Confined hidden vector dark matter

We argue that the lightest vector bound states of a confining hidden sector Communicating with the Standard Model through the Higgs portal are stable and are viable candidates of dark matter. The model is based on an SU(2) gauge group with a scalar Held in its fundamental representation and the stability of the lightest vector bound state results from the existence of a custodial symmetry. As the relic density depends essentially on the scale of confinement in the hidden sector, Lambda(HS), agreement with WMAP abundance requires Lambda(HS) in the 20-120 TeV range. (C) 2009 Elsevier B.V. All rights reserved.