Limits on Spin-Independent Interactions of Weakly Interacting Massive Particles with Nucleons from the Two-Tower Run of the Cryogenic Dark Matter Search
Creators
- Akerib, D.S.1
- Bailey, C.N.1
- Brusov, P.P.1
- Dragowsky, M.R.1
- Driscoll, D.D.1
- Grant, D.R.1
- Hennings-Yeomans, R.1
- Kamat, S.1
- Perera, T.A.1
- Schnee, R.W.1
- Attisha, M.J.2
- Gaitskell, R.J.2
- Thompson, J-P.F.2
- Baudis, L.3
- Leclercq, S.3
- Bauer, D.A.4
- Crisler, M.B.4
- Dixon, R.4
- Holmgren, D.4
- Ramberg, E.4
- and others
- CDMS Collaboration
- 1. Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106 (United States)
- 2. Department of Physics, Brown University, Providence, Rhode Island 02912 (United States)
- 3. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
- 4. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
Description
We report new results from the Cryogenic Dark Matter Search (CDMS II) at the Soudan Underground Laboratory. Two towers, each consisting of six detectors, were operated for 74.5 live days, giving spectrum-weighted exposures of 34 (12) kg d for the Ge (Si) targets after cuts, averaged over recoil energies 10-100 keV for a weakly interacting massive particle (WIMP) mass of 60 GeV/c2. A blind analysis was conducted, incorporating improved techniques for rejecting surface events. No WIMP signal exceeding expected backgrounds was observed. When combined with our previous results from Soudan, the 90% C.L. upper limit on the spin-independent WIMP-nucleon cross section is 1.6x10-43 cm2 from Ge and 3x10-42 cm2 from Si, for a WIMP mass of 60 GeV/c2. The combined limit from Ge (Si) is a factor of 2.5 (10) lower than our previous results and constrains predictions of supersymmetric models
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 96
- Journal Issue
- 1
- Journal Page Range
- p. 011302-011302.5
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37078565
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- CROSS SECTIONS; GEV RANGE 10-100; KEV RANGE 10-100; MASS; NONLUMINOUS MATTER; NUCLEONS; SPARTICLES; SPIN; SUPERSYMMETRY; UNDERGROUND FACILITIES
- Descriptors DEC
- ANGULAR MOMENTUM; BARYONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; KEV RANGE; MATTER; PARTICLE PROPERTIES; POSTULATED PARTICLES; SYMMETRY
Optional Information
- Notes
- (c) 2006 The American Physical Society
- Collaborations
- CDMS Collaboration