Search for neutrinoless double-beta decay in 136Xe with EXO-200

M Auger; D J Auty; P S Barbeau; E Beauchamp; V Belov; C Benitez-Medina; M Breidenbach; T Brunner; A Burenkov; B Cleveland; S Cook; T Daniels; M Danilov; C G Davis; S Delaquis; R deVoe; A Dobi; M J Dolinski; A Dolgolenko; M Dunford; W Fairbank Jr; J Farine; W Feldmeier; P Fierlinger; D Franco; G Giroux; R Gornea; K Graham; G Gratta; C Hall; K Hall; C Hargrove; S Herrin; M Hughes; A Johnson; T N Johnson; A Karelin; L J Kaufman; A Kuchenkov; K S Kumar; D S Leonard; F Leonard; D Mackay; R MacLellan; M Marino; B Mong; M Montero Díez; A R Müller; R Neilson; R Nelson; A Odian; I Ostrovskiy; K O'Sullivan; C Ouellet; A Piepke; A Pocar; C Y Prescott; K Pushkin; P C Rowson; J J Russell; A Sabourov; D Sinclair; S Slutsky; V Stekhanov; T Tolba; D Tosi; K Twelker; P Vogel; J-L Vuilleumier; A Waite; T Walton; M Weber; U Wichoski; J Wodin; J D Wright; L Yang; Y-R Yen; O Ya Zeldovich; EXO Collaboration

doi:10.1103/PhysRevLett.109.032505

Search for neutrinoless double-beta decay in 136Xe with EXO-200

Phys Rev Lett. 2012 Jul 20;109(3):032505. doi: 10.1103/PhysRevLett.109.032505. Epub 2012 Jul 19.

Authors

M Auger¹, D J Auty, P S Barbeau, E Beauchamp, V Belov, C Benitez-Medina, M Breidenbach, T Brunner, A Burenkov, B Cleveland, S Cook, T Daniels, M Danilov, C G Davis, S Delaquis, R deVoe, A Dobi, M J Dolinski, A Dolgolenko, M Dunford, W Fairbank Jr, J Farine, W Feldmeier, P Fierlinger, D Franco, G Giroux, R Gornea, K Graham, G Gratta, C Hall, K Hall, C Hargrove, S Herrin, M Hughes, A Johnson, T N Johnson, A Karelin, L J Kaufman, A Kuchenkov, K S Kumar, D S Leonard, F Leonard, D Mackay, R MacLellan, M Marino, B Mong, M Montero Díez, A R Müller, R Neilson, R Nelson, A Odian, I Ostrovskiy, K O'Sullivan, C Ouellet, A Piepke, A Pocar, C Y Prescott, K Pushkin, P C Rowson, J J Russell, A Sabourov, D Sinclair, S Slutsky, V Stekhanov, T Tolba, D Tosi, K Twelker, P Vogel, J-L Vuilleumier, A Waite, T Walton, M Weber, U Wichoski, J Wodin, J D Wright, L Yang, Y-R Yen, O Ya Zeldovich; EXO Collaboration

Affiliation

¹ LHEP, Albert Einstein Center, University of Bern, Bern, Switzerland.

PMID: 22861843
DOI: 10.1103/PhysRevLett.109.032505

Abstract

We report on a search for neutrinoless double-beta decay of 136Xe with EXO-200. No signal is observed for an exposure of 32.5 kg yr, with a background of ∼1.5×10(-3) kg(-1) yr(-1) keV(-1) in the ±1σ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T(1/2)(0νββ)(136Xe)>1.6×10(25) yr (90% C.L.), corresponding to effective Majorana masses of less than 140-380 meV, depending on the matrix element calculation.