Atom‐Interferometry Measurement of the Fine Structure Constant
Atom‐Interferometry Measurement of the Fine Structure Constant
复制标题
精细结构常数的原子干涉测量
DOI:
10.1002/andp.201800346
复制
发表时间:
2019
影响因子:
2.4
通讯作者:
Müller, Holger
中科院分区:
文献类型:
--
作者:
Yu, Chenghui;Zhong, Weicheng;Estey, Brian;Kwan, Joyce;Parker, Richard H.;Müller, Holger
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:
A. Jeffrey;R. Elmquist;L. H. Lee;J. Q. Shields;R. Dziuba
通讯作者:
R. Dziuba
影响因子:
64.8
作者:
Sturm, S.;Koehler, F.;Blaum, K.
通讯作者:
Blaum, K.
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
E Krüger;W Nistler;W Weirauch
通讯作者:
W Weirauch