Limits on inelastic dark matter from ZEPLIN-III
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.
Cite
@article{arxiv.1003.5626,
title = {Limits on inelastic dark matter from ZEPLIN-III},
author = {D. Yu. Akimov and H. M. Araujo and E. J. Barnes and V. A. Belov and A. Bewick and A. A. Burenkov and R. Cashmore and V. Chepel and A. Currie and D. Davidge and J. Dawson and T. Durkin and B. Edwards and C. Ghag and A. Hollingsworth and M. Horn and A. S. Howard and A. J. Hughes and W. G. Jones and G. E. Kalmus and A. S. Kobyakin and A. G. Kovalenko and V. N. Lebedenko and A. Lindote and I. Liubarsky and M. I. Lopes and R. Luscher and K. Lyons and P. Majewski and A. StJ. Murphy and F. Neves and S. M. Paling and J. Pinto da Cunha and R. Preece and J. J. Quenby and L. Reichhart and P. R. Scovell and C. Silva and V. N. Solovov and N. J. T. Smith and P. F. Smith and V. N. Stekhanov and T. J. Sumner and C. Thorne and L. de Viveiros and R. J. Walker},
journal= {arXiv preprint arXiv:1003.5626},
year = {2015}
}
Comments
4 pages, 5 figures. Updated with 1.17 ton.year DAMA results.