High Energy Physics Seminar

Using the geometric approach, the formula by 't Hooft for the one-loop counterterms of scalar theories has recently been extended to theories with higher derivative operators. In this work, we extend the geometric formalism to two loops. We find a formula for two-loop counterterms, generalizing the well-known one-loop result of 't Hoof. We also find that a large class of diagrams do not contribute to the two-loop anomalous dimensions.

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