Dark Matter Search Results from the PICO-2L C3F8 Bubble Chamber
- NázevTitle
- Dark Matter Search Results from the PICO-2L C3F8 Bubble ChamberDark Matter Search Results from the PICO-2L C3F8 Bubble Chamber
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- C. Amole, M. Ardid, D.M. Asner, R. Filgas, I. Štekl
- Klíčová slovaKeywords
- candidates, constraints, detector
- ExperimentCollaboration
- PICO
- DOIDOI
- 10.1103/PhysRevLett.114.231302
- Časopis / citaceJournal / citation
- Physical Review Letters 114(23), 231302 (2015) · ISSN 0031-9007
- RokYear
- 2015
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Příspěvek k rozšíření velké výzkumné infrastruktury evropského významuContribution of the Czech Republic to the extension of the large research infrastructure of European importance
- CitovánoCited by
- 233 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- http://link.aps.org/pdf/10.1103/PhysRevLett.114.231302
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
New data are reported from the operation of a 2 liter C3F8 bubble chamber in the SNOLAB underground laboratory, with a total exposure of 211.5 kg days at four different energy thresholds below 10 keV. These data show that C3F8 provides excellent electron-recoil and alpha rejection capabilities at very low thresholds. The chamber exhibits an electron-recoil sensitivity of < 3.5 x 10(-10) and an alpha rejection factor of > 98.2%. These data also include the first observation of a dependence of acoustic signal on alpha energy. Twelve single nuclear recoil event candidates were observed during the run. The candidate events exhibit timing characteristics that are not consistent with the hypothesis of a uniform time distribution, and no evidence for a dark matter signal is claimed. These data provide the most sensitive direct detection constraints on WIMP-proton spin-dependent scattering to date, with significant sensitivity at low WIMP masses for spin-independent WIMP-nucleon scattering.
New data are reported from the operation of a 2 liter C3F8 bubble chamber in the SNOLAB underground laboratory, with a total exposure of 211.5 kg days at four different energy thresholds below 10 keV. These data show that C3F8 provides excellent electron-recoil and alpha rejection capabilities at very low thresholds. The chamber exhibits an electron-recoil sensitivity of < 3.5 x 10(-10) and an alpha rejection factor of > 98.2%. These data also include the first observation of a dependence of acoustic signal on alpha energy. Twelve single nuclear recoil event candidates were observed during the run. The candidate events exhibit timing characteristics that are not consistent with the hypothesis of a uniform time distribution, and no evidence for a dark matter signal is claimed. These data provide the most sensitive direct detection constraints on WIMP-proton spin-dependent scattering to date, with significant sensitivity at low WIMP masses for spin-independent WIMP-nucleon scattering.