title: Limit on Tensor Currents from ^{8}Li β Decay.
abstract: In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν[over ¯] correlation in ^{6}He β decay dating back over a half century. In the present work, the β-ν[over ¯]-α correlation in the β decay of ^{8}Li and subsequent α-particle breakup of the ^{8}Be^{*} daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (C_{T}=-C_{T}^{'}) limits the tensor fraction to |C_{T}/C_{A}|^{2}<0.011 (95.5% C.L.). The measurement confirms the ^{6}He result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.
authors.affiliation: Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.|Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.|Department of Physics, University of Washington, Seattle, Washington 98195, USA.
authors.forename: M G
authors.initials: MG
authors.lastname: Sternberg
authors.affiliation: Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: R
authors.initials: R
authors.lastname: Segel
authors.affiliation: Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: N D
authors.initials: ND
authors.lastname: Scielzo
authors.affiliation: Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.|Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: G
authors.initials: G
authors.lastname: Savard
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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authors.initials: JA
authors.lastname: Clark
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: P F
authors.initials: PF
authors.lastname: Bertone
authors.affiliation: Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.
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authors.lastname: Buchinger
authors.affiliation: Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.|Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: M
authors.initials: M
authors.lastname: Burkey
authors.affiliation: Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.|Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: S
authors.initials: S
authors.lastname: Caldwell
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.|Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Chaudhuri
authors.affiliation: Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.
authors.forename: J E
authors.initials: JE
authors.lastname: Crawford
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Louisiana 70803, USA.|Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Deibel
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: J
authors.initials: J
authors.lastname: Greene
authors.affiliation: Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.
authors.forename: S
authors.initials: S
authors.lastname: Gulick
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.|Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: D
authors.initials: D
authors.lastname: Lascar
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A F
authors.initials: AF
authors.lastname: Levand
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.|Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.|Canadian Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Li
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A
authors.initials: A
authors.lastname: Pérez Galván
authors.affiliation: Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
authors.forename: K S
authors.initials: KS
authors.lastname: Sharma
authors.affiliation: Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.|Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: J
authors.initials: J
authors.lastname: Van Schelt
authors.affiliation: Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.|Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Yee
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: B J
authors.initials: BJ
authors.lastname: Zabransky