New constraints on "INO" masses from cosmology (I). Supersymmetric "inos"

Lawrence Krauss

Research output: Contribution to journalArticle

203 Citations (Scopus)

Abstract

In this first paper we derive new constraints on gravitino and photino masses in big bang cosmology. First, in the context of induced supersymmetry breaking we calculate explicitly the gravitino decay rate into gauginos, and find that in the absence of significant dilution the gravitino mass must be ≥5 × 104 GeV in order not to affect nucleosynthesis. We also find in this case that constraints in the lightest R-odd particle, the photino, differ significantly from earlier bounds based on analogy with stable heavy neutrino bounds in the standard model, due to out of equilibrium gravitino decay. In order to avoid both these constraints the gravitino distribution must be severely suppressed. If this is due to inflation, it must occur at a scale ≲1010-1011 GeV.

Original languageEnglish (US)
Pages (from-to)556-569
Number of pages14
JournalNuclear Physics, Section B
Volume227
Issue number3
DOIs
StatePublished - Nov 7 1983
Externally publishedYes

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gravitinos
cosmology
big bang cosmology
nuclear fusion
decay rates
supersymmetry
dilution
neutrinos
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

New constraints on "INO" masses from cosmology (I). Supersymmetric "inos". / Krauss, Lawrence.

In: Nuclear Physics, Section B, Vol. 227, No. 3, 07.11.1983, p. 556-569.

Research output: Contribution to journalArticle

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