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Dark Matter Search Results from the PICO-2L C3F8 Bubble Chamber.
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; Farine, J; Felis, I; Filgas, R; Fines-Neuschild, M; Girard, F; Giroux, G; Hai, M; Hall, J; Harris, O; Jackson, C M; Jin, M; Krauss, C B; Lafrenière, M; Laurin, M; Lawson, I; Levine, I; Lippincott, W H; Mann, E; Martin, J P; Maurya, D; Mitra, P; Neilson, R; Noble, A J; Plante, A; Podviianiuk, R B; Priya, S; Robinson, A E; Ruschman, M; Scallon, O; Seth, S; Sonnenschein, A.
Afiliação
  • Amole C; Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
  • Ardid M; Universitat Politècnica de València, IGIC, 46730 Gandia, Spain.
  • Asner DM; Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
  • Baxter D; Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
  • Behnke E; Department of Physics and Astronomy, Indiana University South Bend, South Bend, Indiana 46634, USA.
  • Bhattacharjee P; Saha Institute of Nuclear Physics, Astroparticle Physics and Cosmology Division, Kolkata, West Bengal 700064, India.
  • Borsodi H; Department of Physics and Astronomy, Indiana University South Bend, South Bend, Indiana 46634, USA.
  • Bou-Cabo M; Universitat Politècnica de València, IGIC, 46730 Gandia, Spain.
  • Brice SJ; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Broemmelsiek D; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Clark K; Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada.
  • Collar JI; Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
  • Cooper PS; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Crisler M; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Dahl CE; Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
  • Daley S; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Das M; Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
  • Debris F; Saha Institute of Nuclear Physics, Astroparticle Physics and Cosmology Division, Kolkata, West Bengal 700064, India.
  • Dhungana N; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Farine J; Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
  • Felis I; Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
  • Filgas R; Universitat Politècnica de València, IGIC, 46730 Gandia, Spain.
  • Fines-Neuschild M; Institute of Experimental and Applied Physics, Czech Technical University in Prague, Prague 12800, Czech Republic.
  • Girard F; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Giroux G; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Hai M; Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
  • Hall J; Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
  • Harris O; Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
  • Jackson CM; Department of Physics and Astronomy, Indiana University South Bend, South Bend, Indiana 46634, USA.
  • Jin M; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Krauss CB; Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
  • Lafrenière M; Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
  • Laurin M; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Lawson I; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Levine I; Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
  • Lippincott WH; SNOLAB, Lively, Ontario P3Y 1N2, Canada.
  • Mann E; Department of Physics and Astronomy, Indiana University South Bend, South Bend, Indiana 46634, USA.
  • Martin JP; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Maurya D; Department of Physics and Astronomy, Indiana University South Bend, South Bend, Indiana 46634, USA.
  • Mitra P; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Neilson R; Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA.
  • Noble AJ; Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
  • Plante A; Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
  • Podviianiuk RB; Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
  • Priya S; Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
  • Robinson AE; Département de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Ruschman M; Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
  • Scallon O; Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA.
  • Seth S; Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
  • Sonnenschein A; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
Phys Rev Lett ; 114(23): 231302, 2015 Jun 12.
Article em En | MEDLINE | ID: mdl-26196790
ABSTRACT
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 <3.5×10(-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.
Assuntos
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Base de dados: MEDLINE Assunto principal: Fluorocarbonos / Modelos Teóricos Idioma: En Ano de publicação: 2015 Tipo de documento: Article
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Base de dados: MEDLINE Assunto principal: Fluorocarbonos / Modelos Teóricos Idioma: En Ano de publicação: 2015 Tipo de documento: Article