title: Determination of the axial-vector weak coupling constant with ultracold neutrons.
abstract: A precise measurement of the neutron decay β asymmetry A₀ has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A₀ = -0.119 66±0.000 89{-0.001 40}{+0.001 23}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{A}/g{V}=-1.275 90{-0.004 45}{+0.004 09}.
authors.affiliation: Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USA.
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: M P
authors.initials: MP
authors.lastname: Mendenhall
authors.forename: A T
authors.initials: AT
authors.lastname: Holley
authors.forename: H O
authors.initials: HO
authors.lastname: Back
authors.forename: T J
authors.initials: TJ
authors.lastname: Bowles
authors.forename: L J
authors.initials: LJ
authors.lastname: Broussard
authors.forename: R
authors.initials: R
authors.lastname: Carr
authors.forename: S
authors.initials: S
authors.lastname: Clayton
authors.forename: S
authors.initials: S
authors.lastname: Currie
authors.forename: B W
authors.initials: BW
authors.lastname: Filippone
authors.forename: A
authors.initials: A
authors.lastname: García
authors.forename: P
authors.initials: P
authors.lastname: Geltenbort
authors.forename: K P
authors.initials: KP
authors.lastname: Hickerson
authors.forename: J
authors.initials: J
authors.lastname: Hoagland
authors.forename: G E
authors.initials: GE
authors.lastname: Hogan
authors.forename: B
authors.initials: B
authors.lastname: Hona
authors.forename: T M
authors.initials: TM
authors.lastname: Ito
authors.forename: C-Y
authors.initials: CY
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Makela
authors.forename: R R
authors.initials: RR
authors.lastname: Mammei
authors.forename: J W
authors.initials: JW
authors.lastname: Martin
authors.forename: D
authors.initials: D
authors.lastname: Melconian
authors.forename: C L
authors.initials: CL
authors.lastname: Morris
authors.forename: R W
authors.initials: RW
authors.lastname: Pattie
authors.forename: A
authors.initials: A
authors.lastname: Pérez Galván
authors.forename: M L
authors.initials: ML
authors.lastname: Pitt
authors.forename: B
authors.initials: B
authors.lastname: Plaster
authors.forename: J C
authors.initials: JC
authors.lastname: Ramsey
authors.forename: R
authors.initials: R
authors.lastname: Rios
authors.forename: R
authors.initials: R
authors.lastname: Russell
authors.forename: A
authors.initials: A
authors.lastname: Saunders
authors.forename: S J
authors.initials: SJ
authors.lastname: Seestrom
authors.forename: W E
authors.initials: WE
authors.lastname: Sondheim
authors.forename: E
authors.initials: E
authors.lastname: Tatar
authors.forename: R B
authors.initials: RB
authors.lastname: Vogelaar
authors.forename: B
authors.initials: B
authors.lastname: VornDick
authors.forename: C
authors.initials: C
authors.lastname: Wrede
authors.forename: H
authors.initials: H
authors.lastname: Yan
authors.forename: A R
authors.initials: AR
authors.lastname: Young