Imprints of Composite Higgs Models at e+e- Colliders

TL;DR

This paper explores how future electron-positron colliders can detect signs of composite Higgs models through precise measurements of Higgs and top-quark properties, focusing on deviations from Standard Model predictions.

Contribution

It provides a detailed analysis of the potential to observe composite Higgs signatures at e+e- colliders, emphasizing top-quark physics and Higgs property deviations within a specific 4D composite Higgs model.

Findings

Potential deviations in cross-section and asymmetry observables indicate new physics.

Future colliders can significantly test composite Higgs scenarios.

Top-quark measurements are crucial for probing new physics.

Abstract

We test the sensitivity of a future e+e- collider to composite Higgs scenarios encompassing partial compositeness. Besides the detailed study of the Higgs properties, such a machine will have a rich top-quark physics programme mainly in two domains: top property accurate determination at the $t \bar t$ production threshold and search for New Physics with top quarks above it. In both domains, a composite Higgs scenario can manifest itself via sizable deviations in both cross-section and asymmetry observables. Herein we discuss such a possibility using a particular realisation, namely the 4-Dimensional Composite Higgs Model.