The Lightest Pseudo-Goldstone Boson at Future e+e- Colliders

TL;DR

This paper explores the potential for discovering a very light pseudo-Goldstone boson, predicted by certain dynamical symmetry breaking models, at future electron-positron and gamma-gamma colliders, providing a new avenue to test these theories.

Contribution

It analyzes the prospects for detecting the lightest pseudo-Goldstone boson in future collider experiments, linking theoretical models with experimental search strategies.

Findings

The P0 boson is likely to be light due to its mass scale being tied to the b-quark.

Future colliders could effectively search for the P0, testing dynamical symmetry breaking models.

The presence of P0 offers a new experimental signature for dynamical electroweak symmetry breaking.

Abstract

In a class of models of dynamical symmetry breaking not ruled out by the available data, the lightest neutral pseudo-Nambu-Goldstone boson P0 contains only down-type techniquarks and charged technileptons. Its mass scale is naturally determined by the b-quark and therefore it is likely to be light. As the presence of pseudo-Nambu-Goldstone bosons in models of dynamical symmetry breaking is a quite general feature, the search of the P0 at colliders is an interesting opportunity of putting limits on or discovering a dynamical electroweak symmetry breaking scenario. In this note we discuss the prospects for discovering and studying the P0 at future e+e- and gamma-gamma colliders.