학술논문
Limits on inelastic dark matter from ZEPLIN-III
Document Type
Working Paper
Author
Akimov, D. Yu.; Araujo, 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.; Luscher, R.; Lyons, K.; Majewski, P.; Murphy, A. StJ.; Neves, F.; Paling, S. M.; da Cunha, J. Pinto; 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.
Source
Phys.Lett.B692:180-183,2010
Subject
Language
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.
Comment: 4 pages, 5 figures. Updated with 1.17 ton.year DAMA results.
Comment: 4 pages, 5 figures. Updated with 1.17 ton.year DAMA results.