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

页码：72 / 78

页数：7

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