Renormalization Group Flow in {QED}: An Investigation of the Schwinger-dyson Equations
Mar, 199019 pages
Published in:
- Nucl.Phys.B 356 (1991) 27-45
- Published: 1991
Report number:
- DESY-90-029
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Abstract: (Elsevier)
In this paper I investigate the behaviour of strongly coupled QED using a set of truncated Schwinger-Dyson equations which include the effects of vacuum polarisation. I pay particular attention to the renormalisation group flow. The model has a second-order chiral phase transition, but the renormalised photon coupling α T is zero at the critical point. I also examine the effects of adding a four-fermion interaction, and find that even with this extra term the photon decouples at the phase transition.- quantum electrodynamics: strong coupling
- strong coupling: quantum electrodynamics
- Dyson-Schwinger equation: solution
- vacuum polarization
- renormalization group
- symmetry: chiral
- spontaneous symmetry breaking
- critical phenomena
- photon: decoupling
- decoupling: photon
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