Strong Electroweak Symmetry Breaking and Spin 0 Resonances

TL;DR

This paper discusses the prediction of new spin 0 resonances at the TeV scale in strong electroweak symmetry breaking theories, which could be detected at the LHC through their decays to top quarks and multiple W/Z bosons.

Contribution

It identifies the likely existence of narrow spin 0 resonances in strong electroweak breaking models and their potential signatures at the LHC.

Findings

Predicts new spin 0 states at TeV scale coupled to third generation quarks.

Suggests these states can be produced via gluon-gluon or gluon-bottom fusion.

Resonances decay into top pairs or top-bottom pairs, with multiple W/Z bosons.

Abstract

We argue that theories of strong electroweak symmetry breaking sector necessarily contain new spin 0 states at the TeV scale in the tbar-t and tbar-b/bbar-t channels, even if the third generation quarks are not composite at the TeV scale. These states couple sufficiently strongly to third generation quarks to have significant production at LHC via gg \to X or gb \to X. The existence of narrow resonances in QCD suggests that the strong electroweak breaking sector contains narrow resonances that decay to tbar-t or tbar-b/bbar-t, with significant branching fractions to 3 or more longitudinal W and Z bosons. These may give new "smoking gun" signals of strong electroweak symmetry breaking.