中子永久电偶极矩的测量。
Measurement of the Permanent Electric Dipole Moment of the Neutron.
作者信息
Abel C, Afach S, Ayres N J, Baker C A, Ban G, Bison G, Bodek K, Bondar V, Burghoff M, Chanel E, Chowdhuri Z, Chiu P-J, Clement B, Crawford C B, Daum M, Emmenegger S, Ferraris-Bouchez L, Fertl M, Flaux P, Franke B, Fratangelo A, Geltenbort P, Green K, Griffith W C, van der Grinten M, Grujić Z D, Harris P G, Hayen L, Heil W, Henneck R, Hélaine V, Hild N, Hodge Z, Horras M, Iaydjiev P, Ivanov S N, Kasprzak M, Kermaidic Y, Kirch K, Knecht A, Knowles P, Koch H-C, Koss P A, Komposch S, Kozela A, Kraft A, Krempel J, Kuźniak M, Lauss B, Lefort T, Lemière Y, Leredde A, Mohanmurthy P, Mtchedlishvili A, Musgrave M, Naviliat-Cuncic O, Pais D, Piegsa F M, Pierre E, Pignol G, Plonka-Spehr C, Prashanth P N, Quéméner G, Rawlik M, Rebreyend D, Rienäcker I, Ries D, Roccia S, Rogel G, Rozpedzik D, Schnabel A, Schmidt-Wellenburg P, Severijns N, Shiers D, Tavakoli Dinani R, Thorne J A, Virot R, Voigt J, Weis A, Wursten E, Wyszynski G, Zejma J, Zenner J, Zsigmond G
机构信息
Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom.
Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
出版信息
Phys Rev Lett. 2020 Feb 28;124(8):081803. doi: 10.1103/PhysRevLett.124.081803.
We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons. Our measurement stands in the long history of EDM experiments probing physics violating time-reversal invariance. The salient features of this experiment were the use of a ^{199}Hg comagnetometer and an array of optically pumped cesium vapor magnetometers to cancel and correct for magnetic-field changes. The statistical analysis was performed on blinded datasets by two separate groups, while the estimation of systematic effects profited from an unprecedented knowledge of the magnetic field. The measured value of the neutron EDM is d_{n}=(0.0±1.1_{stat}±0.2_{sys})×10^{-26} e.cm.
我们展示了在保罗·谢尔研究所利用超冷中子通过分离振荡磁场的拉姆齐方法测量中子电偶极矩（EDM）的实验结果。我们的测量处于探索违反时间反演不变性物理的EDM实验的悠久历史之中。该实验的显著特点是使用了一个¹⁹⁹Hg共磁强计和一组光泵浦铯蒸汽磁强计来抵消和校正磁场变化。统计分析由两个独立的小组对盲数据集进行，而系统效应的估计得益于对磁场前所未有的了解。测得的中子EDM值为dn =(0.0±1.1统计±0.2系统)×10⁻²⁶ e·cm。
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