منابع مشابه
Effective charge and fermion mass in strong coupling Quantum Electrodynamics
The effective charge and the dynamical electron mass are calculated non-perturbatively in strong coupling 3+1 dimensional quantum electrodynamics. Within the formalism of Dyson-Schwinger equations we solve the coupled equation for electron and photon propagator in Landau gauge. We restrict ourselves on the choice of Ball-Chiu vertex which is the minimal Anstaze for maintaing the gauge covarianc...
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The description of the infrared hadron dynamics remains a crucial challenge for elementary particle physics. Whereas perturbative calculations allow for a detailed study of the strong interaction processes at high energies, to date there is no reliable theoretical method which would enable one to handle the hadron dynamics at low energies. However, many physical phenomena are tightly bound to t...
متن کاملMass and Coupling Constant Limits from Convergence Conditions on the Effective Charge in QED
The massless fermion limit of QED is discussed. For on-shell renormalisation the high energy behaviour fixes no lower limit on the mass of the lightest fermion if the fine structure constant α is allowed to vary. The choice of an arbitary (spacelike) subtraction point does, however, fix a lower limit on the mass of the lightest fermion, for any subtraction scale μ, if the effective charge α (μ)...
متن کاملMass and Coupling Constant Limits from Convergence Conditions on the Effective Charge in QED
The massless fermion limit of QED is discussed. For on-shell renormalisation the high energy behaviour fixes no lower limit on the mass of the lightest fermion if the fine structure constant α is allowed to vary. The choice of an arbitary (spacelike) subtraction point does, however, fix a lower limit on the mass of the lightest fermion, for any subtraction scale μ, if the effective charge αeff ...
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We show that the description of the electroweak interactions based on noncommutative geometry of a continuous and a discrete space gives no special relations between the Higgs mass and other parameters of the model. We prove that there exists a gauge invariant term, linear in the curvature, which is trivial in the standard differential geometry but nontrivial in the case of the discrete geometr...
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ژورنال
عنوان ژورنال: Foundations of Physics
سال: 2008
ISSN: 0015-9018,1572-9516
DOI: 10.1007/s10701-008-9209-1