Testing Little Higgs Mechanism at Future Colliders

TL;DR

This paper explores how future electron-positron colliders can precisely test the little Higgs mechanism, especially in the top sector, by measuring top partner couplings through Higgs-associated and threshold production methods.

Contribution

It introduces a method to test the little Higgs mechanism at future colliders focusing on the top sector using effective Lagrangian techniques.

Findings

Higgs-associated production enables precise testing at high energies.

Threshold production allows testing at lower energies.

The mechanism can be effectively tested with planned collider capabilities.

Abstract

In the framework of the little higgs scenario, coupling constants of several interactions are related to each other to guarantee the stability of the higgs boson mass at one-loop level. This relation is called the little higgs mechanism. We discuss how accurately the relation can be tested at future e+e- colliders, with especially focusing on the top sector of the scenario using a method of effective lagrangian. In order to test the mechanism at the top sector, it is important to measure the Yukawa coupling of the top partner. We consider higgs associated production and threshold production of the top partner, and find that the mechanism can be tested precisely using the associate production when the center of mass energy is large enough. The threshold production also allows us to test it even if the center mass energy is not so large.