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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.
Physics letters. B, 08/2010, Letnik: 692, Številka: 3Journal Article
We 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 similarity to iodine mitigiates systematic error from the assumed halo.
