Dark matter search results from the PICO-60 CF3I bubble chamber
- NázevTitle
- Dark matter search results from the PICO-60 CF3I bubble chamberDark matter search results from the PICO-60 CF3I bubble chamber
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- C Amole, M Ardid, R. Filgas, I. Štekl, JI Collar, al. et
- Klíčová slovaKeywords
- dark matter, neutralino
- ExperimentCollaboration
- PICO
- DOIDOI
- 10.1103/PhysRevD.93.052014
- Časopis / citaceJournal / citation
- Physical Review D 93(5), 052014 (2016) · ISSN 2470-0010
- RokYear
- 2016
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Podzemní laboratoř LSM (Laboratoire Souterrain de Modane, Francie) - český příspěvek do výzkumné infrastruktury evropského významuUnderground laboratory LSM (Laboratoire Souterrain de Modane, Francie) - Czech contribution to research infrastructure of European level
- CitovánoCited by
- 255 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- https://arxiv.org/pdf/1510.07754
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
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.
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.