Journal
PHYSICS LETTERS B
Volume 791, Issue -, Pages 6-10Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2019.02.013
Keywords
Neutron; Beta decay; Lifetime; Beta asymmetry; Dark neutron decay
Funding
- German Research Foundation (DFG) [SPP 1491]
- Austrian Science Fund (FWF) [4944/1-2]
- [P 26636-N20]
- Austrian Science Fund (FWF) [P26636] Funding Source: Austrian Science Fund (FWF)
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Since long neutron lifetimes measured with a beam of cold neutrons are significantly different from lifetimes measured with ultracold neutrons bottled in a trap. It is often speculated that this neutron anomaly is due to an exotic dark neutron decay channel of unknown origin. We show that this explanation of the neutron anomaly can be excluded with a high level of confidence when use is made of our new result for the neutron decay beta asymmetry. Furthermore, data from neutron decay now compare well with Ft-data derived from nuclear beta decays. (c) 2019 The Author(s). Published by Elsevier B.V.
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