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)kgactive mass, operated inside a 30t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1kt 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)kgdexposure with an atmospheric argon fill. 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 ×10−44cm2for a WIMP mass of 100Gev/c2
Mari, S.M., The Darkside, C. (2015). First results from the DarkSide-50dark matter experiment at Laboratori Nazionali del Gran Sasso. PHYSICS LETTERS. SECTION B, 743, 456-466 [10.1016/j.physletb.2015.03.012].
First results from the DarkSide-50dark matter experiment at Laboratori Nazionali del Gran Sasso
MARI, Stefano Maria;
2015-01-01
Abstract
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)kgactive mass, operated inside a 30t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1kt 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)kgdexposure with an atmospheric argon fill. 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 ×10−44cm2for a WIMP mass of 100Gev/c2I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
