3–5 Dec 2024
Mainz Institute for Theoretical Physics, Johannes Gutenberg University
Europe/Berlin timezone

Two-Loop Dimension-Six Effective Action: Integrating Out Heavy Scalar(s)

4 Dec 2024, 12:15
30m
Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Virtual Workshop

Speaker

Debmalya Dey (Indian Institute of Technology Kanpur)

Description

We have, for the first time, computed a model-independent two-loop dimension-six effective action by integrating out heavy scalars. As an example, we applied this to the electroweak complex triplet scalar and the 2HDM model. In this talk, I will discuss our approach to computing the two-loop effective action using the Heat-Kernel method, which simplifies the process by avoiding extensive Feynman diagrams and complex momentum integrals. Our approach applies to any theory with a second-order elliptic operator, enabling us to compute quantum corrections from Heat Kernel Coefficients (HKCs). This method yields universal results for models with scalar and fermion fields, making it a powerful tool for applications such as the Standard Model Effective Field Theory (SMEFT).

Presentation materials