Low Mass Higgs Boson Consistent with Precision Experiments: A Consequence of Large Top-Yukawa Coupling in Condensate Models

TL;DR

This paper demonstrates that a large top-Yukawa coupling in condensate models can produce a low-mass Higgs boson consistent with experimental data, suggesting a composite Higgs scenario with distinct scales for mass generation.

Contribution

It introduces a dispersion relation approach showing how a large top-Yukawa coupling reduces the Higgs mass in condensate models, aligning with precision measurements.

Findings

Higgs mass lowered to 100-200 GeV

Top-Yukawa coupling found to be ~3.7

Emergence of a second scalar near 1 TeV

Abstract

It is shown, using dispersion relations techniques for bound states, that the presence of a large top-Yukawa coupling lowers the Higgs mass from the condensate-model value of twice the top mass (~350 Gev) to 100-200 Gev consistent with the Z(super 0) width precision measurements. The coupling is found to be ~3.7 at the top-mass, much larger than the Standard Model value ~1. It corresponds to a compositeness scale ~1.4 Tev, which is consistent with top-color models, and implies quite different scales for fermion mass generation and electroweak symmetry breaking. A second scalar state around 1 Tev also emerges as a solution in combination with the low mass Higgs.