Kavli Affiliate: Peter W. Graham
| First 5 Authors: Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong, ,
| Summary:
While much supersymmetric weakly interacting massive particle (WIMP)
parameter space has been ruled out, one remaining important candidate is
Higgsino dark matter. The Higgsino can naturally realize the "inelastic dark
matter" scenario, where the scattering off a nucleus occurs between two
nearly-degenerate states, making it invisible to WIMP direct detection
experiments if the splitting is too large to be excited. It was realized that a
"luminous dark matter" detection process, where the Higgsino upscatters in the
Earth and subsequently decays into a photon in a large neutrino detector,
offers the best sensitivity to such a scenario. We consider the possibility of
adding a large volume of a heavy element, such as Pb or U, around the detector.
We also consider the presence of U and Th in the Earth itself, and the effect
of an enhanced high-velocity tail of the dark matter distribution due to the
presence of the Large Magellanic Cloud. These effects can significantly improve
the sensitivity of detectors such as JUNO, SNO+, KamLAND, and Borexino,
potentially making it possible in the future to cover much of the remaining
parameter space for this classic supersymmetric WIMP dark matter.
| Search Query: ArXiv Query: search_query=au:”Peter W. Graham”&id_list=&start=0&max_results=3