Limits on inelastic dark matter from ZEPLIN-III

• DOI: 10.1016/j.physletb.2010.07.042
• Publication Date: 2010-07-30T08:29:57Z
• Authors: D.Yu. Akimov; H.M. Araújo; E.J. Barnes; V.A. Belov; A. Bewick; A.A. Burenkov; R. Cashmore; V. Chepel; A. Currie; D. Davidge; J. Dawson; T. Durkin; B. Edwards; C. Ghag; A. Hollingsworth; M. Horn; A.S. Howard; A.J. Hughes; W.G. Jones; G.E. Kalmus; A.S. Kobyakin; A.G. Kovalenko; V.N. Lebedenko; A. Lindote; I. Liubarsky; M.I. Lopes; R. Lüscher; K. Lyons; P. Majewski; A.StJ. Murphy; F. Neves; S.M. Paling; J. Pinto da Cunha; R. Preece; J.J. Quenby; L. Reichhart; P.R. Scovell; C. Silva; V.N. Solovov; N.J.T. Smith; P.F. Smith; V.N. Stekhanov; T.J. Sumner; C. Thorne; L. de Viveiros; R.J. Walker
• Keywords: WIMP; Recoil

We present limits on the WIMP-nucleon cross section for inelastic dark matter derived from 2008 run of ZEPLIN-III. Cuts, notably scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure 63 kg.days in range 20-80keV nuclear recoil energy, which 6 events are observed. Upper signal rate maximum empty patch data. Under standard halo assumptions small region parameter space consistent, at 99% CL, with causing 1.17 ton.year DAMA modulation is allowed 90% CL: it mass 45-60 GeV minimum CL 88%, again patch. This tightest constraint that explanation result yet presented using xenon target.