QUANTUM ELECTRODYNAMICS Hyperfine puzzle?

Karr, JP

Karr, JP (reprint author), UPMC, Sorbonne Univ, PSL Res Univ, Coll France,CNRS,ENS,Lab Kastler Brossel, 4 Pl Jussieu, F-75005 Paris, France.; Karr, JP (reprint author), Univ Evry Val Essonne, Blvd Francois Mitterrand, F-91000 Evry, France.

NATURE PHYSICS, 2017; 13 (6): 533