The status of tests of the standard electroweak model and of searches for new physics in
allowed nuclear β decay and neutron decay is reviewed including both theoretical and …

The current status of precision measurements in allowed nuclear beta decay is reviewed,
including neutron decay, with emphasis on their potential to look for new physics beyond the …

We present high statistics results for the isovector charges g A ud, g S ud and g T ud of the
nucleon. Calculations were carried out on eleven ensembles of gauge configurations …

The axial coupling of the nucleon, g A, is the strength of its coupling to the weak axial current
of the standard model of particle physics, in much the same way as the electric charge is the …

A bstract There are two tensions related to the Cabibbo angle of the CKM matrix. First, the
determinations of V us from K μ2, K ℓ3, and τ decays disagree at the 3σ level. Second, using …

Experimental studies of neutron decay, n→ pe ν¯, exhibit two anomalies. The first is a 8.6
(2.1) s, roughly 4 σ difference between the average beam measured neutron lifetime, τ n …

A bstract Precision measurements in allowed nuclear beta decays and neutron decay are
reviewed and analyzed both within the Standard Model and looking for new physics. The …

We present results for the isovector axial, scalar, and tensor charges g A ud, g S ud, and g T
ud of the nucleon needed to probe the Standard Model and novel physics. The axial charge …

Experiments with cold and ultracold neutrons have reached a level of precision such that
problems far beyond the scale of the present standard model of particle physics become …

This article deals with the interplay between the properties of the neutron and its basic
interactions. Many of the neutron's properties underlie a simple quark model, and we …