%0 Journal Article
%T The cosmic 6Li and 7Li problems and BBN with long-lived charged massive particles
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Jedamzik, K.
%Z 15 pages (revtex), 14 figures, large changes in analysis and conclusions
%< avec comité de lecture
%Z PTA/07-51
%@ 1550-7998
%J Physical Review D
%I American Physical Society
%V 77
%P 063524
%8 2008
%D 2008
%Z 0707.2070
%Z 2007arXiv0707.2070J
%R 10.1103/PhysRevD.77.063524
%K Origin
%K formation
%K and abundances of the elements in the Universe
%K Big Bang nucleosynthesis
%Z 98.80.Ft, 26.35.+c
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X Charged massive particles (CHAMPs), when present during the Big Bang nucleosynthesis (BBN) era, may significantly alter the synthesis of light elements when compared to a standard BBN scenario. This is due to the formation of bound states with nuclei. This paper presents a detailed numerical and analytical analysis of such CHAMP BBN. All reactions important for predicting light-element yields are calculated within the Born approximation. Three priorly neglected effects are treated in detail:(a) photodestruction of bound states due to electromagnetic cascades induced by the CHAMP decay, (b) late-time efficient destruction/production of H2, Li6, and Li7 due to reactions on charge Z=1 nuclei bound to CHAMPs, and (c) CHAMP exchange between nuclei. Each of these effects may induce orders-of-magnitude changes in the final abundance yields. The study focusses on the impact of CHAMPs on a possible simultaneous solution of the Li6 and Li7 problems. It is shown that a priorly suggested simultaneous solution of the Li6 and Li7 problems for a relic decaying at tau_x = 1000 sec is only very weakly dependent on the relic being neutral or charged, unless its hadronic branching ratio is Bh << 10^-4 very small. By use of a Monte-Carlo analysis it is shown that within CHAMP BBN the existence of further parameter space for a simultaneous solution of the Li6 and Li7 problem for long decay times tau_x > 10^6 sec seems possible but fairly unlikely.
%G English
%L in2p3-00182623
%U https://hal.in2p3.fr/in2p3-00182623
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2