



@article {2375,
	title = {Gravitational Direct Detection of Dark Matter},
	journal = {Phys. Rev. D},
	volume = {102},
	year = {2020},
	month = {10/13/2020},
	type = {FERMILAB-PUB-19-082-AE-T},
	abstract = {<p>The only coupling dark matter is guaranteed to have with the standard model is through gravity. Here we propose a concept for direct dark matter detection using only this gravitational coupling, enabling a new regime of detection. Leveraging dramatic advances in the ability to create, maintain, and probe quantum states of massive objects, we suggest that an array of quantum-limited impulse sensors may be capable of detecting the correlated gravitational force created by a passing dark matter particle. We present two concrete realizations of this scheme, using either mechanical resonators or freely-falling masses. With currently available technology, a meter-scale apparatus of this type could detect any dark matter candidate around the Planck mass or heavier.</p>},
	doi = {https://doi.org/10.1103/PhysRevD.102.072003},
	url = {https://arxiv.org/abs/1903.00492},
	author = {Daniel Carney and Sohitri Ghosh and Gordan Krnjaic and J. M. Taylor}
}
@article {2693,
	title = {Search for composite dark matter with optically levitated sensors},
	journal = {Phys. Rev. Lett. },
	volume = {125},
	year = {2020},
	month = {11/2/2020},
	abstract = {<p>Results are reported from a search for a class of composite dark matter models with feeble, long-range interactions with normal matter. We search for impulses arising from passing dark matter particles by monitoring the mechanical motion of an optically levitated nanogram mass over the course of several days. Assuming such particles constitute the dominant component of dark matter, this search places upper limits on their interaction with neutrons of αn\&le;1.2\&times;10\&minus;7 at 95\% confidence for dark matter masses between 1--10 TeV and mediator masses mφ\&le;0.1 eV. Due to the large enhancement of the cross-section for dark matter to coherently scatter from a nanogram mass (\&sim;1029 times that for a single neutron) and the ability to detect momentum transfers as small as \&sim;200 MeV/c, these results provide sensitivity to certain classes of composite dark matter models that substantially exceeds existing searches, including those employing kg-scale or ton-scale targets. Extensions of these techniques can enable directionally-sensitive searches for a broad class of previously inaccessible heavy dark matter candidates.\&nbsp;</p>},
	doi = {https://doi.org/10.1103/PhysRevLett.125.181102},
	url = {https://arxiv.org/abs/2007.12067},
	author = {Fernando Monteiro and Gadi Afek and Daniel Carney and Gordan Krnjaic and Jiaxiang Wang and David C. Moore}
}
