Improved limits on spin-dependent WIMP-proton interactions from a two liter CF3I bubble chamber

E. Behnke; J. Behnke; S. J. Brice; D. Broemmelsiek; J. I. Collar; P. S. Cooper; M. Crisler; C. E. Dahl; D. Fustin; J. Hall; J. H. Hinnefeld; M. Hu; I. Levine; E. Ramberg; T. Shepherd; A. Sonnenschein; M. Szydagis

doi:10.1103/PhysRevLett.106.021303

Improved limits on spin-dependent WIMP-proton interactions from a two liter CF₃I bubble chamber

E. Behnke^*, J. Behnke, S. J. Brice, D. Broemmelsiek, J. I. Collar, P. S. Cooper, M. Crisler, C. E. Dahl, D. Fustin, J. Hall, J. H. Hinnefeld, M. Hu, I. Levine, E. Ramberg, T. Shepherd, A. Sonnenschein, M. Szydagis

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

117 Scopus citations

Abstract

Data from the operation of a bubble chamber filled with 3.5 kg of CF ₃I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1kgday, consistent with a neutron background. This observation provides strong direct detection constraints on weakly interacting massive particle (WIMP)-proton spin-dependent scattering for WIMP masses >20GeV/c2.

Original language	English (US)
Article number	021303
Journal	Physical review letters
Volume	106
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.106.021303
State	Published - 2011

ASJC Scopus subject areas

Physics and Astronomy(all)

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Behnke, E., Behnke, J., Brice, S. J., Broemmelsiek, D., Collar, J. I., Cooper, P. S., Crisler, M., Dahl, C. E., Fustin, D., Hall, J., Hinnefeld, J. H., Hu, M., Levine, I., Ramberg, E., Shepherd, T., Sonnenschein, A., & Szydagis, M. (2011). Improved limits on spin-dependent WIMP-proton interactions from a two liter CF₃I bubble chamber. Physical review letters, 106(2), [021303]. https://doi.org/10.1103/PhysRevLett.106.021303

Behnke, E. ; Behnke, J. ; Brice, S. J. ; Broemmelsiek, D. ; Collar, J. I. ; Cooper, P. S. ; Crisler, M. ; Dahl, C. E. ; Fustin, D. ; Hall, J. ; Hinnefeld, J. H. ; Hu, M. ; Levine, I. ; Ramberg, E. ; Shepherd, T. ; Sonnenschein, A. ; Szydagis, M. / Improved limits on spin-dependent WIMP-proton interactions from a two liter CF₃I bubble chamber. In: Physical review letters. 2011 ; Vol. 106, No. 2.

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title = "Improved limits on spin-dependent WIMP-proton interactions from a two liter CF3I bubble chamber",

abstract = "Data from the operation of a bubble chamber filled with 3.5 kg of CF 3I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1kgday, consistent with a neutron background. This observation provides strong direct detection constraints on weakly interacting massive particle (WIMP)-proton spin-dependent scattering for WIMP masses >20GeV/c2.",

author = "E. Behnke and J. Behnke and Brice, {S. J.} and D. Broemmelsiek and Collar, {J. I.} and Cooper, {P. S.} and M. Crisler and Dahl, {C. E.} and D. Fustin and J. Hall and Hinnefeld, {J. H.} and M. Hu and I. Levine and E. Ramberg and T. Shepherd and A. Sonnenschein and M. Szydagis",

year = "2011",

doi = "10.1103/PhysRevLett.106.021303",

language = "English (US)",

volume = "106",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Behnke, E, Behnke, J, Brice, SJ, Broemmelsiek, D, Collar, JI, Cooper, PS, Crisler, M, Dahl, CE, Fustin, D, Hall, J, Hinnefeld, JH, Hu, M, Levine, I, Ramberg, E, Shepherd, T, Sonnenschein, A & Szydagis, M 2011, 'Improved limits on spin-dependent WIMP-proton interactions from a two liter CF₃I bubble chamber', Physical review letters, vol. 106, no. 2, 021303. https://doi.org/10.1103/PhysRevLett.106.021303

Improved limits on spin-dependent WIMP-proton interactions from a two liter CF₃I bubble chamber. / Behnke, E.; Behnke, J.; Brice, S. J.; Broemmelsiek, D.; Collar, J. I.; Cooper, P. S.; Crisler, M.; Dahl, C. E.; Fustin, D.; Hall, J.; Hinnefeld, J. H.; Hu, M.; Levine, I.; Ramberg, E.; Shepherd, T.; Sonnenschein, A.; Szydagis, M.

In: Physical review letters, Vol. 106, No. 2, 021303, 2011.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Improved limits on spin-dependent WIMP-proton interactions from a two liter CF3I bubble chamber

AU - Behnke, E.

AU - Behnke, J.

AU - Brice, S. J.

AU - Broemmelsiek, D.

AU - Collar, J. I.

AU - Cooper, P. S.

AU - Crisler, M.

AU - Dahl, C. E.

AU - Fustin, D.

AU - Hall, J.

AU - Hinnefeld, J. H.

AU - Hu, M.

AU - Levine, I.

AU - Ramberg, E.

AU - Shepherd, T.

AU - Sonnenschein, A.

AU - Szydagis, M.

PY - 2011

Y1 - 2011

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AB - Data from the operation of a bubble chamber filled with 3.5 kg of CF 3I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1kgday, consistent with a neutron background. This observation provides strong direct detection constraints on weakly interacting massive particle (WIMP)-proton spin-dependent scattering for WIMP masses >20GeV/c2.

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