Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Motoi Endo, Fuminobu Takahashi

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We examine nonthermal dark matter production from a late-decaying scalar field, with a particular attention on nonrenormalizable operators of D=5 through which the scalar field decays into the standard model particles and their superpartners. We show that almost the same number of superparticles as that of particles are generally produced from the decay. To avoid the gravitino overproduction problem, the decay is favored to proceed via interactions with an intermediate cutoff scale MMP. This should be contrasted to the conventional scenario using the modulus decay. The saxion, a scalar partner of the axion, is proposed as a natural candidate for such late-decaying scalar fields. We find that a right amount of the W-ino/Higgsino dark matter with a mass of O(100)GeV is obtained for the saxion mass around the weak scale and axion decay constant, FA=O(109-12)GeV.

Original languageEnglish
Article number063502
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number6
DOIs
Publication statusPublished - 2006 Sep 11
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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