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- W2943069478 abstract "The fermion self-energy is calculated from the rainbow-ladder truncation of the Dyson-Schwinger equation (DSE) in quantum electrodynamics (QED) for spacelike momenta and in the complex momentum plane close to the timelike region, both using Pauli-Villars regularization. Specifically, the DSE is solved in the complex momentum plane by rotating either the energy component of the four-momentum or the magnitude of Euclidean four-momentum to reach the timelike region in Minkowski space. The coupling constant is appropriately chosen to ensure the singularities of the fermion propagator are located in the timelike region while producing significant differences from the perturbative solutions. For simplicity, we choose Feynman gauge, but the method is applicable in other covariant gauges as well. We demonstrate that the approximate spectral representation based on the fermion self-energy near the timelike region is consistent with the solution of the DSE directly in the Euclidean space." @default.
- W2943069478 created "2019-05-09" @default.
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- W2943069478 date "2019-05-01" @default.
- W2943069478 modified "2023-09-27" @default.
- W2943069478 title "Towards Minkowski space solutions of Dyson-Schwinger Equations through un-Wick rotation" @default.
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