The DarkSide Experiment: Present Status and Future

[摘要] DarkSide is a multi-stage program devoted to direct searches of Dark Matter particles with detectors based on double phase liquid Argon Time Projection Chamber. The DarkSide-50 setup is running underground at the Laboratori Nazionali del Gran Sasso. First it was operated with Atmospheric Argon and during that run (1422 ± 67) kg×d of truly background-free exposure has been accumulated. Obtained data made it possible to set a 90% C.L. upper limit on the WIMP-nucleon cross section of 6.1 × 10-44cm2(for a WIMP mass of 100 GeV/c2). Presently the detector is filled with Underground Argon, which is depleted in39Ar by a factor of (1.4 ± 0.2)×103with respect to Atmospheric Argon. Acquired so far (2616 ± 43) kg×d (71 live days) in combination with the data from the Atmospheric Argon run give us the 90% C.L. upper limit on the WIMP-nucleon spin-independent cross section of 2.0×10-44cm2for a WIMP mass of 100 GeV/c2. Up to date this is the best limit obtained with an argon target.

[发布机构] APC, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Obs. de Paris, Sorbonne Paris Cité, Paris; 75205, France^1;Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo; 05508-090, Brazil^2;Amherst Center for Fundamental Interactions, Dept. of Physics, University of Massachusetts, Amherst; MA; 01003, United States^3;Fermi National Accelerator Laboratory, Batavia; IL; 60510, United States^4;Pacific Northwest National Laboratory, Richland; WA; 99354, United States^5;Department of Physics, Augustana University, Sioux Falls; SD; 57197, United States^6;Istituto Nazionale di Fisica Nucleare Sezione di Roma, Roma; 00185, Italy^7;Laboratori Nazionali Del Gran Sasso, Assergi AQ; 67010, Italy^8;Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Cagliari; 09042, Italy; (10) Gran Sasso Science Institute, L'Aquila AQ; 67100, Italy; (11) Department of Physics, Universita Degli Studi, Genova; 16146, Italy; (12) Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Genova; 16146, Italy; (13) Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Milano; 20133, Italy; (14) Department of Physics, Princeton University, Princeton; NJ; 08544, United States; (15) Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Roma; 00146, Italy; (16) Department of Physics and Mathematics, Universita Degli Studi Roma Tre, Roma; 00146, Italy; (17) Department of Physics, Universita Degli Studi, Cagliari; 09042, Italy; (18) National Research Centre Kurchatov Institute, Moscow; 123182, Russia; (19) Department of Physics, University of Houston, Houston; TX; 77204, United States; (20) Department of Physics, Universita Degli Studi Federico II, Napoli, 80126, Italy; (21) Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, 80126, Italy; (22) Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow; 119991, Russia; (23) LPNHE Paris, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris; 75252, France; (24) St. Petersburg Nuclear Physics Institute NRC, Kurchatov Institute, Gatchina; 188350, Russia; (25) Physics Department, Sapienza Universita' di Roma, Roma; 00185, Italy; (26) Department of Physics and Astronomy, University of Hawai'i, Honolulu; HI; 96822, United States; (27) Department of Physics and Astronomy, University of California, Los Angeles; CA; 90095, United States; (28) Joint Institute for Nuclear Research, Dubna; 141980, Russia; (29) Department of Physics, Temple University, Philadelphia; PA; 19122, United States; (30) Kavli Institute, Enrico Fermi Institute, Dept. of Physics, University of Chicago, Chicago; IL; 60637, United States; (31) Institute of High Energy Physics, Beijing; 100049, China; (32) Laboratorio Subterráneo de Canfranc, Canfranc Estación; 22880, Spain; (33) Department of Physics, University of California, Davis; CA; 95616, United States; (34) IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg; 67037, France; (35) School of Natural Sciences, Black Hills State University, Spearfish; SD; 57799, United States; (36) Radiation Physics Laboratory, Belgorod National Research University, Belgorod; 308007, Russia; (37) National Research Nuclear University MEPhI, Moscow; 115409, Russia; (38) Department of Chemistry, Biology and Biotechnology, Universita Degli Studi, Perugia; 06123, Italy; (39) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia; 06123, Italy; (40) Smoluchowski Institute of Physics, Jagiellonian University, Krakow; 30348, Poland; (41) Department of Physics, Virginia Tech, Blacksburg; VA; 24061, United States; (42) Department of Physics, Universita Degli Studi, Milano; 20133, Italy; (43) Institute of Physics Gleb Wataghin, Universidade Estadual de Campinas, Sao Paulo; 13083-859, Brazil^9

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Atmospheric argon;Dark matter particles;Direct search;Multi stage;Phase liquids;Present status;Time projection chambers;Upper limits