Abstract
We report on the precise measurement of the atomic mass of a single proton with a purpose-built Penning-trap system. With a precision of 32 parts per trillion our result not only improves on the current CODATA literature value by a factor of 3, but also disagrees with it at a level of about 3 standard deviations.
- Received 4 June 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.033001
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Proton Loses Weight
Published 18 July 2017
The most precise measurement to date of the proton mass finds a value that is 3 standard deviations lower than previous estimates.
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