neutron lifetime anomaly and test of mirror neutron oscillations*

The neutron lifetime puzzle has been an evolving and complicated issue since high precision lifetime measurements began in the late 1980s. Probably the most notably anomaly is the 1% discrepancy between two sets of high precision measurements via the so-called "beam" and "bottle" approaches. Also related is the puzzle about the CKM unitarity. One of the possible explanations for such puzzles is from the newly proposed mirror matter model via ordinary-mirror neutron oscillations. Here we propose a set of feasible laboratory experiments to test concrete unique predictions of the mirror oscillation model, including measurement of neutron lifetime anomalies in narrow magnetic traps or under super-strong magnetic fields, and detection of unexpectedly large branching fractions of invisible decays of long-lived neutral hadrons. Their impact and implication on new physics beyond the Standard Model will be discussed.