Transverse Vector Vertex Function and Transverse Ward-Takahashi Relations in QED |
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Authors: | HE Han-Xin |
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Affiliation: | China Institute of Atomic Energy, P.O. Box 275(18), Beijing 102413, China;Institute of Theoretical Physics, the Chinese Academy ofSciences, Beijing 100080, China |
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Abstract: | The transverse vector vertex function in momentum space in four-dimensional QED is derived in terms of a set of transverse Ward-Takahashi relations for the vector and the axial-vector vertices in the case of massless fermion. It is demonstrated explicitly that the transverse vector vertex function derived this way to one-loop order leads to the same result as one obtained in perturbation theory. This provides a basic approach to determine the transverse part of basic vertex function from the symmetry relations of the system. |
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Keywords: | transverse vertex function transverse Ward-Takahashi relations |
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