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Title: Dark Matter Search Results from the PICO-60 C$$_3$$F$$_8$$ Bubble Chamber

Abstract

New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C$$_3$$F$$_8$$ located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C$$_3$$F$$_8$$ exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than 1 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 WIMP-proton spin-dependent cross section at 3.4 $$\times$$ 10$$^{-41}$$ cm$^2$ for a 30-GeV$$\thinspace$$c$$^{-2}$$ WIMP, more than one order of magnitude improvement from previous PICO results.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
PICO
OSTI Identifier:
1346355
Report Number(s):
FERMILAB-PUB-17-058-AE-PPD; arXiv:1702.07666
1515011
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Amole, C., and et al. Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber. United States: N. p., 2017. Web.
Amole, C., & et al. Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber. United States.
Amole, C., and et al. Fri . "Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber". United States. doi:. https://www.osti.gov/servlets/purl/1346355.
@article{osti_1346355,
title = {Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber},
author = {Amole, C. and et al.},
abstractNote = {New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C$_3$F$_8$ located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C$_3$F$_8$ exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than 1 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 WIMP-proton spin-dependent cross section at 3.4 $\times$ 10$^{-41}$ cm$^2$ for a 30-GeV$\thinspace$c$^{-2}$ WIMP, more than one order of magnitude improvement from previous PICO results.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {Fri Feb 24 00:00:00 EST 2017},
month = {Fri Feb 24 00:00:00 EST 2017}
}