منابع مشابه
Chiral Symmetry Breaking in Strongly Coupled Qed?
The coupled system of renormalized Dyson-Schwinger equations for the electron self-energy and the photon propagator are supplied with the tree level vertex as Ansatz for the renormalized three point function. The system is investigated numerically. In the case of a massive electron, the theory is " weakly renormalizable " , i.e. cutoff independent for values of the cutoff below an upper limit. ...
متن کاملDynamical Mass in Strongly Coupled QED
We review dynamical mass generation in three and four dimensional Ableian gauge theories. The basic approach analyzed here is to solve Schwinger-Dyson equations in some approximations. In both cases, the coupling has to be larger than a critical value to have dynamical symmetry breaking. In QED4, chiral symmetry is spontaneouly broken if α > αc(≃ π/3) in ladder approximation. The electron becom...
متن کاملCERN-TH/96-195 Strongly Coupled QED ∗
A short review of some of the most relevant contributions to non-perturbative QED is done. Since a Gaussian behaviour of QEDà la λφ 4 has been ruled out by the numerical data, I analyse the other two most reliable scenarios, i.e. trivialityà la Nambu-Jona Lasinio and non-Gaussian critical behaviour. I give a suggestive theoretical argument against a Gaussian behaviour of QEDà la Nambu-Jona Lasi...
متن کاملChiral symmetry breaking in strongly coupled scalar QED 1
Scalar QED with fermions is investigated in an expansion in powers of the inverse gauge coupling constant. The fermion mass generation is studied in next to leading order of the strong coupling expansion for the Higgs-phase of the model. Chiral symmetry breaking is discussed. Our approach supports from a strong coupling point of view the results obtained earlier by Miransky, Bardeen and Kondo. ...
متن کاملSpectroscopy, Scaling and Critical Indices in Strongly Coupled Quenched QED
The interplay of spectroscopy, scaling laws and critical indices is studied in strongly coupled quenched QED. Interpreted as a model of technicolor having strong interactions at short distances, we predict the techni-meson mass spectrum in a simplified model of a dynamically generated top quark mass Mf . Our results support the strict inequality that the techni-sigma mass Mσ is less than twice ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1997
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(96)00609-3