First Results of the Phase II SIMPLE Dark Matter Search

M. Felizardo, T. Morlat, A. C. Fernandes, T. A. Girard, J. G. Marques, A. R. Ramos, M. Auguste, D. Boyer, A. Cavaillou, C. Sudre, J. Poupeney, R. F. Payne, H. S. Miley, and J. Puibasset (The SIMPLE Collaboration)
Phys. Rev. Lett. 105, 211301 – Published 16 November 2010

Abstract

We report results of a 14.1kgd measurement with 15 superheated droplet detectors of total active mass 0.208 kg, comprising the first stage of a 30kgd Phase II experiment. In combination with the results of the neutron-spin sensitive XENON10 experiment, these results yield a limit of |ap|<0.32 for MW=50GeV/c2 on the spin-dependent sector of weakly interacting massive particle-nucleus interactions with a 50% reduction in the previously allowed region of the phase space, formerly defined by XENON, KIMS, and PICASSO. In the spin-independent sector, a limit of 2.3×105pb at MW=45GeV/c2 is obtained.

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  • Received 15 March 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.211301

© 2010 The American Physical Society

Authors & Affiliations

M. Felizardo1,2,3, T. Morlat3,4, A. C. Fernandes2,3, T. A. Girard3,4,*, J. G. Marques2,3, A. R. Ramos2,3, M. Auguste5, D. Boyer5, A. Cavaillou5, C. Sudre5, J. Poupeney5, R. F. Payne6, H. S. Miley6, and J. Puibasset7 (The SIMPLE Collaboration)

  • 1Department of Physics, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
  • 2Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal
  • 3Centro de Física Nuclear, Universidade de Lisboa, 1649–003 Lisbon, Portugal
  • 4Department of Physics, Universidade de Lisboa, Campo Grande C8, 1749-016 Lisboa, Portugal
  • 5Laboratoire Souterrain à Bas Bruit, Observatoire de la Côte d’Azur, 84400 Rustrel–Pays d’Apt, France
  • 6Pacific Northwest National Laboratory, Richland, Washington 99352, USA
  • 7Centre de Recherche sur la Matiére Divisée CNRS et Université d’Orléans, 45071 Orléans, cedex 02 France

  • *Corresponding author:criodets@cii.fc.ul.pt

Comments & Replies

Comment on “First Results of the Phase II SIMPLE Dark Matter Search”

C. E. Dahl, J. Hall, and W. H. Lippincott
Phys. Rev. Lett. 108, 259001 (2012)

Girard et al. (for the SIMPLE Collaboration) Reply:

T. A. Girard, M. Felizardo, A. C. Fernandes, J. G. Marques, and A. R. Ramos
Phys. Rev. Lett. 108, 259002 (2012)

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Vol. 105, Iss. 21 — 19 November 2010

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