Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 84: Theorie: BSM II

T 84.1: Talk

Thursday, March 22, 2018, 16:30–16:45, Z6 - SR 1.010

Automatic calculations of effective Lagrangians in the path integral approach — Michael Kraemer, Alexander Voigt, and •Benjamin Summ — RWTH Aachen University, Aachen, Germany

Effective field theory (EFT) has become a major tool for studying extensions of the Standard Model. Unfortunately, the EFT approach requires the calculation of the effective action and higher dimensional operators, which in general is a model dependent task. Recently, a method based on the path integral formalism was introduced, which at one-loop reduces this calculation to transformations of the original Lagrangian and insertion into a master formula. We present this method and extend it to include the treatment of epsilon scalars, which become important when switching from a supersymmetric theory to an EFT without supersymmetry. We further discuss the possibility of automatizing the calculation of the effective action based on this method.