Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.032505
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- DOE
- NSF in the United States
- NSERC in Canada
- SNF in Switzerland
- NRF in Korea
- RFBR in Russia
- Direct For Mathematical & Physical Scien
- Division Of Physics [0855605, 0918469, 1209907, 1132428] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [0811508, 0969259] Funding Source: National Science Foundation
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We report on a search for neutrinoless double-beta decay of Xe-136 with EXO-200. No signal is observed for an exposure of 32.5 kg yr, with a background of similar to 1.5 x 10(-3) kg(-1) yr(-1) keV(-1) in the +/- 1 sigma region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T-1/2(0 nu beta beta) (Xe-136) > 1.6 x 10(25) yr (90% C. L.), corresponding to effective Majorana masses of less than 140-380 meV, depending on the matrix element calculation.
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