A new Higgs effective field theory and the new no-lose theorem

TL;DR

This paper introduces a novel effective field theory that accurately captures non-decoupling effects of heavy particles, enabling better predictions of Higgs coupling deviations and informing future collider experiments.

Contribution

It proposes a new EFT framework that correctly describes non-decoupling quantum effects of heavy particles, improving upon standard EFT approaches.

Findings

The new EFT accounts for non-decoupling effects of heavy particles.

Vacuum stability and unitarity are analyzed within the new framework.

The scale of new physics can be estimated from Higgs coupling deviations.

Abstract

Non-decoupling effects of heavy new particles cannot be described by the standard effective field theory with finite truncation of higher dimensional operators. We propose a new effective field theory in which non-decoupling quantum effects of new physics are correctly described. We discuss vacuum stability and perturbative unitarity in our effective field theory, and we find that the scale of new physics can be estimated if we will observe the Higgs coupling deviation via non-decoupling effects in future collider experiments.