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Uspekhi Fizicheskikh Nauk, 2019, Volume 189, Number 6, Pages 635–641
DOI: https://doi.org/10.3367/UFNr.2018.11.038475 (Mi ufn6289) 		 
This article is cited in 10 scientific papers (total in 10 papers)

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Disagreement between measurements of the neutron lifetime by the ultracold neutron storage method and the beam technique

A. P. Serebrov

National Research Center "Kurchatov Institute", Konstantinov Petersburg Nuclear Physics Institute
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DOI: https://doi.org/10.3367/UFNr.2018.11.038475
Abstract: Recent measurements of the neutron lifetime performed using a gravitational trap of ultracold neutrons (UCNs) (Konstantinov Petersburg Nuclear Physics Institute, Russia) and a magnetic UCN trap (LANL, USA) have confirmed PNPI's result of 2005. The results of experiments with stored UCNs agree with each other but differ from those of the beam experiment (NIST, USA) by ${3.5}\sigma $ (corresponding to 1% in the decay probability). This disagreement is currently being discussed in the literature as a ‘neutron anomaly’. We analyze possible reasons for that disagreement and test the experimental data for the neutron lifetime and beta-decay asymmetry within the Standard Model. The test is only passed for neutron lifetime values that are obtained using the UCN storage method.
Funding agency Grant number
Russian Science Foundation 14-22-00105
This work was performed within the framework of a grant from the Russian Science Foundation (no. 14-22-00105).
Received: April 13, 2018
Revised: November 2, 2018
Accepted: November 15, 2018
English version:
Physics–Uspekhi, 2019, Volume 62, Issue 6, Pages 596–601
DOI: https://doi.org/10.3367/UFNe.2018.11.038475
Bibliographic databases:
Document Type: Article
PACS: 06.20.-f, 12.60.-i, 14.20.Dh
Language: Russian
Citation: A. P. Serebrov, “Disagreement between measurements of the neutron lifetime by the ultracold neutron storage method and the beam technique”, UFN, 189:6 (2019), 635–641; Phys. Usp., 62:6 (2019), 596–601
Citation in format AMSBIB
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    • This publication is cited in the following 10 articles:
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