A Pseudoscalar Resonance That Could Resemble the Higgs

TL;DR

This paper proposes a novel dynamical model where a pseudoscalar resonance, not the Higgs, explains electroweak symmetry breaking and particle masses, with potential observable signals at colliders.

Contribution

It introduces a new SU(5) gauge theory framework with bound states like the $ ext{eta}_6$ and $ ext{eta}_3$, offering an alternative to the Higgs mechanism and explaining collider phenomena.

Findings

The $ ext{eta}_6$ resonance may explain LHC and Tevatron Z pair cross-sections.

The $ ext{eta}_3$ resonance contains a $tar{t}$ pair and mixes with $ ext{eta}_6$.

Predicted decay patterns could match experimental results better than the Standard Model Higgs.

Abstract

As described previously, in SU(5) gauge theory with massless left-handed $ {\bf 5 \oplus 15 \oplus 40 \oplus 45^*}$ fermions \{QUD\}, an S-Matrix is produced by infra-red anomaly dynamics that might provide an extraordinarily economic origin and unification for the Standard Model. All particles are bound-states, with dynamically generated masses, and there is no Higgs sector. In this paper, the radically different dynamical role played by the top quark is elaborated. It does not reproduce Standard Model "$ t\bar{t} $" events but, instead, these events are reproduced by the multiple vector boson decays of the $\eta_6$ - the remnant pseudoscalar resonance left by color sextet electroweak symmetry breaking. Evidence that the $\eta_6$ appears in LHC and Tevatron Z pair cross-sections is discussed. A second pseudoscalar resonance, the $\eta_3$, contains a $t\bar{t}$ pair and mixes with the $\eta_6$ via the pomeron. The mixing should give the $\eta_3$ a mass between the triplet and sextet scales. It could also have a decay mode pattern that is more consistent with LHC and Tevatron results than the (mass spectrum determined) pattern of the Standard Model Higgs boson that many hope has been discovered. Unfortunately, at present, there is no possibility to calculate explicit cross-sections.