Direct Detection of Dark Matter Degenerate with Colored Particles in Mass
arXiv:1110.3719 · doi:10.1016/j.physletb.2011.11.017
Abstract
In this Letter we explore the direct detection of the dark matter in the universe, assuming the dark matter particles are degenerate in mass with new colored particles below TeV scale. The scenario with such a mass spectrum is difficult to be confirmed or excluded by the present analysis at the LHC experiments because the QCD jets in the cascade decay of the new particles produced in the proton-proton collision are too soft to be triggered in the event selection. It is shown that both of the spin-independent and spin-dependent couplings of the dark matter with a nucleon are enhanced and the scattering cross section may reach even the current bound of the direct detection experiments. Then such a degenerate scenario may be tested in the direct detection experiments.
11 pages, 4 figures. Version accepted for publication in Phys. Lett. B
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