Signatures of dynamical scalars

TL;DR

This paper discusses how effective Lagrangians can distinguish between different high-energy electroweak symmetry breaking scenarios, offering insights into the Higgs boson's nature through low-energy signals.

Contribution

It compares linear and non-linear effective Lagrangians, highlighting their distinct phenomenological signatures relevant for understanding the Higgs boson.

Findings

Different effective descriptions lead to unique low-energy signals.

Phenomenological differences help identify the nature of electroweak symmetry breaking.

Insights into the Higgs boson are gained through these effective Lagrangian signals.

Abstract

Effective Lagrangians represent an important, model independent tool for studying physics beyond the Standard Model, via its impact on electroweak scale observables. In particular, two different effective descriptions may be appropriate, depending on how the electroweak symmetry breaking is realized at high energies: a linear effective Lagrangian is best suited in presence of linear dynamics, while a non-linear -chiral- one is more pertinent for scenarios featuring a non-linear realization. In this talk I will present a few examples of low-energy signals that differentiate the phenomenology of the two descriptions, thus providing a powerful insight into the nature of the Higgs boson.