http://arxiv.org/abs/1809.06809
Light dark matter in the context of dark sector theories is an attractive candidate for the dark matter thought to make up the bulk of the mass of our universe. We explore here the possibility of using a low-pressure, negative-ion, time projection chamber detector to search for light dark matter behind the beam dump of an electron accelerator. The sensitivity of a 10m long detector is several orders of magnitude better than existing limits. This sensitivity includes large regions of parameter space where light dark matter is predicted to be the relic density. Backgrounds at shallow depth will need to be considered carefully. However, several signatures exist, including a powerful directional signature, which will allow a detection even in the presence of backgrounds.
D. Snowden-Ifft and J. Harton
Wed, 19 Sep 18
5/59
Comments: 8 pages, 7 figures
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