- Main
Exotic Dark Matter Search with the Majorana Demonstrator
- Arnquist, IJ;
- Avignone, FT;
- Barabash, AS;
- Barton, CJ;
- Bhimani, KH;
- Blalock, E;
- Bos, B;
- Busch, M;
- Buuck, M;
- Caldwell, TS;
- Chan, Y-D;
- Christofferson, CD;
- Chu, P-H;
- Clark, ML;
- Cuesta, C;
- Detwiler, JA;
- Efremenko, Yu;
- Ejiri, H;
- Elliott, SR;
- Giovanetti, GK;
- Green, MP;
- Gruszko, J;
- Guinn, IS;
- Guiseppe, VE;
- Haufe, CR;
- Henning, R;
- Hervas Aguilar, D;
- Hoppe, EW;
- Hostiuc, A;
- Kidd, MF;
- Kim, I;
- Kouzes, RT;
- Lannen V, TE;
- Li, A;
- Lopez, AM;
- López-Castaño, JM;
- Martin, EL;
- Martin, RD;
- Massarczyk, R;
- Meijer, SJ;
- Mertens, S;
- Oli, TK;
- Othman, G;
- Paudel, LS;
- Pettus, W;
- Poon, AWP;
- Radford, DC;
- Rager, J;
- Reine, AL;
- Rielage, K;
- Ruof, NW;
- Schaper, DC;
- Tedeschi, D;
- Varner, RL;
- Vasilyev, S;
- Wilkerson, JF;
- Wiseman, C;
- Xu, W;
- Yu, C-H;
- Zhu, BX
- et al.
Abstract
With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the Majorana Demonstrator enable searches for several classes of exotic dark matter (DM) models. In this work, we report new experimental limits on keV-scale sterile neutrino DM via the transition magnetic moment from conversion to active neutrinos ν_{s}→ν_{a}. We report new limits on fermionic dark matter absorption (χ+A→ν+A) and sub-GeV DM-nucleus 3→2 scattering (χ+χ+A→ϕ+A), and new exclusion limits for bosonic dark matter (axionlike particles and dark photons). These searches utilize the (1-100)-keV low-energy region of a 37.5-kg y exposure collected by the Demonstrator between May 2016 and November 2019 using a set of ^{76}Ge-enriched detectors whose surface exposure time was carefully controlled, resulting in extremely low levels of cosmogenic activation.
Main Content
Enter the password to open this PDF file:
-
-
-
-
-
-
-
-
-
-
-
-
-
-