Directional detection of dark matter with two-dimensional targets

Physics Letters B

Yonit Hochberg¹  Mariangela Lisanti²  Christopher G. Tully²  Yonatan Kahn²  Kathryn M. Zurek³ 

[1] Department of Physics, LEPP, Cornell University, Ithaca, NY 14853, USA;Department of Physics, Princeton University, Princeton, NJ 08544, USA;Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA;

关键词: Dark matter;    Direct detection;    Directional detection;   

DOI  :  10.1016/j.physletb.2017.06.051

来源: DOAJ

【 摘 要 】

We propose two-dimensional materials as targets for direct detection of dark matter. Using graphene as an example, we focus on the case where dark matter scattering deposits sufficient energy on a valence-band electron to eject it from the target. We show that the sensitivity of graphene to dark matter of MeV to GeV mass can be comparable, for similar exposure and background levels, to that of semiconductor targets such as silicon and germanium. Moreover, a two-dimensional target is an excellent directional detector, as the ejected electron retains information about the angular dependence of the incident dark matter particle. This proposal can be implemented by the PTOLEMY experiment, presenting for the first time an opportunity for directional detection of sub-GeV dark matter.

【 授权许可】

Unknown