How to best reconcile big bang nucleosynthesis with Li abundance determinations? Exotic BBN

Research output: Contribution to journalConference article

4 Scopus citations

Abstract

Non-standard model solutions to the 7Li problem are discussed. Particular attention is given to the possibility of a relatively long lived gravitino decay affecting the light element abundances. Gravitinos with masses between 4-5 TeV could significantly reduce the final 7Li abundance. Alternatively, a possible variation in the fundamental constants may also affect the 7Li abundance. In both cases, reduced 7Li is accompanied by an increased D/H abundance. This may have implications for the chemical evolution in quasar absorption systems.

Original languageEnglish (US)
Pages (from-to)197-206
Number of pages10
JournalMemorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
Volume22
StatePublished - Jan 1 2012
EventLithium in the Cosmos - Paris, France
Duration: Feb 27 2012Feb 29 2012

Keywords

  • Big bang nucleosynthesis
  • Fundamental constants
  • Supersymmetry

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