期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.091301
关键词
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资金
- NSF [PHY-0302646, PHY-04-00596]
- the CAREER [PHY-0542066]
- the DOE [DE-FG02-91ER40688]
- the Swiss National Foundation SNF [20-118119]
- the Volkswagen Foundation (Germany)
- the FCT [POCI/FIS/605342004]
- LNGS/INFN
XENON10 is an experiment to directly detect weakly interacting massive particles (WIMPs), which may comprise the bulk of the nonbaryonic dark matter in our Universe. We report new results for spin-dependent WIMP-nucleon interactions with Xe-129 and Xe-131 from 58.6 live days of operation at the Laboratori Nazionali del Gran Sasso. Based on the nonobservation of a WIMP signal in 5.4 kg of fiducial liquid xenon mass, we exclude previously unexplored regions in the theoretically allowed parameter space for neutralinos. We also exclude a heavy Majorana neutrino with a mass in the range of similar to 10 GeV/c(2) -2 TeV/c(2) as a dark matter candidate under standard assumptions for its density and distribution in the galactic halo.
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