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Title: Two-singlet model for light cold dark matter

We extend the standard model by adding two gauge-singlet Z{sub 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.
Authors:
 [1] ;  [2] ;  [3]
  1. Laboratoire de Physique des Particules et Physique Statistique, Ecole Normale Superieure, BP 92 Vieux Kouba, 16050 Alger (Algeria)
  2. Laboratoire de Physique Theorique d'Oran, Es-Senia University, 31000 Oran (Algeria)
  3. Physics Department, UAE University, POB 17551, Al Ain (United Arab Emirates)
Publication Date:
OSTI Identifier:
21541649
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 83; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.83.095021; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; COMPARATIVE EVALUATIONS; CROSS SECTIONS; ELASTIC SCATTERING; GAUGE INVARIANCE; HIGGS BOSONS; MASS; NONLUMINOUS MATTER; NUCLEI; SCALAR FIELDS; SENSITIVITY; STANDARD MODEL; SYMMETRY; SYMMETRY BREAKING; WEAK INTERACTIONS BASIC INTERACTIONS; BOSONS; ELEMENTARY PARTICLES; EVALUATION; FIELD THEORIES; GRAND UNIFIED THEORY; INTERACTIONS; INVARIANCE PRINCIPLES; MATHEMATICAL MODELS; MATTER; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SCATTERING; UNIFIED GAUGE MODELS