Search for Majoron-emitting modes of double-beta decay of <mml:mmultiscripts>Xe 136 </mml:mmultiscripts> with EXO-200
Abstract
EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of <mml:mmultiscripts>Xe 136 </mml:mmultiscripts> . Here, we report on a search for various Majoron-emitting modes based on 100 kg yr exposure of <mml:mmultiscripts>Xe 136 </mml:mmultiscripts> . A lower limit of T1/2 <mml:mmultiscripts>Xe 136 </mml:mmultiscripts>>1.2 ×1024 yr at 90% C.L. on the half-life of the spectral index =1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of |⟨gee M⟩|<(0.8 - 1.7 )×10-5 .
- Publication:
-
Physical Review D
- Pub Date:
- November 2014
- DOI:
- 10.1103/PhysRevD.90.092004
- Bibcode:
- 2014PhRvD..90i2004A
- Keywords:
-
- 23.40.-s;
- 14.60.Pq;
- 14.80.Va;
- 21.10.Tg;
- Beta decay;
- double beta decay;
- electron and muon capture;
- Neutrino mass and mixing;
- Lifetimes