Atom‐Interferometry Measurement of the Fine Structure Constant

Atom‐Interferometry Measurement of the Fine Structure Constant
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精细结构常数的原子干涉测量

DOI:
10.1002/andp.201800346
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发表时间:
2019
期刊:
影响因子:
2.4
通讯作者:
Müller, Holger
Müller, Holger
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yu, Chenghui;Zhong, Weicheng;Estey, Brian;Kwan, Joyce;Parker, Richard H.;Müller, Holger

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使用原子干干仪测量还原普朗克常数和铯133原子质量的商,记录了精细结构常数的最精确测量,精度为十亿分之0.20 (ppb)。利用多光子相互作用(Bragg衍射和Bloch振荡),任何ramsey - bord<s:1>干涉仪的最大相位(1200万弧度)和控制系统效应在0.12 ppb的水平被证明。将Penning陷阱测量结果与基于α测量的电子回旋磁矩异常的标准模型预测进行比较,观察到2.5张力,根据频率统计,在99%的置信度水平上拒绝暗光子作为μ子回旋磁矩差异的原因。暗扇区候选者(例如,标量和伪标量玻色子,矢量玻色子和轴矢量玻色子)的含义可能是超出标准模型的物理标志。本文还提出了今后对铯喷泉原子干涉仪进行升级,使其精度提高1 ~ 2个数量级,这将有助于解决紧张的问题。
Using an atom interferometer to measure the quotient of the reduced Planck's constant and the mass of a cesium‐133 atom, the most accurate measurement of the fine structure constantis recorded, at an accuracy of 0.20 parts per billion (ppb). Using multiphoton interactions (Bragg diffraction and Bloch oscillations), the largest phase (12 million radians) of any Ramsey–Bordé interferometer and controlled systematic effects at a level of 0.12 ppb are demonstrated. Comparing the Penning trap measurements with the Standard Model prediction of the electron gyromagnetic anomalybased on the α measurement, a 2.5tension is observed, rejecting dark photons as the reason for the unexplained part of the muon's gyromagnetic moment discrepancy at a 99% confidence level according to frequentist statistics. Implications for dark‐sector candidates (e.g., scalar and pseudoscalar bosons, vector bosons, and axial‐vector bosons) may be a sign of physics beyond the Standard Model. A future upgrade of the cesium fountain atom interferometer is also proposed to increase the accuracy ofby 1 to 2 orders of magnitude, which would help resolve the tension.
DOI: --
发表时间: 1996
期刊: Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements
影响因子: --
作者:
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发表时间: 2014-02-27
期刊: NATURE
影响因子: 64.8
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DOI: --
发表时间: 1998
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