Exclusion Limits on the WIMP-Nucleon Cross-Section from the Cryogenic Dark Matter Search
| Autor: | M. B. Crisler, H. N. Nelson, R. Bunker, S. Eichblatt, J. Emes, T. A. Shutt, E. E. Haller, P. L. Brink, Alexander Bolozdynya, Josef Jochum, B. L. Dougherty, R. L. Dixon, Ronald R. Ross, G. Smith, M. J. Penn, Stephen H. White, R. W. Schnee, J. Hellmig, A. Da Silva, Bernard Sadoulet, J. P. Castle, Andrew Sonnenschein, A. C. Cummings, F. P. Lipschultz, A. Lu, John M. Martinis, B. Neuhauser, Kent D. Irwin, Peter D. Barnes, A. L. Spadafora, J. D. Taylor, P. Shestople, R. Abusaidi, W. Stockwell, Betty A. Young, Boris Pritychenko, R. M. Clarke, P. Colling, Vuk Mandic, Blas Cabrera, Sunil Golwala, A. K. Davies, D. Driscoll, R. J. Gaitskell, D. N. Seitz, D. S. Akerib, Daniel E. Hale, Sae Woo Nam, D. A. Bauer, M. C. Perillo Isaac, D. O. Caldwell, Tarek Saab, Thushara Perera, S. J. Yellin, Martin E. Huber, A. R. Smith |
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| Rok vydání: | 2000 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics Physics::Instrumentation and Detectors Dark matter General Physics and Astronomy FOS: Physical sciences Elementary particle Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 7. Clean energy 01 natural sciences High Energy Physics - Experiment Nuclear physics High Energy Physics - Experiment (hep-ex) WIMP 0103 physical sciences Neutron 010306 general physics Light dark matter Elastic scattering Physics 010308 nuclear & particles physics Astrophysics (astro-ph) Astrophysics::Instrumentation and Methods for Astrophysics Baryon Weakly interacting massive particles High Energy Physics::Experiment Halo Cryogenic Dark Matter Search Nucleon Caltech Library Services |
| DOI: | 10.48550/arxiv.astro-ph/0002471 |
| Popis: | The Cryogenic Dark Matter Search (CDMS) employs low-temperature Ge and Si detectors to search for Weakly Interacting Massive Particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. For recoil energies above 10 keV, events due to background photons are rejected with >99.9% efficiency, and surface events are rejected with >95% efficiency. The estimate of the background due to neutrons is based primarily on the observation of multiple-scatter events that should all be neutrons. Data selection is determined primarily by examining calibration data and vetoed events. Resulting efficiencies should be accurate to about 10%. Results of CDMS data from 1998 and 1999 with a relaxed fiducial-volume cut (resulting in 15.8 kg-days exposure on Ge) are consistent with an earlier analysis with a more restrictive fiducial-volume cut. Twenty-three WIMP candidate events are observed, but these events are consistent with a background from neutrons in all ways tested. Resulting limits on the spin-independent WIMP-nucleon elastic-scattering cross-section exclude unexplored parameter space for WIMPs with masses between 10-70 GeV c^{-2}. These limits border, but do not exclude, parameter space allowed by supersymmetry models and accelerator constraints. Results are compatible with some regions reported as allowed at 3-sigma by the annual-modulation measurement of the DAMA collaboration. However, under the assumptions of standard WIMP interactions and a standard halo, the results are incompatible with the DAMA most likely value at >99.9% CL, and are incompatible with the model-independent annual-modulation signal of DAMA at 99.99% CL in the asymptotic limit. 40 pages, 49 figures (4 in color), submitted to Phys. Rev. D; v.2:clarified conclusions, added content and references based on referee's and readers' comments; v.3: clarified introductory sections, added figure based on referee's comments |
| Databáze: | OpenAIRE |
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