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Dark Matter Search Results from the Complete Exposure of the PICO-60 C$$_3$$F$$_8$$ Bubble Chamber

Journal Article · · Phys.Rev.D
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  1. Queen's U., Kingston
  2. Valencia, Polytechnic U.
  3. PNL, Richland
  4. Northwestern U.; Chicago U.; Chicago U., EFI; Chicago U., KICP
  5. Indiana U., South Bend
  6. Drexel U.
  7. Northwestern U.
  8. Chicago U.; Chicago U., EFI; Chicago U., KICP
  9. Fermilab
  10. Alberta U.
  11. Fermilab; PNL, Richland
  12. Alberta U.; Mexico U.
  13. Northwestern U.; Fermilab
  14. Saha Inst.
  15. Laurentian U.
  16. IEAP CTU, Prague
  17. Laurentian U.; Montreal U.
  18. SNOLAB, Lively
  19. Northeastern Illinois U.
  20. Montreal U.
  21. Laurentian U.; SNOLAB, Lively
  22. Penn State U.
  23. Mexico U.; Laurentian U.
+ Show Author Affiliations
Final results are reported from operation of the PICO-60 C3F8 dark matter detector, a bubble chamber filled with 52 kg of C3F8 located in the SNOLAB underground laboratory. The chamber was operated at thermodynamic thresholds as low as 1.2 keV without loss of stability. A new blind 1404-kg-day exposure at 2.45 keV threshold was acquired with approximately the same expected total background rate as the previous 1167-kg-day exposure at 3.3 keV. This increased exposure is enabled in part by a new optical tracking analysis to better identify events near detector walls, permitting a larger fiducial volume. These results set the most stringent direct-detection constraint to date on the weakly interacting massive particle (WIMP)-proton spin-dependent cross section at 3.2×10-41  cm2 for a 25 GeV WIMP, improving on previous PICO results for 3–5 GeV WIMPs by an order of magnitude.
Research Organization:
Alberta U.; Chicago U.; Chicago U., EFI; Chicago U., KICP; Drexel U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); IEAP CTU, Prague; Indiana U., South Bend; Laurentian U.; Mexico U.; Montreal U.; Northeastern Illinois U.; Northwestern U.; Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Penn State U.; Queen's U., Kingston; SNOLAB, Lively; Saha Inst.; Univ. of California, Santa Barbara, CA (United States); Valencia, Polytechnic U.
Sponsoring Organization:
US Department of Energy; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Organization:
PICO Collaboration
Grant/Contract Number:
AC02-07CH11359; AC05-76RL01830; SC0011702; SC0012161
OSTI ID:
1529344
Alternate ID(s):
OSTI ID: 1600663
OSTI ID: 1546455
OSTI ID: 1777250
Report Number(s):
FERMILAB-PUB-19-073-AE-E; oai:inspirehep.net:1719421; arXiv:1902.04031
Journal Information:
Phys.Rev.D, Journal Name: Phys.Rev.D Journal Issue: 2 Vol. 100
Country of Publication:
United States
Language:
English

Figures / Tables (11)

FIG. 1(p. 3)figure FIG. 1
TABLE I(p. 3)table TABLE I
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
TABLE II(p. 5)table TABLE II
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 7)figure FIG. 6
FIG. 7(p. 7)figure FIG. 7
TABLE III(p. 7)table TABLE III
FIG. 8(p. 8)figure FIG. 8

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