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arXiv:astro-ph/0512120 (astro-ph)
[Submitted on 5 Dec 2005 (v1), last revised 19 Apr 2006 (this version, v2)]

Title:Critical revision of the ZEPLIN-I sensitivity to WIMP interactions

Authors:A. Benoit, M. Chapellier, G. Chardin, L. Dumoulin, K. Eitel, J. Gascon, G. Gerbier, C. Goldbach, J. Jochum, A. de Lesquen, G. Nollez, F. Proebst, W. Seidel
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Abstract: The ZEPLIN collaboration has recently published its first result presenting a maximum sensitivity of $1.1 \times 10^{-6}$ picobarn for a WIMP mass of $\approx$ 60 GeV. The analysis is based on a discrimination method using the different time distribution of scintillation light generated in electron recoil and nuclear recoil interactions. We show that the methodology followed both for the calibration of the ZEPLIN-I detector response and for the estimation of the discrimination power is not reliable enough to claim any background discrimination at the present stage. The ZEPLIN-I sensitivity appears then to be in the order of 10$^{-3}$ picobarn, three orders of magnitude above the claimed 1.1 10$^{-6}$ picobarn.
Comments: 8 pages, 4 figures, minor corrections, two references updated, final version accepted in Physics Letters B
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0512120
  (or arXiv:astro-ph/0512120v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0512120
Journal reference: Phys.Lett.B637:156-160,2006
Related DOI: https://doi.org/10.1016/j.physletb.2006.04.030

Submission history

From: Gabriel Chardin [view email]
[v1] Mon, 5 Dec 2005 18:40:27 UTC (256 KB)
[v2] Wed, 19 Apr 2006 13:34:21 UTC (256 KB)
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