP - Institut d'Astrophysique de Paris
CNRS : UMR7095 – INSU – Université Pierre et Marie Curie (UPMC) - Paris VI
98bis, bd Arago - 75014 Paris France
2 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
CNRS : UMR8609 – IN2P3 – Université Paris XI - Paris Sud
batiments 104 et 108 - 91405 Orsay Campus
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.

Articles dans des revues avec comité de lecture
Physical Review D (Phys. Rev. D)
Publisher American Physical Society
ISSN 1550-7998 (eISSN : 1550-2368)

PACS numbers: 26.35.+c, 95.35.+d
6 pages, 4 figures. Accepted for publication in Phys.Rev.D
Astrophysics - Cosmology and Extragalactic Astrophysics – Nuclear Theory
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