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Dark Matter Search Results from the PICO-60C(3)F(8) Bubble Chamber
Journal article   Open access   Peer reviewed

Dark Matter Search Results from the PICO-60C(3)F(8) Bubble Chamber

C. Amole, M. Ardid, I. J. Arnquist, D. M. Asner, D. Baxter, E. Behnke, P. Bhattacharjee, H. Borsodi, M. Bou-Cabo, P. Campion, …
Physical review letters, v 118(25)
23 Jun 2017
PMID: 28696731
url
https://doi.org/10.1103/physrevlett.118.251301View
Accepted (AM)Open Access (Publisher-Specific) Open
url
https://doi.org/10.1103/PhysRevLett.118.251301View
Published, Version of Record (VoR) Open

Abstract

Physical Sciences Physics Physics, Multidisciplinary Science & Technology ESI Highly Cited Paper (Incites)
New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C3F8 located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C3F8 exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than one event per month. A blind analysis of an efficiency-corrected 1167-kg day exposure at a 3.3-keV thermodynamic threshold reveals no single-scattering nuclear recoil candidates, consistent with the predicted background. These results set the most stringent direct-detection constraint to date on the weakly interacting massive particle (WIMP)-proton spin-dependent cross section at 3.4 x 10(-41) cm(2) for a 30-GeVc(-2) WIMP, more than 1 order of magnitude improvement from previous PICO results.

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Physics, Multidisciplinary
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