Limits on the spin-dependent WIMP-nucleon cross-sections from the first science run of the ZEPLIN-III experiment
- Lebedenko, V. N.
- Araujo, H. M.
- Barnes, E. J.
- Bewick, A.
- Cashmore, R.
- Chepel, V.
- Davidge, D.
- Dawson, J.V.
- Durkin, T.
- Edwards, B.
- Ghag, C.
- Graffagnino, V.
- Horn, M.
- Howard, A. S.
- Hughes, A. J.
- Jones, W. G.
- Joshi, M.
- Kalmus, G. E.
- Kovalenko, A. G.
- Lindote, A.
- Liubarsky, I.
- Lopes, M. I.
- Luscher, R.
- Lyons, K.
- Majewski, P.
- Murphy, A. Stj.
- Neves, F.
- Da Cunha, J. Pinto
- Preece, R.
- Quenby, J. J.
- Scovell, P. R.
- Silva, C.
- Solovov, V. N.
- Smith, N. J. T.
- Smith, P. F.
- Stekhanov, V. N.
- Sumner, T. J.
- Thorne, C.
- Walker, R. J.
DOIAbstract
4 pages, 2 figuresWe present new experimental constraints on the WIMP-nucleon spin-dependent elastic cross-sections using data from the first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter WIMPs based at the Boulby mine. Analysis of $\sim$450 kg$\cdot$days fiducial exposure revealed a most likely signal of zero events, leading to a 90%-confidence upper limit on the pure WIMP-neutron cross-section of $\sigma_n=1.8\times 10^{-2}$ pb at 55 GeV/$c^2$ WIMP mass. Recent calculations of the nuclear spin structure based on the Bonn CD nucleon-nucleon potential were used for the odd-neutron isotopes $^{129}$Xe and $^{131}$Xe. These indicate that the sensitivity of xenon targets to the spin-dependent WIMP-p...
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