Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will
be the world's brightest neutron source. As such, it has the potential for a particle physics …

A simple way to accommodate dark matter is to postulate the existence of a hidden sector.
That is, a set of new particles and forces interacting with the known particles predominantly …

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 …

The observation of neutrons turning into antineutrons would constitute a discovery of
fundamental importance for particle physics and cosmology. Observing the n–n ̄ transition …

The violation of baryon number, $\mathcal {B} $, is an essential ingredient for the
preferential creation of matter over antimatter needed to account for the observed baryon …

Standard Model, with its present precision, predicts the neutron β β-decay time τ _ SM=
878.7 ± 0.6 τ SM= 878.7±0.6 s which is perfectly compatible with the neutron lifetime …

The neutron lifetime anomaly has been used to motivate the introduction of new physics with
hidden-sector particles coupled to baryon number, and on which neutron stars provide …

Mirror sectors have been proposed to address the problems of dark matter, baryogenesis,
and the neutron lifetime anomaly. In this work we study a new, powerful probe of mirror …

An unexplained> 4 σ discrepancy persists between “beam” and “bottle” measurements of
the neutron lifetime. A new model proposed that conversions of neutrons n into mirror …

It has been proposed that there could be a mirror copy of the standard model particles,
restoring the parity symmetry in the weak interaction on the global level. Oscillations …