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physics.atom-ph2026
Precision Spectroscopy of 2S-nS Transitions in Atomic Hydrogen: A Determination of the Proton Charge Radius
R. G. Bullis, W. L. Tavis, M. R. Weiss +4
We present absolute frequency measurements of 2S_{1/2}-nS_{1/2} two-photon transitions with n = 8, 9, and 10 in a cryogenic beam of atomic hydrogen. Each transition has been measur…
physics.atom-ph2023
Precision Rydberg State Spectroscopy with Slow Electrons and Proton Radius Puzzle
Ulrich D. Jentschura, Dylan C. Yost
The so-called proton radius puzzle (the current discrepancy of proton radii determined from spectroscopic measurements in ordinary versus muonic hydrogen) could be addressed via an…