منابع مشابه
Patterns of Spontaneous Chiral Symmetry Breaking in Vectorlike Gauge Theories
It has been conjectured that spontaneous chiral symmetry breaking in strongly coupled vectorlike gauge theories falls into only three different classes, depending on the gauge group and the representations carried by the fermions. We test this proposal by studying SU(2), SU(3) and SU(4) lattice gauge theories with staggered fermions in different irreducible representations. Staggered fermions a...
متن کاملThe C-Theorem and Chiral Symmetry Breaking in Asymptotically Free Vectorlike Gauge Theories
We confront Cardy’s suggested c-function for four-dimensional field theories with the spontaneous breaking of chiral symmetries in asymptotically free vectorlike gauge theories with fermions transforming according to different representations under the gauge group. Assuming that the infrared limit of the c-function is determined by the dimension of the associated Goldstone manifold, we find tha...
متن کاملThe Advantages of Being Vectorlike
Consider an asymptotically free gauge theory with global symmetry group G. At short distances this gauge theory allows a perturbative definition. One fundamental question at long distances relates to how the symmetry group G is realized in the vacuum. Virtually no progress has been made in answering this question from first principles in QCD, the gauge theory responsible for all hadronic and nu...
متن کاملPhenomenology of heavy vectorlike leptons
We study the impact that a heavy generation of vectorlike leptons can have on the value of the electric dipole moment of the electron, and the rates for the flavor violating processes ! e and ! 3e. The smallness of the charged lepton masses suggests that at least some of the Yukawa coupling constants of the vectorlike leptons to the ordinary leptons or amongst themselves are small, but even wit...
متن کاملSymmetry properties of SU3 vector coupling coefficients
A presentation of the problem of calculating the vector coupling coefficients for SU3 ⊃ SU2⊗U1 is made, in the spirit of traditional treatments of SU2 coupling. The coefficients are defined as the overlap matrix element between product states and a coupled state with good SU3 quantum numbers. A technique for resolution of the outer degeneracy problem, based upon actions of the infinitesimal gen...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1977
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.57.237