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Title: Inert doublet model and LEP II limits

The inert doublet model is a minimal extension of the standard model introducing an additional SU(2) doublet with new scalar particles that could be produced at accelerators. While there exists no LEP II analysis dedicated for these inert scalars, the absence of a signal within searches for supersymmetric neutralinos can be used to constrain the inert doublet model. This translation however requires some care because of the different properties of the inert scalars and the neutralinos. We investigate what restrictions an existing DELPHI Collaboration study of neutralino pair production can put on the inert scalars and discuss the result in connection with dark matter. We find that although an important part of the inert doublet model parameter space can be excluded by the LEP II data, the lightest inert particle still constitutes a valid dark matter candidate.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Physics, Stockholm University, AlbaNova University Center, SE - 106 91 Stockholm (Sweden)
  2. (Italy) and Department of Physics, Stockholm University, AlbaNova University Center, SE - 106 91 Stockholm (Sweden)
  3. (Sweden)
Publication Date:
OSTI Identifier:
21259940
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 79; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.79.035013; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; LEP STORAGE RINGS; NONLUMINOUS MATTER; PAIR PRODUCTION; PARTICLES; STANDARD MODEL; SU-2 GROUPS; SUPERSYMMETRY