Improved Exclusion Limits from the EDELWEISS WIMP Search
Abstract
The EDELWEISS experiment has improved its sensitivity for the direct search for WIMP dark matter. In the recoil energy range relevant for WIMP masses below 10 TeV/c2, no nuclear recoils were observed in the fiducial volume of a heat-and-ionization cryogenic Ge detector operated in the low-background environment of the Laboratoire Souterrain de Modane in the Frejus Tunnel, during an effective exposure of 7.4 kg.days. This result is combined with the previous EDELWEISS data to derive a limit on the cross-section for spin-independent interaction of WIMPs and nucleons as a function of WIMP mass, using standard nuclear physics and astrophysical assumptions. This limit excludes at more than 99.8%CL a WIMP candidate with a mass of 44 GeV/c2 and a cross-section of 5.4 x 10-6 pb, as reported by the DAMA collaboration. A first sample of supersymmetric models are also excluded at 90%CL.
Cite
@article{arxiv.astro-ph/0206271,
title = {Improved Exclusion Limits from the EDELWEISS WIMP Search},
author = {A. Benoit and L. Berge and A. Broniatowski and L. Chabert and B. Chambon and M. Chapellier and G. Chardin and P. Charvin and M. De Jesus and P. Di Stefano and D. Drain and L. Dumoulin and J. Gascon and G. Gerbier and E. Gerlic and C. Goldbach and M. Goyot and M. Gros and J. P. Hadjout and S. Herve and A. Juillard and A. de Lesquen and M. Loidl and J. Mallet and S. Marnieros and O. Martineau and N. Mirabolfathi and L. Mosca and X. -F. Navick and G. Nollez and P. Pari and C. Riccio and V. Sanglard and M. Stern and L. Vagneron},
journal= {arXiv preprint arXiv:astro-ph/0206271},
year = {2008}
}
Comments
14 pages, Latex, 5 figures. Submitted to Phys. Lett. B