Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem

D. Albornoz Vasquez; A. Belikov; A. Coc; J. Silk; E. Vangioni

HAL: in2p3-00727273, version 1

arXiv: 1208.0443

ADS Bibliographic id: 2012arXiv1208.0443A

DOI: 10.1103/PhysRevD.86.063501

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Physical Review D 86 (2012) 063501

Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem

D. Albornoz Vasquez¹, A. Belikov¹, A. Coc², J. Silk¹, E. Vangioni¹

(2012-08)

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.

1:	IAP - Institut d'Astrophysique de Paris

2:	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

Research team: CSNSM AN

Subject(s)

Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics

Sciences of the Universe/Astrophysics/Cosmology and Extra-Galactic Astrophysics

Keyword(s) : Astrophysics - Cosmology and Extragalactic Astrophysics – Nuclear Theory

Fulltext link:

http://fr.arXiv.org/abs/1208.0443


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Submitted on: Monday, 3 September 2012 11:59:33
Updated on: Thursday, 6 September 2012 16:01:01