1409.6829 — arXiv2

Search for Majoron-emitting modes of double-beta decay of $^{136}$Xe with EXO-200

hep-ex

/ Published

Sep 24, 2014

/ Updated

Nov 18, 2014

/ Categories

hep-ex nucl-ex physics.ins-det

/ Links

/ Authors

EXO-200 Collaboration, :, J. B. Albert, D. J. Auty, P. S. Barbeau, E. Beauchamp, D. Beck, V. Belov, C. Benitez-Medina, M. Breidenbach

and 83 more authors

T. Brunner, A. Burenkov, G. F. Cao, C. Chambers, J. Chaves, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, M. Danilov, S. J. Daugherty, C. G. Davis

, T. Didberidze

, A. Dolgolenko

, M. J. Dolinski

, P. Fierlinger

, T. N. Johnson

, L. J. Kaufman

, D. S. Leonard

, I. Ostrovskiy

, C. Y. Prescott

, J. J. Russell

, J. -L. Vuilleumier

, O. Ya. Zeldovich

/ Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on a search for various Majoron-emitting modes based on 100 kg$\cdot$yr exposure of $^{136}$Xe. A lower limit of $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ 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 $|< g^{M}_{ee} >|<$ (0.8-1.7)$\cdot$10$^{-5}$.