Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Volume
128
Issue
20
Abstract
The electroweak interaction in the standard model is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this Letter, we present the most precise measurement of tensor currents in the low-energy regime by examining the β−¯ν correlation of trapped 8Li ions with the Beta-decay Paul Trap. We find aβν=−0.3325±0.0013stat±0.0019syst at 1σ for the case of coupling to right-handed neutrinos (CT=−C′T), which is consistent with the standard model prediction.
