Speaker
Prof.
Michael Eides
(University of Kentucky)
Description
Energy levels of QED bound states, which depend on a number of independent mass parameters, can be calculated as matrix elements of the QED energy-momentum trace. As an example of such system we consider muonic hydrogen. The leading one-loop corrections to its energy levels depend on the electron and muon masses. These corrections are calculated as matrix elements of the energy-momentum trace. Respective one-loop trace diagrams are different from the standard Lamb shift
diagrams. We explain analytically and diagrammatically why two different sets of diagrams lead to the same results. Similar relationships should also hold beyond the one-loop approximation.
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Author
Prof.
Michael Eides
(University of Kentucky)
Co-author
Prof.
Vladimir Yerokhin
(Max Planck Institute for Nuclear Physics)