Directly detecting isospin-violating dark matter
We consider the prospects for multiple dark matter direct detection experiments to determine if the interactions of a dark matter candidate are isospin-violating. We focus on theoretically well-motivated examples of isospin-violating dark matter (IVDM), including models in which dark matter interactions with nuclei are mediated by a dark photon, a Z, or a squark. We determine that the best prospects for distinguishing IVDM from the isospin-invariant scenario arise in the cases of dark photon-or Z-mediated interactions, and that the ideal experimental scenario would consist of large exposure xenon- and neon-based detectors. If such models just evade current direct detection limits, then one could distinguish such models from the standard isospin-invariant case with two detectors with of order 100 ton-year exposure.
Physical Review D
Digital Object Identifier (DOI)
Kelso, Kumar, J., Marfatia, D., & Sandick, P. (2018). Directly detecting isospin-violating dark matter. Phys. Rev. D, 97(5). https://doi.org/10.1103/PhysRevD.97.056004