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Submission + - Scientists Calculate Most Precise Measurement of Electron's Mass (sciencemag.org)

sciencehabit writes: Ateam of physicists has produced the most precise electron mass measurement ever made. Instead of trying to measure the mass directly, the researchers bound a single electron to a bare carbon nucleus and placed the resulting atom in a uniform electromagnetic field called a Penning trap. The team's new measurement is 13 times more precise than previous efforts, with an uncertainty of just 0.03 parts per billion. The group’s precise result will help physicists more accurately calculate the fine-structure constant, an important value in tests of the standard model of particle physics, which shapes our understanding of the basic building blocks of the universe.
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Scientists Calculate Most Precise Measurement of Electron's Mass

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