Effective field theories and pseudo-observables in the quest for physics beyond the Standard Model

TL;DR

This paper explores the use of effective field theories and pseudo-observables as tools to search for new physics beyond the Standard Model, focusing on Higgs couplings and higher-dimensional operators.

Contribution

It introduces a generalized framework extending the kappa approach using effective field theory with dimension 6 operators and discusses NLO amplitude calculations and experimental strategies.

Findings

Incorporation of dimension 6 operators into the SM Lagrangian.

Methodology for NLO amplitude analysis of the extended model.

Discussion of experimental approaches to detect new physics.

Abstract

We discuss briefly the kappa framework, proposed originally as a test for the Higgs couplings of the Standard Model (SM). Further, we discuss a generalization of this idea in terms of effective field theory. We sketch how to add dimension 6 operators to the SM Lagrangian and the renormalization process. Finally we show how to study the amplitudes of the resulting model at next-to-leading order and discuss possible experimental approaches.