Neutron lifetime measurements using gravitationally trapped ultracold neutrons

Preprint

26 July 2007

preprint
Published by arXiv in arXiv

Abstract

Experiment using gravitationally trapped ultracold neutrons (UCNs) to measure the neutron lifetime is reviewed. The precise value of the neutron lifetime is of fundamental importance to particle physics and cosmology. In our experiment, the UCN storage time is brought closest ever to the neutron lifetime: the probability of the UCN loss from the trap was only 1% of that for neutron beta-decay. The neutron lifetime obtained, 878.5+/-0.7stat+/-0.3sys s, is the most accurate one to date.

Keywords

GRAVITATIONALLY TRAPPED
USING GRAVITATIONALLY
ULTRACOLD NEUTRONS
TRAPPED ULTRACOLD
NEUTRON LIFETIME
UCN

All Related Versions

Version 1, 2007-02-06, ArXiv
Version 2, 2007-07-26, ArXiv
Version 3, 2009-02-02, ArXiv
Published version: Physical Review C, 78 (3), 035505.

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