L. Chabert

Publications (8)0.57 Total impact

• Source

  Available from: arxiv.org

  Article: Final results of the EDELWEISS-I dark matter search with cryogenic heat-and-ionization Ge detectors

  V. Sanglard, A. Benoit, L. Bergé, J. Blümer, A. Broniatowski, B. Censier, L. Chabert, M. Chapellier, G. Chardin, P. Charvin, [......], J. Mallet, S. Marnieros, L. Mosca, X.-F. Navick, G. Nollez, P. Pari, L. Schoeffel, M. Stern, L. Vagneron, V. Villar
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  ABSTRACT: The final results of the EDELWEISS-I dark matter search using cryogenic heat-and-ionization Ge detectors are presented. The final data sample corresponds to an increase by a factor 5 in exposure relative to the previously published results. A recoil energy threshold of 13 keV or better was achieved with three 320 g detectors working simultaneously over four months of stable operation. Limits on the spin-independent cross section for the scattering of a weakly interacting massive particle on a nucleon are derived from an accumulated fiducial exposure of 62 kg d.
  Phys. Rev. D. 06/2005; 71(12).
• Article: Looking for SUSY with EDELWEISS-I and-II

  G. Gerbier, A. Benoît, L. Bergé, A. Broniatowski, L. Chabert, B. Chambon, B. Chardin, M. Chapellier, P. Charvin, M. De Jésus, [......], O. Martineau, L. Mosca, X. -F. Navick, G. Nollez, P. Pari, C. Riccio, V. Sanglard, L. Schoeffel, M. Stern, L. Vagneron
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  ABSTRACT: The latest results obtained by the EDELWEISS WIMP (weakly interacting massive particles) direct detection experiment using three heat-and-ionization 320-g germanium bolometers are given. Presently the most sensitive WIMP direct detection experiment for WIMP mass >30 GeV, EDELWEISSI is testing a first region of SUSY models compatible with accelerator constraints. The status and main characteristics of EDELWEISS-II, involving in a first stage 28 germanium bolometers and able to accommodate up to 120 detectors, are briefly presented, together with neutron background estimates.
  Physics of Atomic Nuclei 10/2004; 67(11):2027-2031. · 0.57 Impact Factor
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  Available from: ArXiv

  Article: Calibration of the EDELWEISS Cryogenic Heat-and-ionisation Germanium Detectors for Dark Matter Search

  The EDELWEISS Collaboration, O. Martineau, A. Benoit, L. Berge, A. Broniatowski, L. Chabert, B. Chambon, M. Chapellier, G. Chardin, P. Charvin, [......], N. Mirabolfathi, L. Mosca, X. -F. Navick, G. Nollez, P. Pari, C. Riccio, V. Sanglard, L. Schoeffel, M. Stern, L. Vagneron
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  ABSTRACT: Several aspects of the analysis of the data obtained with the cryogenic heat-and-ionisation Ge detectors used by the EDELWEISS dark matter search experiment are presented. Their calibration, the determination of their energy threshold, fiducial volume and nuclear recoil acceptance are detailed. Comment: 27 pages, Latex, 11 figures. Submitted to NIM A
  10/2003;
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  Available from: arxiv.org

  Article: Improved Exclusion Limits from the EDELWEISS WIMP Search

  A. Benoit, L. Berge, A. Broniatowski, L. Chabert, B. Chambon, M. Chapellier, G. Chardin, P. Charvin, M. De Jesus, P. Di Stefano, [......], O. Martineau, N. Mirabolfathi, L. Mosca, X. -F. Navick, G. Nollez, P. Pari, C. Riccio, V. Sanglard, M. Stern, L. Vagneron
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  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.
  07/2002;
• Article: Improved exclusion limits from the EDELWEISS WIMP search

  A Benoit, L Bergé, A Broniatowski, L Chabert, B Chambon, M Chapellier, G Chardin, P Charvin, M De Jésus, P Di Stefano, [......], O Martineau, N Mirabolfathi, L Mosca, X.-F Navick, G Nollez, P Pari, C Riccio, V Sanglard, M Stern, L Vagneron
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  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 Fréjus Tunnel, during an effective exposure of 7.4 kg d. 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 5.4×10−6 pb, as reported by the DAMA Collaboration. A first sample of supersymmetric models are also excluded at 90% CL.
  Physics Letters B.
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  Available from: arxiv.org

  Article: Sensitivity of the EDELWEISS WIMP search to spin-dependent interactions

  A. Benoit, L. Bergé, J. Blümer, A. Broniatowski, B. Censier, L. Chabert, M. Chapellier, G. Chardin, S. Collin, M. De Jésus, [......], S. Marnieros, L. Mosca, X.-F. Navick, G. Nollez, P. Pari, M. Razeti, V. Sanglard, L. Schoeffel, M. Stern, V. Villar
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  ABSTRACT: The EDELWEISS Collaboration is searching for WIMP dark matter using natural Ge cryogenic detectors. The whole data set of the first phase of the experiment contains a fiducial exposure of 4.8 kg day on 73Ge, the naturally present (7.8%), high-spin Ge isotope. The sensitivity of the experiment to the spin-dependent WIMP-nucleon interactions is evaluated using the model-independent framework proposed by Tovey et al. [Phys. Lett. B 488 (2000) 17]. It is shown that the EDELWEISS sensitivity for the WIMP-neutron coupling is competitive when compared with results of other spin-sensitive WIMP dark matter experiments. The current experimental limits lie however two orders of magnitude higher than the most optimistic SUSY models.
  Physics Letters B.
• Article: EDELWEISS dark matter search update

  P.C.F. Di Stefano, A. Benoit, L. Bergé, J. Blümer, A. Broniatowski, B. Censier, L. Chabert, B. Chambon, M. Chapellier, G. Chardin, [......], O. Martineau, L. Mosca, X.F. Navick, G. Nollez, P. Pari, C. Riccio, V. Sanglard, M. Stern, L. Vagneron, V. Villard
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  ABSTRACT: We provide an update on the status of the EDELWEISS dark matter search. The first phase has confirmed its previously published sensitivity thanks to more data. It has also served as a test-bed for the second phase, which aims to gain two orders of magnitude in sensitivity by means of a larger, improved setup. One of the main issues which must be addressed for EDELWEISS II is the neutron background.
  New Astronomy Reviews.
• Article: Latest results from the EDELWEISS WIMP search

  S. Marnieros, A. Benoit, L. Bergé, A. Broniatowski, B. Censier, L. Chabert, B. Chambon, M. Chapellier, G. Chardin, P. Charvin, [......], O. Martineau, L. Mosca, X.F. Navick, G. Nollez, P. Pari, C. Riccio, V. Sanglard, M. Stern, L. Vagneron, V. Villard
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  ABSTRACT: The latest results obtained by the EDELWEISS Weakly Interacting Massive Particles (WIMP) direct detection experiment using three heat-and-ionization 320 g germanium bolometers are presented. Presently, the most sensitive WIMP direct detection experiment for WIMP mass >30 GeV, EDELWEISS-I is testing a range of SUSY models compatible with the accelerator constraints. The status and main characteristics of EDELWEISS-II, involving in a first stage 28 germanium bolometers, and able to accommodate up to 120 detectors, will be briefly presented.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.