Hidden Fermion in Stueckelberg Z' Models as Milli-charged Dark Matter

Details Hidden Fermion in Stueckelberg Z' Models as Milli-charged Dark Matter Hidden Fermion in Stueckelberg Z' Models as Milli-charged Dark Matter

2007-10-10

arxiv.org/abs/0710.2005v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Submitted for the SUSY07 proceedings, 4 pages, LaTeX, 7 eps figures. More references added

Scientific paper

The hidden Stueckelberg Z' model is augmented by a pair of Dirac fermions. If the Z' has a coupling strength comparable to weak scale coupling, one can show that this hidden fermion-antifermion pair could be a milli-charged dark matter candidate with a viable relic density. Monochromatic photon flux coming from the Galactic center due to pair annihilation of these milli-charged particles is calculated and is shown to be within reach of the next generation gamma-ray experiments. Characteristic collider signature of this theoretical endeavor is that the Stueckelberg Z' boson has a large invisible width decaying into the hidden fermion-antifermion pair if kinematically allowed. Singly production of this Z' boson at the LHC and ILC are studied.

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