Relic abundance of neutralinos in heterotic string theory: Weak versus strong coupling

Y. Kawamura, H. P. Nilles, M. Olechowski, M. Yamaguchi

Research output: Contribution to journalArticlepeer-review

Abstract

The relic abundance of stable neutralinos is investigated in E8 × E′8 heterotic string theory when supersymnietry is spontaneously broken by hidden-sector gaugino condensates. In the weak coupling regime, very large scalar masses (compared to gaugino masses) are shown to lead to a too large relic abundance of the neutralinos, incompatible with cosmological observations in most of parameter space. The problem does not arise in the strong coupling regime (heterotic M-theory) because there scalar and gaugino masses are generically of the same order of magnitude.

Original languageEnglish
Pages (from-to)XVIII-18
JournalJournal of High Energy Physics
Volume2
Issue number6
Publication statusPublished - 1998 Dec 1
Externally publishedYes

Keywords

  • Dark matter
  • M-theory
  • Superstrings and heterotic strings

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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