Showing papers on "Electroweak interaction published in 1988"
TL;DR: In this article, the authors present a non-equilibrium method for studying anomalous B -nonconservation in the electroweak theory at finite temperature, and derive formally the equation of B -evolution advocated previously on physical grounds.
420 citations
TL;DR: In this article, the authors investigated the connection of the baryon asymmetry of the universe (BAU) with the Chern-Simons structure of the ground state of gauge theories at high temperatures.
194 citations
TL;DR: In this paper, the cross section for e+e− → W+W− with arbitrary polarizations of the leptons and bosons is calculated in the standard electroweak model including the complete one-loop virtual and soft-photon bremsstrahlung corrections.
180 citations
TL;DR: In this paper, the SU(2) Higgs sector with spontaneously broken O(4) symmetry and perturbative gauge coupling becomes a trivial field theory at infinite cutoff, and a low-energy effective theory is found with non-trivial couplings and mass generation from spontaneous symmetry breaking.
Abstract: The electroweak model with one Higgs doublet is investigated when the mass of the Higgs particle is larger than the weak-interaction scale. It is shown that the SU(2) Higgs sector with spontaneously broken O(4) symmetry and perturbative gauge coupling becomes a trivial field theory at infinite cutoff. Around the trivial Gaussian fixed point, for finite cutoff, a low-energy effective theory is found with non-trivial couplings and mass generation from spontaneous symmetry breaking. We find an upper bound of ${M}_{H}\ensuremath{\approx}640$ GeV on the mass of the Higgs particle with a lattice momentum cutoff $2\ensuremath{\pi}$ times larger than the Higgs-boson mass.
168 citations
TL;DR: A quantum field theory for electroweak interaction and gravitational interaction with local scale invariance and local SU(2) x U(1) gauge invariance is proposed, leading to the existence of Weyl's vector meson which eats up the Higgs particle remaining in the Weinberg-Salam model.
Abstract: A quantum field theory for electroweak interaction and gravitational interaction with local scale invariance and local SU(2) \ensuremath{\bigotimes} U(1) gauge invariance is proposed. The requirement of local scale invariance leads to the existence of Weyl's vector meson which absorbs the Higgs particle remaining in the Weinberg-Salam model.
140 citations
01 Jan 1988
TL;DR: In this article, the authors present a collection of papers on electroweak and strong interactions, general relativity, and quantum theory, including Hamiltonian formulations of QCD and aspects of confinement and Mass spectrum of Higgs bosons at the Fermi scale.
Abstract: This book contains papers on electroweak and strong interactions, general relativity, and quantum theory. Topics covered include: Hamiltonian formulations of QCD and aspects of confinement and Mass spectrum of Higgs bosons at the Fermi scale.
115 citations
TL;DR: In this article, a geometrical interpretation of CP violation in terms of areas of unitarity triangles is presented, in the standard electroweak model with three families of quarks, and the extension of the results to the case of four families is investigated.
110 citations
TL;DR: In this article, a detailed discussion of the electroweak radiative corrections to the partial decay widths of the Z boson into lepton and quark pairs (q≠t) and to the total width for 5 flavors are presented.
Abstract: We present a detailed discussion of the electroweak radiative corrections to the partial decay widths of theZ boson into lepton and quark pairs (q≠t) and to the total width for 5 flavors. The results are only very weakly dependent on the Higgs mass. The top mass dependence leads to sizable variations ofΓ
z
which have to be taken into account for precision experiments at thee
+
e
− colliders LEP and SLC.
87 citations
TL;DR: Partial wave unitarity applied to fermion-pair annihilation into WZ, Wγ or W + W − severely limits any deviation of the ZWW and γWW three vector boson vertices from the standard model prediction as mentioned in this paper.
80 citations
01 Aug 1988
TL;DR: The most relevant data, parametrizations, theoretical background, and a chapter on detectors for high energy e/sup +/e/sup -/ physics can be found in this article.
Abstract: With the termination of the physics program at PETRA in a year from now, and with the start of TRISTAN and the SLC and later LEP, an era of e/sup +/e/sup -/ physics will come to an end and a new one begins. The field is changing from a field of a few specialists, to becoming one of the mainstream efforts of the high energy community. It seems appropriate at this moment to summarize what has been learned over the past years, in a way more useful to any high energy physicist in particular to newcomers in the e/sup +/e/sup -/ field. This is the purpose of the book. This book should be used as a reference for future workers in the field of e/sup +/e/sup -/ interactions. It includes the most relevant data, parametrizations, theoretical background, and a chapter on detectors. Contents: Foreword; Detectors for High Energy e/sup +/e/sup -/ Physics; Lepton Pair Production and Electroweak Parameters; Hadron Production, Strong and Electroweak Properties; tau Physics; Recent Results on the Charm Sector; Bottom Physics; Lifetime Measurements of tau, Charmed and Beauty Hadrons; UPSILON Spectroscopy; Hadronic Decays of the UPSILON; Quark and Gluon Fragmentation in the e/sup +/e/sup -/ Continuum; Jetmore » Production and QCD; Two Photon Physics; Search for New Particles.« less
69 citations
TL;DR: In this paper, the authors analyzed the validity of the effective W approximation in the standard model under the conditions appropriate to a search for a very heavy Higgs boson at the SSC.
TL;DR: A review of what is known about the unexplained mechanism that breaks the electroweak symmetry and thereby gives mass to the W and Z gauge bosons while leaving the photon massless is given in this paper.
Abstract: A review of what is known about the unexplained mechanism that breaks the electroweak symmetry and thereby gives mass to the W and Z gauge bosons while leaving the photon massless is given. Symmetry, unitarity, technicolor, supersymmetry, higgs sector dynamics, and experimental status and prospects are discussed. (AIP)
TL;DR: In this paper, the theoretical treatment of D and B meson decays is summarized in the framework of the standard gauge theory of electroweak and strong interactions, and a consistent phenomenological picture based on the valence quark approximation and the factorization hypothesis is developed.
TL;DR: In this paper, the authors studied narrow toponium resonances and other heavy quarkonium states, and the following physical problems can be solved: 1) The level spacing of the low lying states and their wave functions measure the form of the interquark potential down to distances of O (10 −2 fm).
TL;DR: In this article, the effect of virtual heavy quark effects on electroweak parameters was calculated, which may effect planned precision measurements at SLC and LEP. But the authors did not consider the effects of toponium and T b resonances.
TL;DR: In this paper, the fermionic hamiltonian in the standard electroweak theory in the presence of a sphaleron was studied, and it was shown that there exists a normalizable solution of the zero energy Dirac equation.
TL;DR: In this article, the rate of the anomalous electroweak baryon and lepton number violating processes in the case that the electroweak phase transition is of second order was calculated.
TL;DR: In this article, a minimal extension of the standard electroweak theory is presented, which, as a consequence of the spontaneous breaking of lepton number and the radiative origin of the neutrino mass, offers a natural framework for the solution of the solar neutrinos problem through matter-enhanced neutrini oscillations (Mikheyev-Smirnov-Wolfenstein mechanism).
TL;DR: In this article, the Higgs mass was assumed to have a top quark mass mt via one-loop radiative corrections in the standard model, and the combination of present data imposes mt.
TL;DR: In this paper, the authors reanalyze the constraints on the minimal N = 1 supergravity extension of the standard model arising from the requirement of a correct spontaneous breakdown of the electroweak symmetry.
Abstract: We reanalyze the constraints on the minimalN=1 supergravity extension of the standard model arising from the requirement of a correct spontaneous breakdown of the electroweak symmetry. Driven by recent experimental results, we devote special attention to the case of a top quark much heavier than the conventional choice of 40 GeV, used in previous analyses. Our results are stated in a space of phenomenologically meaningful parameters, providing a direct comparison between the constraints fromSU(2)×U(1) breaking and the predictions for supersymmetric particle production. Moreover, an upper bound for the ratio of the two Higgs vacuum expectation values is given, for any value of the top quark mass.
TL;DR: In this paper, the production of D * and D mesons was studied in e + e − annihilations at √s = 29GeV, corresponding to an integrated luminosity of 300 pb −1, were obtained using the HRS detector at PEP.
TL;DR: In this article, the longitudinally polarized forward-backward asymmetry of the FB pol was analyzed for electron-positron annihilation on Z 0 resonance. And the authors showed that a specific combination of data taken with two opposite electron polarizations is independent of the initial state details including one-loop electroweak and bremsstrahlung effects.
TL;DR: In this article, the phase diagram for a chiral Higgs-fermion model on a 4 4 lattice using dynamical fermions was calculated and two phase transition lines for non-zero values of Yukawa coupling were found, which may prove useful in finding the continuum limit of the electroweak model.
TL;DR: In this article, a consistent method to remove quark mass singularities from physical cross sections is demonstrated, where the singularities are factorised into quark and gluon distribution functions.
Abstract: A consistent method to remove quark mass singularities from physical cross sections is demonstrated. They are factorised into quark and gluon distribution functions. This implies electromagnetic correction terms to theQ2 dependent structure functions. They are calculated in leading order in the fine structure constant α and found to be flat and small overx.
TL;DR: In this paper, the renormalization group predictions for these parameters in all heterotic string models with one extra, neutral, gauge boson at low energy are determined for any model, consistent with perturbative unification and low-energy physics.
TL;DR: In this article, high-energy tests of an electroweak model which can be thought of as an effective description of the standard model for the strong-interacting longitudinal-scalar sector were discussed.
TL;DR: In this paper, the complete electroweak radiative corrections of O(α 3 ) to charged current deep inelastic electron-proton scattering at HERA energies are presented.
TL;DR: In this article, the authors studied the chiral transition in an SU(2) lattice gauge theory with Higgs fields and fermion fields with I = 1 2 and I = 0, including Yukawa couplings and showed that if at least one of the couplings is sufficiently weak, this theory undergoes a spontaneous chiral symmetry breaking phase transition.
TL;DR: In this article, cross sections for the production of three gauge bosons at e + e − and pp colliders versus CM energy were presented and the rates were measurable at high luminosity supercolliders and tested three and four gauge boson couplings of electroweak gauge theory.
TL;DR: In this paper, the cross section for e+e− → Z0Z0 with arbitrary polarizations of the leptons and bosons is calculated in the standard electroweak model including the complete one-loop virtual and soft-photon bremsstrahlung corrections.