First dark matter search results from a 4-kg CF$_3$I bubble chamber operated in a deep underground site

By E. Behnke, J. Behnke, S. Brice, D. Broemmelsiek, J. Collar, A. Conner, P. Cooper, M. Crisler, C. Dahl, D. Fustin and 12 more. 2012

307 citations recorded by the source corpus.

New data are reported from the operation of a 4.0 kg CF{sub 3}I bubble chamber in the 6800 foot deep SNOLAB underground laboratory. The effectiveness of ultrasound analysis in discriminating alpha decay background events from single nuclear recoils has been confirmed, with a lower bound of >99.3% rejection of alpha decay events. Twenty single nuclear recoil event candidates and three multiple bubble events were observed during a total exposure of 553 kg-days distributed over three different bubble nucleation thresholds. The effective exposure for single bubble recoil-like events was 437.4 kg-days. A neutron background internal to the apparatus, of known origin, is estimated to account for five single nuclear recoil events and is consistent with the observed rate of multiple bubble events. This observation provides world best direct detection constraints on WIMP-proton spin-dependent scattering for WIMP masses >20 GeV/c{sup 2} and demonstrates significant sensitivity for spin-independent interactions.

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8f633e65bdab59c07175fae05e74b13f959066f7

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Beyond effective field theory for dark matter searches at the LHC (2013, unknown): “J H E P 0 1 ( 2 0 1 4 ) 0 2 5 COUPP [56], SIMPLE [57] and PICASSO [58] experiments.”
Sensitivity projections for dark matter searches with the Fermi large area telescope (2016, unknown): “[304], and the projection was made using the expected LZ sensitivity.”
Dark matter direct-detection experiments (2015, methodology): “il scale is calculated using the ’hot spike’ model of bubble nucleation[261] and it is veried by experimental data. For example, the three consecutive -decays from 222Rn can be used to test the model[262]. By varying the pressure and temperature of the detector volume, the energy threshold for a bub”
Colloquium: Annual modulation of dark matter (2013, methodology): “For this case, COUPP (Behnke et al., 2012), PICASSO (Archambault et al., 2012), and SIMPLE (Felizardo et al., 2012) provide the best limits.”