Showing papers on "Gauge boson published in 1989"
TL;DR: In this paper, the authors survey the low-energy phenomenological implications of superstring-inspired E 6 models and present experimental limits on these particles from both accelerator and non-accelerator data.
827 citations
CERN1
TL;DR: In this paper, a refined version of the flipped,SU(5)×U(1) string model with the following properties is presented: the complete massless spectrum is derived and shown to be free of all gauge and mixed anomalies apart from a single anomalous U(1).
433 citations
TL;DR: In this paper, it was shown that the non-integrable phase factor P exp(ig ∫ A μ dx μ }, a pathordered line integral along a non-contractable loop, becomes a dynamical degree of freedom in gauge theory.
390 citations
TL;DR: In this article, the Higgs sector of supersymmetric models with an additional SU(2)×U(1)Y singlet or an additional pair of Higgs doublet superfields is investigated.
Abstract: The Higgs sector of supersymmetric models with an additional SU(2)×U(1)Y singlet or an additional pair of Higgs doublet superfields is investigated. It is shown that in the model with a Higgs singlet bounds on Higgs boson masses are considerably weaker than in the minimal supersymmetric model; in particular, all neutral scalars can be heavier than about 150 GeV or lighter than $M_Z/\sqrt{2}$, whereas the mass of the charged Higgs boson is essentially unconstrained. The four doublet model resembles the minimal model more closely; in particular, the bounds for the heaviest and lightest neutral scalar and the heaviest charged Higgs boson are unaltered. In this model, many relations between masses of different Higgs bosons can be found; 44 of the 66 possible decays of one Higgs boson into another Higgs boson plus a real W or Z boson are kinematically forbidden. It is also shown that in both models, the lightest neutral scalar becomes indistinguishable from the standard model Higgs boson if all other Higgs bos...
386 citations
TL;DR: In this article, a topological gauge theory of gravity in five dimensions is presented, based on the Chern-Simons five-form and the SO(1, 5) gauge group.
257 citations
TL;DR: In this article, a noncommutative extension of abelian gauge theory is proposed and compared with standard nonabelian theory, which is a generalization of standard non-abelian theories.
156 citations
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CERN1
TL;DR: In this paper, the static spherically symmetric gravitational equilibria of scalars coupled to a U(1) gauge field and with a possible 1 2 λ(φ ∗ φ) 2 self-interaction were studied.
112 citations
TL;DR: In this article, the SU(N) Yang-Mills theories can be described by a new type of gauge principle, where the gauge potentials become c-number functions of two additional coordinates, which parametrize the surface of an internal sphere.
100 citations
TL;DR: In this paper, the authors apply the Lorentz gauge condition to define quasidiabatic states and show that the recently proposed block diagonalization method leads automatically to the Lipschitz gauge locally.
Abstract: Following previous works [Moody et al., Phys. Rev. Lett. 56, 893 (1986) and Zygelman, Phys. Lett. A 125, 476 (1987)], we review in some detail the gauge theoretical form of the Born–Oppenheimer description of molecules. The derivative couplings which describe nonadiabatic effects play the role of gauge potentials. Applying the gauge theoretical formalism (well known in particle physics), we rederive a theorem concerning the nonexistence of strictly diabatic states. Further we propose the Lorentz gauge condition to define quasidiabatic states. We show that the recently proposed block diagonalization method to obtain quasidiabatic states leads automatically to the Lorentz gauge locally.
96 citations
TL;DR: The decoupling of the right-handed fermion in the continuum limit is proved in this article for a class of chiral lattice gauge theories for which the fermions transform trivially under the gauge group.
TL;DR: In this paper, it was shown that the lightest supersymmetric particle (LSP) is a nearly pure bino (partner of the hypercharge gauge boson) or a particular higgsino (symmetric or antisymmetric linear combination of the two neutral higgsinos with definite hypercharges).
TL;DR: In this paper, the non-linear σ-model for pions is extended to incorporate ϱ and ω-mesons as massive gauge bosons in a nonlinear realization of chiral symmetry.
TL;DR: In this paper, the anomalous dimension γm of the operator $\bar \psi\psi$ is calculated on the full critical line in the ladder QED with four-fermion interaction, and the applications of these theories to the technicolor models are discussed.
Abstract: In the ladder QED with four-fermion interaction, the anomalous dimension γm of the operator $\bar \psi\psi$ is calculated on the full critical line. It is shown that in the nonperturbative phase with the gauge coupling α(0) 1) near the critical line. This suggests that gauge theories with fourfermion interaction may be renormalizable. The applications of these theories to the technicolor models are discussed.
TL;DR: An electroweak theory in which left-handed quarks and leptons transform as doublets under separate SU(2) gauge groups is presented, which predicts small deviations in the properties of the /ital Z/ which will be visible at the SLAC Linear Collider and the CERN collider LEP.
Abstract: We present an electroweak theory in which left-handed quarks and leptons transform as doublets under separate SU(2) gauge groups. Spontaneous symmetry breakdown results in two charged and two neutral massive vector bosons. The lightest charged and neutral gauge bosons behave like the /ital W/ and /ital Z/ of the standard SU(2)/times/U(1) electroweak model. The heavier /ital W/ and /ital Z/, which can be as light as several hundred GeV, couple primarily to quarks. Our theory predicts small deviations in the properties of the /ital Z/ which will be visible at the SLAC Linear Collider and the CERN collider LEP.
CERN1
TL;DR: In this paper, a phenomenological model based on a chiral lagrangian expansion to order s 2 for the scattering amplitudes of the longitudinally polarized W L and Z L gauge bosons in the case of a generic strongly interacting symmetry breaking sector is presented.
TL;DR: In this article, a general and consistent procedure for computing scattering amplitudes in hot gauge theories is presented, which is based on the same approach as the one described in this paper.
Abstract: A general and consistent procedure for computing scattering amplitudes in hot gauge theories is outlined.
TL;DR: A supersymmetric extension of the standard strong and electroweak gauge model has the property that light quarks and leptons acquire radiative masses as the result of the breaking of a chiral symmetry by soft supersymmetry-breaking terms.
Abstract: A supersymmetric extension of the standard strong and electroweak gauge model has the property that light quarks and leptons acquire radiative masses as the result of the breaking of a chiral symmetry by soft supersymmetry-breaking terms. This radiative mechanism is then extended to include all known quarks and leptons in the context of a supersymmetric SU(3)\ifmmode\times\else\texttimes\fi{}SU(2)\ifmmode\times\else\texttimes\fi{}U(1)\ifmmode\times\else\texttimes\fi{}U(1)' gauge model based on ${\mathrm{E}}_{6}$ particle content as the possible low-energy limit of a superstring theory.
TL;DR: In this article, the Z_N orbifold models with N = 1 space-time supersymmetry are cxamined and all gauge groups of Z-N models are classified completely.
Abstract: Z_N orbifold models which have N=1 space-time supersymmetry are cxamined. All gauge groups of Z_N orbifold models are classified completely.
TL;DR: A nonperturbative analysis of an SU(3)C×SU(2)L×U(1)Y model regularized on a lattice is presented in this paper.
TL;DR: In this paper, the authors consider several processes which are sensitive to the existence of a light gauge boson coupled to baryon number and show that the best limits on the coupling come from rare π 0 decays, while a boson with mass between M π and 2 Mπ may be observed in K + decays or η decays.
TL;DR: In this paper, it was shown that superconductivity in strongly correlated electronic systems described by the Hubbard model for slightly less than half-filled band is derived from the condensation of charge + e holons which are bosons.
Abstract: Superconductivity in the strongly correlated electronic systems described by the Hubbard model for slightly less than half-filled band is shown to arise from the condensation of charge + e holons which are bosons. The holon effective mass is found to be very close to that of the band electrons and they have a strong nearest neighbour repulsion induced by the spin fluctuations. They interact with an U(1) part of the collective SU(2) gauge field (named S-gauge field) of the spin system. This results in spontaneous symmetry breaking of the holon field and the appearance of the Anderson-Higgs phenomenon. The interesting possibility of the SU(2) gauge field-spinon coupled system retaining some gapless excitation spectrum inspite of the spontaneous symmetry breaking in the holon field is pointed out.
TL;DR: In this paper, a Higgs scalar is shown to transmute a non-dynamical Chern-Simon term into topologically massive, parity-violating, electrodynamics.
Abstract: In D=3, a Higgs scalar is shown to transmute a non-dynamical Chern-Simon term into topologically massive, parity-violating, electrodynamics. A similar transmutation also occurs for gravity.
TL;DR: In this article, the canonical structures of U(1) gauge theories with the Chern-Simons term as the kinetic term of the gauge field, following the generalized hamiltonian formalism, were investigated.
TL;DR: In this paper, the gauge invariance of the Yukawa couplings responsible for quark and lepton masses has been shown to restrict possible extra U(1) gauge symmetries in one-Higgs-doublet models.
TL;DR: In this article, the locally gauge invariant Lagrangians on the jet bundle J1 (E Θ C) for interacting particle and gauge fields were classified for the case when P = M × G. The emphasis of the paper is a formulation of the results in terms of geometric objects on associated bundles over M rather than on bundles over P.
TL;DR: The spectrum of massive neutral gauge bosons consist of the ${Z}^{0}$ of the standard electroweak model and two additional neutral bosons with mass lower bounds of 120 and 210 GeV which makes these particles prospective candidates for production in the energy regimes of the CERN LEP, Fermilab Tevatron, and the Superconducting Super Collider.
Abstract: The possibility that gauge symmetries associated with baryon and lepton numbers are spontaneously broken symmetries of nature is entertained. In this endeavor, the gauge group of electroweak interactions is SU(2)\ifmmode\times\else\texttimes\fi{}U${(1)}^{3}$. Consistent with neutral-current phenomenology, the spectrum of massive neutral gauge bosons consist of the ${Z}^{0}$ of the standard electroweak model and two additional neutral bosons with mass lower bounds of 120 and 210 GeV which makes these particles prospective candidates for production in the energy regimes of the CERN LEP, Fermilab Tevatron, and the Superconducting Super Collider.
TL;DR: In this article, the light-cone gauge formulation of 2D gravity was extended to (1, 1) supergravity and the conformal gauge was derived from the lightcone formulation.
Abstract: We derive the light-cone gauge formulation of 2D gravity recently discussed by Polyakov in a way which relates it to the conformal gauge. This formulation is extended to (1, 1) supergravity.
TL;DR: In this article, the 1-loop induced fermionic couplings of gauge bosons and would-be Goldstone bosons were calculated in an SU(2) × U(1) gauge theory with nonlinear SSB.
TL;DR: In this article, the authors consider the possibility of shielding a relatively large Mossbauer source against its conventional activity, and look for new types of penetrating monochromatic radiation that would resonantly excite the same transition in an outside detector.