期刊
PHYSICS LETTERS B
卷 605, 期 1-2, 页码 72-78出版社
ELSEVIER
DOI: 10.1016/j.physletb.2004.11.013
关键词
ultracold neutrons; neutron lifetime
We present a new value for the neutron lifetime of 878.5 +/- 0.7(stat) +/- 0.3(syst). This result differs from the world average value (885.7 +/- 0.8 s) by 6.5 standard deviations and by 5.6 standard deviations from the previous most precise result [Phys. Lett. B 483 (2000) 15]. However, this new value for the neutron lifetime together with a beta-asymmetry in neutron decay, A(0), of -0.1189(7) [Phys. Rev. Lett. 88 (2002) 211801] is in a good agreement with the Standard Model. (C) 2004 Elsevier B.V. All rights reserved.
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