High-Precision Measurement of the Proton's Atomic Mass

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High-Precision Measurement of the Proton's Atomic Mass

Heiße, F; Köhler-Langes, F; Rau, S; Hou, J; Junck, S; Kracke, A; Mooser, A; Quint, W; Ulmer, S; Werth, G; Blaum, K; Sturm, S

Physical review letters, 07/2017, Volume: 119, Issue: 3

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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.

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