Next-to-minimal dark matter at the LHC

Understand

We examine the collider signatures of a WIMP dark matter scenario comprising a singlet fermion and an SU(2) n-plet fermion, with a focus on n=3 and n=5.

• The singlet and n-plet masses are of the order of the electroweak scale.
• The n-plet contains new charged particles which will be copiously pair-produced at the LHC.
• Small mixing angles and near-degenerate masses, both of which feature naturally in these models, give rise to long-lived particles and their characteristic collider signatures.