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 …

Precision measurements in nuclear β decay offer a sensitive window to search for new
physics beyond the standard electroweak model. Searches for new physics are also a …

We have measured the free neutron lifetime τn by storage of ultra-cold neutrons (UCN) in a
Fomblin coated UCN trap of in situ variable size. The method was initially developed by W …

We evaluate the impact of recent developments in hadron phenomenology on extracting
possible fundamental tensor interactions beyond the standard model. We show that a novel …

The role of β decay as a low-energy probe of physics beyond the standard model is
reviewed. Traditional searches for deviations from the standard model structure of the weak …

The impact of new and highly precise neutron β decay data is reviewed. We focus on recent
results from neutron lifetime, β asymmetry, and electron–neutrino correlation experiments …

We analyze the sensitivity of all experimentally observable asymmetries and energy
distributions for the neutron β-decay with a polarized neutron and an unpolarized decay …

Precision measurements in nuclear β decay provide sensitive means to test the structure of
the standard electroweak model; they also allow the determination of fundamental …

The standard model predicts that, in addition to a proton, an electron, and an antineutrino, a
continuous spectrum of photons is emitted in the β decay of the free neutron. We report on …

We present a detailed report of a measurement of the neutron β-asymmetry parameter A 0,
the parity-violating angular correlation between the neutron spin and the decay electron …