##### $Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?
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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###### Tweets
higgsinocat: $Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?. (arXiv:1907.05893v2 [hep-ph] UPDATED) relevance:100% https://t.co/BbRtUzAT54 #darkmatter @CBlanco2718 @DanHooperAstro https://t.co/dloxZhsKN8
arxiv_org: $Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?. https://t.co/ENfGChhkOs https://t.co/L5dF8CCBJs
CBlanco2718: In our new paper with Dan Hooper @DanHooperAstro , Miguel Escudero, and Sam Witte, we take a deep look at the explored and explorable parameter space of Z'-mediated WIMPs. Are they dead? find out! https://t.co/qEcNvtpxqG
scimichael: Z′ Mediated WIMPs: Dead, Dying, or Soon to be Detected? https://t.co/1ThdzmJVqn
HEPExperPapers: $Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?. https://t.co/WJTNelUrZJ
higgsinocat: $Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?. (arXiv:1907.05893v1 [hep-ph]) relevance:100% https://t.co/BbRtUzAT54 #darkmatter @CBlanco2718 @DanHooperAstro https://t.co/ewN35ZBtFL