期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2019/11/024
关键词
dark matter theory; dark matter detectors; dark matter experiments
资金
- U.S. National Science Foundation [DGE-1144082, DGE-1746045]
- European Research Council under the European Union's Horizon 2020 program (ERC) [648680 DARKHORIZONS]
- U.S. Department of Energy, Office of High Energy Physics [DE-AC02-07CH11359]
- Spanish grant of the MINECO [FPA2017-85985-P]
- European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant [690575, 674896]
Although weakly interacting massive particles (WIMPs) have long been among the most studied and theoretically attractive classes of candidates for the dark matter of our universe, the lack of their detection in direct detection and collider experiments has begun to dampen enthusiasm for this paradigm. In this study, we set out to appraise the status of the WIMP paradigm, focusing on the case of dark matter candidates that interact with the Standard Model through a new gauge boson. After considering a wide range of Z' mediated dark matter models, we quantitatively evaluate the fraction of the parameter space that has been excluded by existing experiments, and that is projected to fall within the reach of future direct detection experiments. Despite the existence of stringent constraints, we find that a sizable fraction of this parameter space remains viable. More specifically, if the dark matter is a Majorana fermion, we find that an order one fraction of the parameter space is in many cases untested by current experiments. Future direct detection experiments with sensitivity near the irreducible neutrino floor will be able to test a significant fraction of the currently viable parameter space, providing considerable motivation for the next generation of direct detection experiments.
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