Akimov, DY and Araujo, HM and Barnes, EJ and Belov, VA and Bewick, A and Burenkov, AA and Cashmore, R and Chepel, V and Currie, A and Davidge, D and Dawson, J and Durkin, T and Edwards, B and Ghag, C and Hollingsworth, A and Horn, M and Howard, AS and Hughes, AJ and Jones, WG and Kalmus, GE and Kobyakin, AS and Kovalenko, AG and Lebedenko, VN and Lindote, A and Liubarsky, I and Lopes, MI and Luscher, R and Lyons, K and Majewski, P and Murphy, AS and Neves, F and Paling, SM and Cunha, JPD and Preece, R and Quenby, JJ and Reichhart, L and Scovell, PR and Silva, C and Solovov, VN and Smith, NJT and Smith, PF and Stekhanov, VN and Sumner, TJ and Thorne, C and Viveiros, LD and Walker, RJ (2010) Limits on inelastic dark matter from ZEPLIN-III.
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Abstract
We present limits on the WIMP-nucleon cross section for inelastic dark matter derived from the 2008 run of ZEPLIN-III. Cuts, notably on scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure of 63 kg.days 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 1.17 ton.year DAMA modulation signal is allowed at 90% CL: it is in the mass range 45-60 GeV with a minimum CL of 88%, again derived from the maximum patch. This is the tightest constraint on that explanation of the DAMA result yet presented using a xenon target.
| Type: | Article |
|---|---|
| Title: | Limits on inelastic dark matter from ZEPLIN-III |
| Additional information: | 4 pages, 5 figures. Updated with 1.17 ton.year DAMA results. |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy |
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