Limits on inelastic dark matter from ZEPLIN-III
- Akimov, D.Yu.
- Araújo, H.M.
- Barnes, E.J.
- Belov, V.A.
- Bewick, A.
- Burenkov, A.A.
- Cashmore, R.
- Chepel, V.
- Currie, A.
- Davidge, D.
- Dawson, J.
- Durkin, T.
- Edwards, B.
- Ghag, C.
- Hollingsworth, A.
- Horn, M.
- Howard, A.S.
- Hughes, A.J.
- Jones, W.G.
- Kalmus, G.E.
- Kobyakin, A.S.
- Kovalenko, A.G.
- Lebedenko, V.N.
- Lindote, A.
- Liubarsky, I.
- Lopes, M.I.
- Lüscher, R.
- Lyons, K.
- Majewski, P.
- Murphy, A.StJ.
- Neves, F.
- Paling, S.M.
- Pinto da Cunha, J.
- Preece, R.
- Quenby, J.J.
- Reichhart, L.
- Scovell, P.R.
- Silva, C.
- Solovov, V.N.
- Smith, N.J.T.
- Smith, P.F.
- Stekhanov, V.N.
- Sumner, T.J.
- Thorne, C.
- de Viveiros, L.
- Walker, R.J.
DOIAbstract
AbstractWe present limits on the WIMP–nucleon cross section for inelastic dark matter from a reanalysis of the 2008 run of ZEPLIN-III. Cuts, notably on scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure of 63kgday in the range 20–80keV nuclear recoil energy, in which 6 events are observed. Upper limits on signal rate are derived from the maximum empty patch in the data. Under standard halo assumptions a small region of parameter space consistent, at 99% CL, with causing the 1.17tonyr DAMA modulation signal is allowed at 90% CL: it is in the mass range 45–60GeVc−2 with a minimum CL of 87%, again derived from the maximum patch. This is the tightest constraint yet presented using xenon, a target nucleus whose ...
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