Measurement of the neutron lifetime using a gravitational trap and a low-temperature Fomblin coating

被引：252
|
作者：
Serebrov, A
Varlamov, V
Kharitonov, A
Fomin, A
Pokotilovski, Y
Geltenbort, P
Butterworth, J
Krasnoschekova, I
Lasakov, M
Tal'daev, R
Vassiljev, A
Zherebtsov, O
机构：
[1] Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188300, Russia
[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
来源：
PHYSICS LETTERS B | 2005年 / 605卷 / 1-2期
基金：
俄罗斯基础研究基金会;
关键词：
ultracold neutrons; neutron lifetime;
D O I：
10.1016/j.physletb.2004.11.013
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：72 / 78
页数：7
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