Direct Search for Dark Matter with DarkSide

[摘要] The DarkSide experiment is designed for the direct detection of Dark Matter with a double phase liquid Argon TPC operating underground at Laboratori Nazionali del Gran Sasso. The TPC is placed inside a 30 tons liquid organic scintillator sphere, acting as a neutron veto, which is in turn installed inside a 1 kt water Cherenkov detector. The current detector is running since November 2013 with a 50 kg atmospheric Argon fill and we report here the first null results of a Dark Matter search for a (1422 ± 67) kg.d exposure. This result correspond to a 90% CL upper limit on the WIMP-nucleon cross section of 6.1 × 10-44cm2(for a WIMP mass of 100 GeV/c2) and it's currently the most sensitive limit obtained with an Argon target.

[发布机构] APC, Université Paris Diderot, Sorbonne Paris Cité, Paris; 75205, France^1;Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst; MA; 01003, United States^2;Physics and Astronomy Department, Augustana College, Sioux Falls; SD; 57197, United States^3;Physics and Astronomy Department, University of California, Los Angeles; CA; 90095, United States^4;Department of Physics, Princeton University, Princeton; NJ; 08544, United States^5;Fermi National Accelerator Laboratory, Batavia; IL; 60510, United States^6;Laboratori Nazionali Del Gran Sasso, Assergi (AQ); 67010, Italy^7;Gran Sasso Science Institute, L'Aquila; 67100, Italy^8;Physics Department, Università Degli Studi, INFN, Milano; 20133, Italy; (10) Physics Department, Università Degli Studi Roma Tre, INFN, Roma; 00146, Italy; (11) Physics Department, Università Degli Studi, INFN, Genova; 16146, Italy; (12) Kavli Institute, Enrico Fermi Institute, Dept. of Physics, University of Chicago, Chicago; IL; 60637, United States; (13) Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow; 119991, Russia; (14) Physics Department, Università Degli Studi Federico II, INFN, Napoli; 80126, Italy; (15) Department of Physics, University of Houston, Houston; TX; 77204, United States; (16) St. Petersburg Nuclear Physics Institute, Gatchina; 188350, Russia; (17) Physics Department, Università Degli Studi, INFN, Cagliari; 09042, Italy; (18) Department of Physics and Astronomy, University of Hawai'i, Honolulu; HI; 96822, United States; (19) Joint Institute for Nuclear Research, Dubna; 141980, Russia; (20) Institute of High Energy Physics, Beijing; 100049, China; (21) IPHC, Université de Strasbourg, CNRS, IN2P3, Strasbourg; 67037, France; (22) School of Natural Sciences, Black Hills State University, Spearfish; SD; 57799, United States; (23) Physics Department, Virginia Tech, Blacksburg; VA; 24061, United States; (24) Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kiev; 03680, Ukraine; (25) Physics Department, Temple University, Philadelphia; PA; 19122, United States; (26) SLAC National Accelerator Laboratory, Menlo Park; CA; 94025, United States; (27) National Research Centre, Kurchatov Institute, Moscow; 123182, Russia; (28) National Research Nuclear University, MEPhI (Moscow Engineering Physics Institute), Moscow; 115409, Russia; (29) Chemistry, Biology and Biotechnology Department, Universita Degli Studi, INFN, Perugia; 06123, Italy; (30) Physics Department, University of California, Davis; CA; 95616, United States; (31) Smoluchowski Institute of Physics, Jagiellonian University, Krakow; 30059, Poland; (32) Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore; CA; 94550, United States^9

[关键词] Atmospheric argon;Current detector;Dark matter searches;Direct detection;Direct search;Liquid organic scintillator;Phase liquids;Water Cherenkov detectors