Details

Autor(en) / Beteiligte

• Amole, C.
• Ardid, M.
• Asner, D. M.
• Baxter, D.
• Behnke, E.
• Bhattacharjee, P.
• Borsodi, H.
• Bou-Cabo, M.
• Brice, S. J.
• Broemmelsiek, D.
• Clark, K.
• Collar, J. I.
• Cooper, P. S.
• Crisler, M.
• Dahl, C. E.
• Daley, S.
• Das, M.
• Debris, F.
• Dhungana, N.
• Fallows, S.
• Farine, J.
• Felis, I.
• Filgas, R.
• Girard, F.
• Giroux, G.
• Grandison, A.
• Hai, M.
• Hall, J.
• Harris, O.
• Jin, M.
• Krauss, C. B.
• Lafrenière, M.
• Laurin, M.
• Lawson, I.
• Levine, I.
• Lippincott, W. H.
• Mann, E.
• Maurya, D.
• Mitra, P.
• Neilson, R.
• Noble, A. J.
• Plante, A.
• Podviianiuk, R. B.
• Priya, S.
• Ramberg, E.
• Robinson, A. E.
• Rucinski, R.
• Ruschman, M.
• Scallon, O.
• Seth, S.
• Simon, P.
• Sonnenschein, A.
• Štekl, I.
• Vázquez-Jáuregui, E.
• Wells, J.
• Wichoski, U.
• Zacek, V.
• Zhang, J.
• Shkrob, I. A.

Titel

Dark matter search results from the PICO-60 CF3 I bubble chamber

Ist Teil von

• Physical review. D, 2016-03, Vol.93 (5)

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• New data are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 36.8 kg of CF3I and located in the SNOLAB underground laboratory. PICO-60 is the largest bubble chamber to search for dark matter to date. With an analyzed exposure of 92.8 livedays, PICO-60 exhibits the same excellent background rejection observed in smaller bubble chambers. Alpha decays in PICO-60 exhibit frequency-dependent acoustic calorimetry, similar but not identical to that reported recently in a C3F8 bubble chamber. PICO-60 also observes a large population of unknown background events, exhibiting acoustic, spatial, and timing behaviors inconsistent with those expected from a dark matter signal. These behaviors allow for analysis cuts to remove all background events while retaining 48.2% of the exposure. Stringent limits on weakly interacting massive particles interacting via spin-dependent proton and spin-independent processes are set, and most interpretations of the DAMA/LIBRA modulation signal as dark matter interacting with iodine nuclei are ruled out.