skip to main content

DOE PAGESDOE PAGES

Title: First results from the DarkSide-50 dark matter experiment at Laboratori Nazionali del Gran Sasso

We report the first results of DarkSide-50, a direct search for dark matter operating in the underground Laboratori Nazionali del Gran Sasso (LNGS) and searching for the rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The dark matter detector is a Liquid Argon Time Projection Chamber with a (46.4 ± 0.7) kg active mass, operated inside a 30 t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1 kt water Cherenkov veto for the residual flux of cosmic rays. We report here the null results of a dark matter search for a (1422 ± 67) kg d exposure with an atmospheric argon fill. As a result, this is the most sensitive dark matter search performed with an argon target, corresponding to a 90% CL upper limit on the WIMP-nucleon spin-independent cross section of 6.1×10-44 cm2 for a WIMP mass of 100 Gev/c2.
Authors:
 [1]
  1. Univ. Paris Diderot, Paris, (France). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-14-389-AE-E
Journal ID: ISSN 0370-2693; arXiv eprint number arXiv:1410.0653; TRN: US1600991
Grant/Contract Number:
AC02-07CH11359; FG02-91ER40671; PHY-0919363; PHY-1004072; PHY-1211308; UMO-2012/05/E/ST2/02333; PHY-1125897
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 743; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
DarkSide Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter; WIMP; noble liquid detectors; low-background detectors; liquid scintillators; 47 OTHER INSTRUMENTATION
OSTI Identifier:
1228403
Alternate Identifier(s):
OSTI ID: 1226295; OSTI ID: 1307520