Two-singlet model for light cold dark matter

Abdessamad Abada, Djamal Ghaffor, Salah Nasri

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

We extend the standard model by adding two gauge-singlet Z 2-symmetric scalar fields that interact with visible matter only through the Higgs particle. One is a stable dark matter WIMP, and the other one undergoes a spontaneous breaking of the symmetry that opens new channels for the dark matter annihilation, hence lowering the mass of the WIMP. We study the effects of the observed dark matter relic abundance on the WIMP annihilation cross section and find that in most regions of the parameters' space, light dark matter is viable. We also compare the elastic-scattering cross section of our dark matter candidate off a nucleus with existing (CDMSII and XENON100) and projected (SuperCDMS and XENON1T) experimental exclusion bounds. We find that most of the allowed mass range for light dark matter will be probed by the projected sensitivity of the XENON1T experiment.

Original languageEnglish
Article number095021
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number9
DOIs
Publication statusPublished - May 26 2011
Externally publishedYes

ASJC Scopus subject areas

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

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