title: Observation of two-neutrino double-beta decay in 136Xe with the EXO-200 detector.
abstract: We report the observation of two-neutrino double-beta decay in (136)Xe with T(1/2) = 2.11 ± 0.04(stat) ± 0.21(syst) × 10(21) yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for (136)Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
authors.affiliation: SLAC National Accelerator Laboratory, Stanford, California, USA.
authors.forename: N
authors.initials: N
authors.lastname: Ackerman
authors.forename: B
authors.initials: B
authors.lastname: Aharmim
authors.forename: M
authors.initials: M
authors.lastname: Auger
authors.forename: D J
authors.initials: DJ
authors.lastname: Auty
authors.forename: P S
authors.initials: PS
authors.lastname: Barbeau
authors.forename: K
authors.initials: K
authors.lastname: Barry
authors.forename: L
authors.initials: L
authors.lastname: Bartoszek
authors.forename: E
authors.initials: E
authors.lastname: Beauchamp
authors.forename: V
authors.initials: V
authors.lastname: Belov
authors.forename: C
authors.initials: C
authors.lastname: Benitez-Medina
authors.forename: M
authors.initials: M
authors.lastname: Breidenbach
authors.forename: A
authors.initials: A
authors.lastname: Burenkov
authors.forename: B
authors.initials: B
authors.lastname: Cleveland
authors.forename: R
authors.initials: R
authors.lastname: Conley
authors.forename: E
authors.initials: E
authors.lastname: Conti
authors.forename: J
authors.initials: J
authors.lastname: Cook
authors.forename: S
authors.initials: S
authors.lastname: Cook
authors.forename: A
authors.initials: A
authors.lastname: Coppens
authors.forename: I
authors.initials: I
authors.lastname: Counts
authors.forename: W
authors.initials: W
authors.lastname: Craddock
authors.forename: T
authors.initials: T
authors.lastname: Daniels
authors.forename: M V
authors.initials: MV
authors.lastname: Danilov
authors.forename: C G
authors.initials: CG
authors.lastname: Davis
authors.forename: J
authors.initials: J
authors.lastname: Davis
authors.forename: R
authors.initials: R
authors.lastname: deVoe
authors.forename: Z
authors.initials: Z
authors.lastname: Djurcic
authors.forename: A
authors.initials: A
authors.lastname: Dobi
authors.forename: A G
authors.initials: AG
authors.lastname: Dolgolenko
authors.forename: M J
authors.initials: MJ
authors.lastname: Dolinski
authors.forename: K
authors.initials: K
authors.lastname: Donato
authors.forename: M
authors.initials: M
authors.lastname: Dunford
authors.forename: W
authors.initials: W
authors.lastname: Fairbank
authors.forename: J
authors.initials: J
authors.lastname: Farine
authors.forename: P
authors.initials: P
authors.lastname: Fierlinger
authors.forename: D
authors.initials: D
authors.lastname: Franco
authors.forename: D
authors.initials: D
authors.lastname: Freytag
authors.forename: G
authors.initials: G
authors.lastname: Giroux
authors.forename: R
authors.initials: R
authors.lastname: Gornea
authors.forename: K
authors.initials: K
authors.lastname: Graham
authors.forename: G
authors.initials: G
authors.lastname: Gratta
authors.forename: M P
authors.initials: MP
authors.lastname: Green
authors.forename: C
authors.initials: C
authors.lastname: Hägemann
authors.forename: C
authors.initials: C
authors.lastname: Hall
authors.forename: K
authors.initials: K
authors.lastname: Hall
authors.forename: G
authors.initials: G
authors.lastname: Haller
authors.forename: C
authors.initials: C
authors.lastname: Hargrove
authors.forename: R
authors.initials: R
authors.lastname: Herbst
authors.forename: S
authors.initials: S
authors.lastname: Herrin
authors.forename: J
authors.initials: J
authors.lastname: Hodgson
authors.forename: M
authors.initials: M
authors.lastname: Hughes
authors.forename: A
authors.initials: A
authors.lastname: Johnson
authors.forename: A
authors.initials: A
authors.lastname: Karelin
authors.forename: L J
authors.initials: LJ
authors.lastname: Kaufman
authors.forename: T
authors.initials: T
authors.lastname: Koffas
authors.forename: A
authors.initials: A
authors.lastname: Kuchenkov
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.forename: K S
authors.initials: KS
authors.lastname: Kumar
authors.forename: D S
authors.initials: DS
authors.lastname: Leonard
authors.forename: F
authors.initials: F
authors.lastname: Leonard
authors.forename: F
authors.initials: F
authors.lastname: LePort
authors.forename: D
authors.initials: D
authors.lastname: Mackay
authors.forename: R
authors.initials: R
authors.lastname: MacLellan
authors.forename: M
authors.initials: M
authors.lastname: Marino
authors.forename: Y
authors.initials: Y
authors.lastname: Martin
authors.forename: B
authors.initials: B
authors.lastname: Mong
authors.forename: M Montero
authors.initials: MM
authors.lastname: Díez
authors.forename: P
authors.initials: P
authors.lastname: Morgan
authors.forename: A R
authors.initials: AR
authors.lastname: Müller
authors.forename: R
authors.initials: R
authors.lastname: Neilson
authors.forename: R
authors.initials: R
authors.lastname: Nelson
authors.forename: A
authors.initials: A
authors.lastname: Odian
authors.forename: K
authors.initials: K
authors.lastname: O'Sullivan
authors.forename: C
authors.initials: C
authors.lastname: Ouellet
authors.forename: A
authors.initials: A
authors.lastname: Piepke
authors.forename: A
authors.initials: A
authors.lastname: Pocar
authors.forename: C Y
authors.initials: CY
authors.lastname: Prescott
authors.forename: K
authors.initials: K
authors.lastname: Pushkin
authors.forename: A
authors.initials: A
authors.lastname: Rivas
authors.forename: E
authors.initials: E
authors.lastname: Rollin
authors.forename: P C
authors.initials: PC
authors.lastname: Rowson
authors.forename: J J
authors.initials: JJ
authors.lastname: Russell
authors.forename: A
authors.initials: A
authors.lastname: Sabourov
authors.forename: D
authors.initials: D
authors.lastname: Sinclair
authors.forename: K
authors.initials: K
authors.lastname: Skarpaas
authors.forename: S
authors.initials: S
authors.lastname: Slutsky
authors.forename: V
authors.initials: V
authors.lastname: Stekhanov
authors.forename: V
authors.initials: V
authors.lastname: Strickland
authors.forename: M
authors.initials: M
authors.lastname: Swift
authors.forename: D
authors.initials: D
authors.lastname: Tosi
authors.forename: K
authors.initials: K
authors.lastname: Twelker
authors.forename: P
authors.initials: P
authors.lastname: Vogel
authors.forename: J-L
authors.initials: JL
authors.lastname: Vuilleumier
authors.forename: J-M
authors.initials: JM
authors.lastname: Vuilleumier
authors.forename: A
authors.initials: A
authors.lastname: Waite
authors.forename: S
authors.initials: S
authors.lastname: Waldman
authors.forename: T
authors.initials: T
authors.lastname: Walton
authors.forename: K
authors.initials: K
authors.lastname: Wamba
authors.forename: M
authors.initials: M
authors.lastname: Weber
authors.forename: U
authors.initials: U
authors.lastname: Wichoski
authors.forename: J
authors.initials: J
authors.lastname: Wodin
authors.forename: J D
authors.initials: JD
authors.lastname: Wright
authors.forename: L
authors.initials: L
authors.lastname: Yang
authors.forename: Y-R
authors.initials: YR
authors.lastname: Yen
authors.forename: O Ya
authors.initials: OY
authors.lastname: Zeldovich