The relativistic hydrogen atom : a theoretical laboratory for structure functions ∗


Thanks to the Dirac equation, the hydrogen-like atom at high Z offers a precise model of relativistic bound state, allowing to test properties of un-polarized and polarized structure functions analogous to the hadronic ones, in particular: Sivers effect, sum rules for the vector, axial, tensor charges and for the magnetic moment, positivity constraints, sea… (More)


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