Abstract
One loop calculations in gauge theories in arbitrary gauge and dimensions become exceedingly hard with growing number of external off‐shell legs. Let alone higher point functions, such a calculation for even the three point one‐loop vertices for quantum electrodynamics (QED) and quantum chromodynamics (QCD) has been made available only recently. In this article, we discuss how Ward‐Fradkin‐Green‐Takahashi identities (WFGTI) may provide a helpful tool in these computations. After providing a glimpse of our suggestion for the case of the 3‐point vertex, we present our preliminary findings towards our similar efforts for the 4‐point function. We restrict ourselves to the example of scalar quantum electrodynamics (SQED).
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