%0 Journal Article
%T Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Jedamzik, K.
%Z 24 pages (revtex), 11 figures, title changed, matches published version
%< avec comité de lecture
%Z PTA/06-34
%@ 1550-7998
%J Physical Review D
%I American Physical Society
%V 74
%P 103509
%8 2006
%D 2006
%Z hep-ph/0604251
%R 10.1103/PhysRevD.74.103509
%Z 98.80.Cq, 95.35.+d, 98.70.Vc
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Journal articles
%X Big Bang nucleosynthesis in the presence of decaying relic neutral particles is examined in detail. All non-thermal processes important for the determination of light-element abundance yields of 2H, 3H, 3He, 4He, 6Li, and 7Li are coupled to the thermonuclear fusion reactions to obtain comparatively accurate results. Predicted light-element yields are compared to observationally inferred limits on primordial light-element abundances to infer constraints on the abundances and properties of relic decaying particles with decay times in the interval 0.01 sec < tau < 10^(12) sec. Decaying particles are typically constrained at early times by 4He or 2H, at intermediate times by 6Li, and at large times by the 3He/2H ratio. Constraints are shown for a large number of hadronic branching ratios and decaying particle masses and may be applied to constrain the evolution of the early Universe.
%G English
%L in2p3-00115592
%U https://hal.in2p3.fr/in2p3-00115592
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2