Erratum: Technipion limits from LHC Higgs searches [Phys. Rev. D<b>84</b>, 115025 (2011)]

When technicolor (TC), QCD, extended technicolor (ETC) and other interactions become coupled through their different Schwinger-Dyson equations, the solution of these equations are modified compared to those of the isolated equations. The change in the self-energies is similar to that obtained in the presence of four-fermion interactions, but without their ad hoc inclusion in the theory. In this case TC and QCD self-energies decrease logarithmically with the momenta, which allows us to build models where ETC boson masses can be pushed to very high energies, and their effects will barely appear at present energies. Here we present a detailed discussion of this class of TC models. We first review the Schwinger-Dyson TC and QCD coupled equations and explain the origin of the asymptotic self-energies. We develop the basic ideas of how viable TC models may be built along this line, where ordinary lepton masses are naturally lighter than quark masses. One specific unified TC model associated with a necessary horizontal (or family) symmetry is described. The values of scalar and pseudo-Goldstone boson masses in this class of models are also discussed, as well as the value of the trilinear scalar coupling, and the consistency of the models with the experimental constraints.

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“…V, we estimated pseudo-Goldstone masses and verified that they cannot yet be seen at the LHC according the analysis of Ref. [78].…”

Section: Discussionsupporting

confidence: 57%

“…Moreover, due to the choice of the horizontal symmetry quantum numbers the technipions will mainly couple to the third ordinary fermionic family, i.e., t and b quarks and the τ lepton, in such a way that may easily evade the limits found in Ref. [78] obtained from data on the SM Higgs boson decaying into γγ and τ + τ − .…”

Section: Technipion Massesmentioning

confidence: 96%

Technicolor models with coupled systems of Schwinger-Dyson equations

Doff

Natale

2019

Phys. Rev. D

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“…The typical MSSM scalar spectrum requires a light scalar, so the pseudo-scalar is rather heavy, or much lighter as in the NMSSM [21]. A techni-pion in techni-color models could be light [22], but the rest of the THDM is missing. In Ref.…”

Section: A Model Of the Inverted Thdmmentioning

confidence: 99%

Is the LHC observing the pseudoscalar state of a two-Higgs-doublet model?

Burdman¹,

Haluch²,

Matheus³

2012

Phys. Rev. D

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The ATLAS and CMS collaborations have recently shown data suggesting the presence of a Higgs boson in the vicinity of 125 GeV. We show that a two-Higgs doublet model spectrum, with the pseudo-scalar state being the lightest, could be responsible for the diphoton signal events. In this model, the other scalars are considerably heavier and are not excluded by the current LHC data. If this assumption is correct, future LHC data should show a strengthening of the γγ signal, while the signals in the ZZ ( * ) → 4 and W W ( * ) → 2 2ν channels should diminish and eventually disappear, due to the absence of diboson tree-level couplings of the CP-odd state. The heavier CP-even neutral scalars can now decay into channels involving the CP-odd light scalar which, together with their larger masses, allow them to avoid the existing bounds on Higgs searches. We suggest additional signals to confirm this scenario at the LHC, in the decay channels of the heavier scalars into AA and AZ. Finally, this inverted two-Higgs doublet spectrum is characteristic in models where fermion condensation leads to electroweak symmetry breaking. We show that in these theories it is possible to obtain the observed diphoton signal at or somewhat above of the prediction for the standard model Higgs for the typical values of the parameters predicted.

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“…The anomaly coefficients A V1V2 , arising from the strongly-interacting constituents, that determine the dijet and diphoton decays of η X are defined as [20] A…”

Section: A Four-fermion Operators (Etc)mentioning

confidence: 99%

Testing a dynamical origin of standard model fermion masses

2016

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We discuss a test of the Standard Model fermion mass origin in models of dynamical electroweak symmetry breaking. The couplings of composite pseudoscalar resonances to top quarks allow to distinguish high-scale Extended-Technicolor-type fermion mass generation from fermion partial compositeness and low-scale mass generation via an induced vacuum expectation value of a doublet coupled to the composite sector. These different possible origins of fermion masses are thus accessible via weak-scale physics searched for at the LHC.

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Erratum: Technipion limits from LHC Higgs searches [Phys. Rev. D84, 115025 (2011)]

Cited by 11 publications

References 5 publications

Technicolor models with coupled systems of Schwinger-Dyson equations

Technicolor models with coupled systems of Schwinger-Dyson equations

Is the LHC observing the pseudoscalar state of a two-Higgs-doublet model?

Testing a dynamical origin of standard model fermion masses

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