First search for a dark matter annual modulation signal with NaI(Tl) in the Southern Hemisphere by DM-Ice17
- Souza, E.B.D.
- Cherwinka, J.
- Cole, A.
- Ezeribe, A.C.
- Grant, D.
- Halzen, F.
- Heeger, K.M.
- Hsu, L.
- Hubbard, A.J.F.
- Jo, J.H.
- Karle, A.
- Kauer, M.
- Kudryavtsev, V.A.
- Lim, K.E.
- Macdonald, C.
- Maruyama, R.H.
- Mouton, F.
- Paling, S.M.
- Pettus, W.
- Pierpoint, Z.P.
- Reilly, B.N.
- Robinson, M.
- Rogers, F.R.
- Sandstrom, P.
- Scarff, A.
- Spooner, N.J.C.
- Telfer, S.
- Yang, L.
- Collaboration, D-I.
DOIAbstract
We present the first search for a dark matter annual modulation signal in the Southern Hemisphere conducted with NaI(Tl) detectors, performed by the DM-Ice17 experiment. Nuclear recoils from dark matter interactions are expected to yield an annually modulated signal independent of location within the Earth’s hemispheres. DM-Ice17, the first step in the DM-Ice experimental program, consists of 17 kg of NaI(Tl) located at the South Pole under 2200 m.w.e. overburden of Antarctic glacial ice. Taken over 3.6 years for a total exposure of 60.8 kg yr, DM-Ice17 data are consistent with no modulation in the energy range of 4–20 keV, providing the strongest limits on weakly interacting massive particle dark matter from a direct detection experiment l...
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