Abstract
This paper extends an earlier one describing the Higgs boson H as a light composite scalar in a strong extended technicolor model of electroweak symmetry breaking. The Higgs mass MH is made much smaller than ΛETC by tuning the ETC coupling very close to the critical value for electroweak symmetry breaking. The technicolor interaction, neglected in the earlier paper, is considered here. Its weakness relative to extended technicolor is essential to understanding the lightness of H compared to the low-lying spin-one technihadrons. Technicolor cannot be completely ignored, but implementing technigluon exchange together with strong extended technicolor appears difficult. We propose a solution that turns out to leave the results of the earlier paper essentially unchanged. An argument is then presented that masses of the spin-one technifermion bound states, ρH and aH, are much larger than MH and, plausibly, controlled by technicolor. Assuming MρH and MaH are in the TeV-energy region, we identify ρH and aH with the diboson excesses observed near 2 TeV by ATLAS and CMS in LHC Run 1 data, and we discuss their phenomenology for Runs 2 and 3.
Highlights
JHEP06(2017)140 right-handed singlets under (SU(2) ⊗ U(1))EW
This paper extends an earlier one describing the Higgs boson H as a light composite scalar in a strong extended technicolor model of electroweak symmetry breaking
Assuming MρH and MaH are in the TeV-energy region, we identify ρH and aH with the diboson excesses observed near 2 TeV by ATLAS and CMS in LHC Run 1 data, and we discuss their phenomenology for Runs 2 and 3
Summary
In ref. [16], the Higgs and Goldstone bosons were seen as poles in the fermion-antifermion scattering amplitudes calculated in the large-N , weak-TC limit. (Had αTC(Λ) been large, the transition from small to large Σ would have been gradual and there could be no large separation between H and ρH masses.) The critical λαTC is smaller than one because, to a good approximation, TC produces an interaction in the spin-zero channels of the same form and sign as the G3-term in LETC. Since LETC is the interaction determining the Higgs and Goldstone poles and their couplings to fermions in the large-N limit, the results reviewed in section 1 are unchanged To see this in detail, we use the fact that the TC coupling involved in the EW phase transition is approximately αTC(Λ). The chiral current Dγμγ5D has a TC-anomalous divergence and explicit breaking of this symmetry is O(ΛTC)
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