Showing papers on "Electroweak interaction published in 1979"
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TL;DR: In this article, it was shown that fundamental scalar fields can be eliminated from the theory of weak and electromagnetic interactions by constructing an explicit example in which the scalar field sectors are replaced by strongly interacting gauge systems.
743 citations
TL;DR: An example of the unification of electroweak, color, and heavy-color forces in the unifying group SU(7) is presented in this article, where a simple toy model predicts a nontrivial mass spectrum for two families of quarks and leptons.
Abstract: An example of the unification of electroweak, color, and heavy-color forces in the unifying group SU(7) is presented. This simple toy model predicts a nontrivial mass spectrum for two families of quarks and leptons. The usual Higgs scalar sector is replaced by the strong interaction heavy-color sector at \ensuremath{\sim} 1 TeV.
114 citations
TL;DR: In this article, the electroweak interactions were modeled as a gauge theory of the graded Lie group SU(2|1) in higher space-time dimensions, and it was shown that the number of leptons allowed in the model is related to the extra dimensions beyond four.
21 citations
TL;DR: In this paper, the Adler-Bell-Jackiw (ABJ) anomaly for gauge theories with couplings is discussed, and the presence of a new anomaly, in addition to the ABJ anomaly, is hinted at for the general non-Abelian case.
Abstract: The presence of a new anomaly, in addition to the Adler-Bell-Jackiw (ABJ) anomaly, is hinted at for gauge theories with ${\ensuremath{\gamma}}_{5}$ couplings. The ABJ anomaly is discussed first by translation of variables of a linearly divergent integral, then by dimensional regularization. Using the second method, the general non-Abelian case is considered in the presence of an overlapping divergence. A new anomaly is suggested which is not, in general, canceled by the usual restrictions because fermion masses are involved. Assuming no cancellation between different Feynman diagrams and current-algebra quark masses then leads to the conclusion that the standard model of quantum flavor dynamics (i.e., that of Glashow, Salam, and Weinberg) might be nonrenormalizable. Imposition of renormalizability would then imply that new dynamical constraints be met. Hence, only that part of the quark mass corresponding to the lepton mass in the same quark-lepton generation is generated by the electroweak interactions. The remaining mass comes presumably from the strong interaction for which the dynamical theory must therefore have at least some flavor dependence.
12 citations
TL;DR: In this article, the unification of the electromagnetic force with the weak (within the context of the SU(2) × U(1) theory), the strong forces with the electroweak and the gravitational quanta with leptons, quarks, Yang-Mills quanta and Higgs particles are reviewed.
Abstract: Unification of the electromagnetic force with the weak (within the context of the SU(2) × U(1) theory), unification of the strong force with the electroweak (within the context of Grand Unification schemes) and unification of gravitational quanta with leptons, quarks, Yang-Mills quanta and Higgs particles (within the context of supergravity theories) is reviewed.
10 citations
TL;DR: In this paper, Weinberg's model is considered to arise basically from aU(1)×SU(2, loc) invariant theory involving only the left-handed 2×2 component Weyl isospinor-spinor field and the isovector-vector gauge field as fundamental fields, spontaneous breakdown of symmetry is not effected by an additional Higgs field, but by condensation of fermion pairs.
Abstract: The electroweak interactions of leptons described successfully by Weinberg's model are considered to arise basically from aU(1)×SU(2, loc) invariant theory involving only the left-handed 2×2 component Weyl isospinor-spinor field and the isovector-vector gauge field as fundamental fields, spontaneous breakdown of symmetry is not effected by an additional Higgs field, but by a condensation of fermion pairs. The generation of effective isospin-shielded local fields, the right-handed isoscalar spinor field for constructing massive electrons and the isoscalar vector gauge field related to hypercharge, is the consequence of a dressing mechanism peculiar to the asymmetric ground-state situation. Electric charge in this case is simply «isospin charge» and hypercharge merely reflects the isospin charge of the anomalous dressing.
4 citations
TL;DR: The status of the electroweak gauge theory, also known as quantum asthenodynamics (QAD), is examined in this article, where the WS-GIM model describes the data well, although one should look for signs of further complexity and better tests of its gauge theory aspect.
Abstract: The status of the electroweak gauge theory, also known as quantum asthenodynamics (QAD), is examined. The major result is that the standard WS-GIM model describes the data well, although one should still look for signs of further complexity and better tests of its gauge theory aspect. A second important result is that the measured values of the three basic coupling constants of present-energy physics, g/sub s/, g, and ..sqrt..(5/3)g' of SU(3)/sub c/ x SU(2)/sub 2/ x U(1), are compatible with the idea that these interactions are unified at high energies. Much of the paper deals with open questions, and it takes up the following topics: the status of QAD, the scalar meson spectrum, the fermion spectrum, CP violation, and decay dynamics. 118 references, 20 figures. (RWR)
01 Dec 1979
TL;DR: The status of the electroweak gauge theory, also known as quantum asthenodynamics (QAD), is examined in this article, where the WS-GIM model describes the data well, although one should look for signs of further complexity and better tests of its gauge theory aspect.
Abstract: The status of the electroweak gauge theory, also known as quantum asthenodynamics (QAD), is examined. The major result is that the standard WS-GIM model describes the data well, although one should still look for signs of further complexity and better tests of its gauge theory aspect. A second important result is that the measured values of the three basic coupling constants of present-energy physics, g/sub s/, g, and ..sqrt..(5/3)g' of SU(3)/sub c/ x SU(2)/sub 2/ x U(1), are compatible with the idea that these interactions are unified at high energies. Much of the paper deals with open questions, and it takes up the following topics: the status of QAD, the scalar meson spectrum, the fermion spectrum, CP violation, and decay dynamics. 118 references, 20 figures. (RWR)
01 Jan 1979
TL;DR: In this paper, the authors address two main questions: 1) How good is the evidence in favor of SU(2) x U(1), and 2) How convincing is QCD?
Abstract: The successes of gauge theories in explaining many outstanding issues of the weak and electromagnetic interactions created the optimism that a gauge theory could also explain many problems of strong interactions as well. This led to the present picture where there is a successful theory of the electroweak force and a promising candidate for the theory of the strong interactions. In these lectures I address two main auestions:
1)
How good is the evidence in favor of SU(2) x U(1)?
2)
How convincing is the evidence for QCD?