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A new dynamical symmetry breaking model of electroweak interactions is proposed based on interacting fermions. Two fermions of different SU_{L}(2) representations form a symmetry breaking condensate and generate the lepton and quark masses. The weak gauge bosons get their usual standard model masses from a gauge invariant Lagrangian of a doublet scalar field composed of the new fermion fields. The new fermion fields become massive by condensation. It is shown that the new charged fermions are produced at the next linear colliders in large number. The model is a low energy one which cannot be renormalized perturbatively. For the parameters of the model unitarity constraints are presented., 8 pages, 1 figure

In the standard model of electroweak interactions the Higgs doublet is replaced by a doublet of vector bosons and the gauge symmetry is broken dynamically. This generates masses for the gauge bosons and fermions, as well as it fixes the interactions in the model. The model has a low momentum scale. In this note we show that the model survives the test of the $ \rho $ parameter, and to each momentum scale $ \rho $ chooses a possible range of vector boson masses., Comment: 3 pages, 2 figs, TeX

We calculate the oblique electroweak corrections and confront them with the experiments in a composite Higgs version of the standard model. A vector-like weak doublet and a singlet fermion are added to the standard model without elementary Higgs. Due to quartic coupling there is a mixing between the components of the new fields triggering electroweak symmetry breaking. The Peskin-Takeuchi S and T electroweak parameters are presented. The new sector of vector-like fermions is slightly constrained, T gives an upper bound on the mixing angle of the new fermions, which is already constrained by self-consistent gap-equations. S gives no constraints on the masses. This extension can give a positive contribution to T, allowing for a heavy Higgs boson in electroweak precision tests of the Standard Model., 14 pages, 5 figures

The influence of radiative corrections is examined as regards the relation between the unitarity bound on the standard model Higgs boson mass and the scale of new physics, Λ, where perturbative unitarity is violated. For a fixed Λ, radiative corrections increase the upper bound on the Higgs mass. The shift is about 270 GeV at Λ=1 TeV and 80 (40) GeV at Λ=2 (5) TeV .

In the standard model of electroweak interactions the Higgs doublet is replaced by a complex vector doublet and a real vector singlet. The gauge symmetry is broken dynamically by a mixed condensate of the doublet and singlet vector fields. Gauge fields get their usual standard model masses by condensation. The new vector matter fields become massive by their gauge invariant selfcouplings. Fermions are assigned to the gauge group in the usual manner. Fermion masses are coming from a gauge invariant fermion-vector field interaction by a mixed condensate. The Kobayashi-Maskawa description is unchanged. It is shown that from the new matter fields a large number of spin-one particle pairs is expected at future high energy e^{+}e^{-} linear colliders of 500-1500 GeV., Comment: 8 pages, 2 figures

Motivated by the fact that the Higgs is not seen, we have proposed a version of the standard model where the scalar doublet is replaced by a vector doublet and its neutral member forms a nonvanishing condensate. Gauge fields are coupled to the new vector fields B in a gauge invariant way leading to mass terms for the gauge fields by condensation. B-particles become massive because of their self interactions. Fermion and gauge field couplings are standard. Low energy charged current phenomenology fixes the condensate. Fermion masses are coming from the condensation and B-particle-fermion couplings. The Kobayashi-Maskawa description is unchanged. The model has a low mementum scale of about 2 TeV. For instance, from tree-graph unitarity at a scale of 1 TeV the minimum mass of a charged B-particle is 369 GeV. Such B-particles are shown to copiously produced at high-energy linear $e^+e^-$ colliders. The model survives the test of oblique radiative corrections. To each momentum scale there exists a range of B masses where the S, T parameters are compatible with the experiment. For instance, at a scale of 1 TeV from the S parameter the minimum mass of a charged (neutral) B is 200-350 GeV (400-550 GeV)., 9p Latex, no figure, the original postscript file is replaced by the LaTeX src file

We replace the standard model scalar doublet by a doublet of vector fields and generate masses by dynamical symmetry breaking. Oblique radiative corrections are small if the new vector bosons ($ B^+$, $ B^0 $) are heavy. In this note it is shown that the model has a low momentum scale and above $ \Lambda \simeq 2 $ TeV it does not respect the perturbative unitarity. From tree-graph unitarity the allowed region of $B ^+ (B^0) $ mass is estimated as $m_{B^+} \geq 369 \hbox{GeV} \quad (m_{B^0} \geq 410 $ GeV) at $\Lambda= 1 $ TeV., Comment: 4 pages LATEX, no figures

Oblique radiative corrections are calculated to the parameter $S$ in a version of the standard model where the Higgs doublet is replaced by a doublet of vector bosons and the gauge symmetry is broken dynamically. We show that to each momentum scale there exists a domain of the masses of charged and neutral vector bosons where $S$ is compatible with the experiments. At a scale of 1 TeV this requires vector boson masses of at least $m_0 \approx $ 400--550 GeV, $ m_+ \approx $ 200--350 GeV., 6 pages LATEX, 1 Latex figure included

The differential cross-section of e+e− → F+F− (F+=μ +, p,π +, etc.) is calculated for arbitrarily polarized incident and outgoing beams by exchanging one photon and one neutral Z-meson coupled to neutral weak currents. The interference effects manifest themselves in significant parity-violating asymmetries for longitudinal polarizations which are about 4 (4.5)% atq=28 GeV, 9 (12.5)% atq=40 GeV for\(p\bar p (\pi ^ + \pi ^ - )\) in the Weinberg-Salam model at sin2 Θ w=0.38. The relative changes of rates are about (7 ÷ 15)% at these energies. It is shown that the Z-meson causes only unessential effects in the two-photon processes at high energies and arbitrary polarizations; furthermore, the pure two-photon contributions are negligibly influenced by including transverse polarizations.

Contributions of the rho ' meson are computed to various spectral function sum rules. The author concludes the possible existence of higher-mass axial vector mesons, isoscalar vector mesons and the importance of the higher-mass continuum, respectively.

Electromagnetic corrections due to real-photon emission are computed to energy-energy correlations in high-energy e/sup -/e/sup +/ annihilation with ..gamma.. and Z/sub 0/ exchanges.

Triple hadronic-energy correlations are suggested as a natural means for characterizing three-jet events and testing QCD in high-energy e/sup -/e/sup +/ annihilation with ..gamma..+Z/sup 0/ exchange. The general analysis of the triple correlation is given in terms of possible structure functions, and lowest-order QCD contributions are presented.

The exact O(${\ensuremath{\alpha}}_{s}^{2}$) QCD corrections to the planar triple energy correlation are studied. Both the two-dimensional distribution and the integrated correlation are considered. It is shown that planar triple energy correlation is infrared insensitive down to zero jet resolution.

The influence of an extra neutral E6 gauge boson of mass 140–300 GeV on the total cross section of e+e− annihilation into hadrons is studied at energies around the mass of the heavy neutral gauge boson.