An Effective Guide to Beyond the Standard Model Physics

TL;DR

This paper presents a systematic way to construct a basis of effective operators for Beyond Standard Model physics, making experimental correlations transparent and aiding future searches.

Contribution

It introduces a basis of dimension-six operators with a one-to-one correspondence to measurable couplings, enhancing interpretability of BSM effects.

Findings

Clear identification of correlations among measurable quantities.

Framework simplifies the analysis of Higgs and electroweak data.

Facilitates targeted searches for new physics.

Abstract

Effective Lagrangians with dimension-six operators are widely used to analyse Higgs and other electroweak data. We show how to build a basis of operators such that each operator corresponds to a coupling which is well measured or will be in the future. We choose a set of couplings such that the correspondence is one-to-one. In our framework, some important features of the Lagrangian are transparent. For example, one can clearly see the presence or absence of correlations among measurable quantities. This may be a useful guide when searching for physics beyond the Standard Model.