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Zhong, Weicheng
in Cooperation with on an Cooperation-Score of 37%
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article
Measurement of the fine-structure constant as a test of the Standard Model
Abstract
<jats:title>Refining the fine-structure constant</jats:title><jats:p>The fine-structure constant, α, is a dimensionless constant that characterizes the strength of the electromagnetic interaction between charged elementary particles. Related by four fundamental constants, a precise determination of α allows for a test of the Standard Model of particle physics. Parker<jats:italic>et al.</jats:italic>used matter-wave interferometry with a cloud of cesium atoms to make the most accurate measurement of α to date. Determining the value of α to an accuracy of better than 1 part per billion provides an independent method for testing the accuracy of quantum electrodynamics and the Standard Model. It may also enable searches of the so-called “dark sector” for explanations of dark matter.</jats:p><jats:p><jats:italic>Science</jats:italic>, this issue p.<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6385" page="191" related-article-type="in-this-issue" vol="360" xlink:href="10.1126/science.aap7706">191</jats:related-article></jats:p>