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The proton radius puzzle

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arxiv 1706.00696 v2 pith:D44KG6KY submitted 2017-06-02 physics.atom-ph

The proton radius puzzle

classification physics.atom-ph
keywords protonradiusspectroscopyhydrogenmuonicobtainedpuzzlecomplemented
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-proton scattering and hydrogen spectroscopy. The status of this discrepancy, which is known as the proton radius puzzle will be discussed in this paper, complemented with the new insights obtained from spectroscopy of muonic deuterium.

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