Results from EXO_200

Topical Research Meeting: Prospects in Neutrino Physics

Auty, D.J.^1

Dep. of Physics and Astronomy, University of Alabama, 206 Gallalee Hall, Tuscaloosa

AL

35487-0324, United States^1

关键词: Double beta decay;    Half lives;    Lower limits;    Majorana neutrino mass;    Matrix elements;    Neutrinoless double-beta decays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/598/1/012012/pdf
DOI  :  10.1088/1742-6596/598/1/012012

来源: IOP

【 摘 要 】

EXO-200 is a double-beta decay experiment that measures the half-life of the decay of136Xe. This article describes the result reported by EXO-200 in the summer 2012, with an exposure of 32.5 kg•yr, saw no signal for the 0νββ decay. This sets a lower limit for the half-life of the neutrinoless double-beta decay T0νββ1/2)% (136Xe)> 1.6 × 1025yr (90% CL), which sets a limit on the Majorana neutrino mass, depending on which matrix element used, of 140meV-380meV.