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

Keith A. Olive

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

Keith A. Olive

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Conference article › peer-review

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 language	English (US)
Pages (from-to)	197-206
Number of pages	10
Journal	Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
Volume	22
State	Published - 2012
Event	Lithium in the Cosmos - Paris, France Duration: Feb 27 2012 → Feb 29 2012

Bibliographical note

Publisher Copyright:
© SAIt 2012.

Keywords

Big bang nucleosynthesis
Fundamental constants
Supersymmetry

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title = "How to best reconcile big bang nucleosynthesis with Li abundance determinations?: Exotic BBN",

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.",

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T2 - Lithium in the Cosmos

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AB - 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.

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KW - Fundamental constants

KW - Supersymmetry

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Y2 - 27 February 2012 through 29 February 2012

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