通知公告
Analytic structure, renormalization and gauge covariance of the Schwinger-Dyson equations for QED propagator
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報(bào)告題目：Analytic structure, renormalization and gauge covariance of the Schwinger-Dyson equations for QED propagator
報(bào)告人：Dr. Shaoyang Jia
College of William and Mar
時(shí)間安排：2017年8月10日15:00
地點(diǎn)：近代物理所5號(hào)樓1006會(huì)議室
報(bào)告摘要:
The spectral representation of the QED fermion propagator is closely related to the analytic structure of the propagator as functions on the com- plex momentum plane. When combined with the Ward-Green-Takahashi identity, such a representation allows the propagator Schwinger-Dyson equations to be solved directly in Minkowski space with on-shell renor- malization conditions. We further discuss truncations of the Schwinger- Dyson equations for the QED two-point functions to maintain analytic structures, loop-renormalizability conditions, and gauge covariances.
