The top quark mass in a supersymmetric standard model with dynamical symmetry breaking

Clark, T. E.; Love, S.T.; Bardeen, William A.

doi:10.1016/0370-2693(90)91435-e

Cited by 64 publications

(57 citation statements)

References 21 publications

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“…Considering only the fermion terms we obtain NambuJona-Lasinio interactions (λλ)(λλ) and (ψσ mψ ) 2 , where ψ is some observable fermion matter field. The second term can induce the electroweak symmetry breaking and could explain the hierarchy between the susy breaking scale and the electroweak scale by a top-antitop condensation mechanism [17]. The coupling in front of this term is of the order G ∼ 1 Λ 2 and is unable to produce the condensation for values G < G c ∼ 1 Σ 2 where Σ is a typical value for the soft-breaking terms.…”

Section: Discussionmentioning

confidence: 99%

Composite supersymmetric axion-dilaton-dilatino system and the breaking of supersymmetry

Dudas

1994

Phys. Rev. D

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The spontaneous breakdown of the scale, the chiral and the superconformal symmetries for a hidden SU (N ) gauge group is studied in an effective lagrangean approach. The relevant low-energy degrees of freedom are taken to be the composite Goldstone particles associated with these three broken symmetries. Supersymmetry is spontaneously broken in the large N limit and soft breaking terms in the observable sector are generated, together with nonrenormalisable NambuJona-Lasinio type interactions. 8 GeV < Λ < 10 12 GeV .To obtain such values in a natural way (avoiding a new hierarchy problem) the composite models of axions [3] seem to be the most simple and elegant. A new gauge group is introduced with the corresponding coupling constant becoming strong at the scale Λ producing fermion condensation and the breaking of the Peccei-Quinn symmetry. These models need new exotic coloured fermions whose only manifestation at low energies is through the composite axion.The dilaton was originally introduced with the hope of understanding the cosmological constant problem, i.e. why the cosmological constant postulated by Einstein in the general relativity field equations is so small [4]. Even if it fails in this respect it has remarkable properties worth to be studied. At the classical level it restores the dilatation invariance and is the Goldstone boson associated with the spontaneaous breakdown of this symmetry.In a supersymmetric theory the two symmetries seem to be very close in the sense that the corresponding improved currents, together with the supersymmetry current transform into themselves under supersymmetry and form a realsupermultiplet of currents [5].The corresponding charges together with Poincaré, supersymmetry and conformal generators give rise to the superconformal algebra [6]. Classically the superconformal group is a symmetry in the limit of zero masses and is plagued with quantum anomalies [7].Introducing a common scale Λ for the dynamical breaking of the three symmetries and remembering that the fermionic current was the supersymmetry cur-2 rent, Λ will correspond to the spontaneous breaking of supersymmetry with the corresponding Goldstone fermion called dilatino. The easiest way to break supersymmetry in such a way that the soft breaking terms are in the 1TeV region is to suppose that supersymmetry is broken in a hidden sector communicating very weakly with the observable one [8]. This scenario appears naturally in the heterotic superstrings models [9], in which the hidden sector couples through gravitational interactions.The dilaton-axion system arises naturally in any superstring inspired model in the d = 10 supergravity multiplet and in the compactification process as internal manifold degrees of freedom [10].The purpose of this paper is to construct a low energy-effective lagrangian of the observable matter coupled to the axion-dilaton-dilatino system in a composite model where they are dynamically generated composite particles.Consider a N = 1 supergravity theory containing a hidden and an ...

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Section: Discussionmentioning

confidence: 99%

Composite supersymmetric axion-dilaton-dilatino system and the breaking of supersymmetry

Dudas

1994

Phys. Rev. D

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“…It is a small step from these types of theory to top quark condensate theories, first postulated by Nambu (1989), and subsequently studied by Miransky et al (1989), Marciano (1989) and Bardeen et al (1990). Shortly afterwards King and Mannan (1990) showed how the effect of the four-fermion operator could be replaced by heavy gauge boson exchange.…”

Section: Four-fermion Theorymentioning

confidence: 99%

“…Two Higgs doublet models resulting from top and bottom condensates were discussed by Suzuki (1990a) and Luty (1990). Much of the discussion of the present section is taken from Bardeen et al (1990).…”

Section: Four-fermion Theorymentioning

confidence: 99%

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Dynamical electroweak symmetry breaking

King

1995

Rep. Prog. Phys.

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We review the status of and recent developments in dynamical electroweak symmetry breaking, concentrating on the ideas of technicolour and top quark condensates. The emphasis is on the essential physical ideas and experimental implications rather than on detailed mathematical formalism. After a general overview of the subject, we give a first introduction to technicolour, and extended technicolour, illustrating the ideas with a simple (unrealistic) model. Then we review the progress that has been made with enhancing the technicolour condensate, using the Schwinger-Dyson gap equation. The discussion includes the so-called walking technicolour and strong extended technicolour approaches. We then turn to the experimental prospects of technicolour models, including longitudinal gauge boson scattering experiments at the LHC, the detection of pseudo-Goldstone bosons and the hints about electroweak symmetry breaking which comes from precision measurements at LEP. We also discuss a low-scale technicolour model, which has experimental signatures at LEP and the Tevatron. Finally we turn to the idea of the top quark condensate. After reviewing the basic ideas of this approach, we turn to some extensions of these ideas involving the idea of fourth family condensates, and the role of irrelevant operators.

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“…This naturally leads to Higgs boson and quark masses of about 200 GeV, thereby creating a hierarchy problem similar to the one present in the SM. A supersymmetric version [4,5] solves the hierarchy problem and, for values of the compositeness scale of order of the grand unification scale, easily accommodates the measured top quark mass values. In such an extension, however, a four Fermi interaction scale of the order of the soft supersymmetry breaking masses is required, leaving us with the problem of understanding the origin of such a scale.…”

Section: Introductionmentioning

confidence: 99%

Probing heavy Higgs boson models with a TeV linear collider

Choudhury

Tait²,

Wagner

2002

Phys. Rev. D

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The last years have seen a great development in our understanding of particle physics at the weak scale. Precision electroweak observables have played a key role in this process and their values are consistent, within the Standard Model interpretation, with a light Higgs boson with mass lower than about 200 GeV. If new physics were responsible for the mechanism of electroweak symmetry breaking, there would, quite generally, be modifications to this prediction induced by the non-standard contributions to the precision electroweak observables. In this article, we analyze the experimental signatures of a heavy Higgs boson at linear colliders. We show that a linear collider, with center of mass energy √ s < ∼ 1 TeV, would be very useful to probe the basic ingredients of well motivated heavy Higgs boson models: a relatively heavy SM-like Higgs, together with either extra scalar or fermionic degrees of freedom, or with the mixing of the third generation quarks with non-standard heavy quark modes.

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The top quark mass in a supersymmetric standard model with dynamical symmetry breaking

Cited by 64 publications

References 21 publications

Composite supersymmetric axion-dilaton-dilatino system and the breaking of supersymmetry

Composite supersymmetric axion-dilaton-dilatino system and the breaking of supersymmetry

Dynamical electroweak symmetry breaking

Probing heavy Higgs boson models with a TeV linear collider

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