Inert Doublet Model and LEP II Limits

By E. Lundstrom, M. Gustafsson, J. Edsjo. 2008

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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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/219095edc060cd68d55dd25a17c2d081afc5d287

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Citations in the corpus

Scalar multiplet dark matter (2009, background): “[13,19–22,31–33] and confrontation of the IDM in the mH0 < mW regime to colliders data and future prospects was done in [34,35].”
Dark matter direct detection signals inferred from a cosmological N-body simulation with baryons (2009, background): “The accelerator constraints could be more stringent, but have to be analyzed within a particular model [139].”
ILC Higgs White Paper (2013, methodology): “[117], experimental bounds on the inert scalar masses are obtained by using the experimental results at the LEP collider [118, 119, 120].”
The inert doublet model of dark matter revisited (2010, background): “Some regions in the plane (mH0 ,mA0) are also constrained by LEP II data, see [12].”