A Bashir and R Delbourgo 2004 J. Phys. A: Math. Gen. 37 6587 doi:10.1088/0305-4470/37/25/011
The nonperturbative propagator and vertex in massless quenched QEDd
A Bashir1,2 and R Delbourgo2
Show affiliationsIt is well known how multiplicative renormalizability of the fermion propagator, through its Schwinger–Dyson equation, imposes restrictions on the 3-point fermion–boson vertex in massless quenched quantum electrodynamics in four dimensions. Moreover, perturbation theory serves as an excellent guide for possible nonperturbative constructions of Green functions. We extend these ideas to arbitrary dimensions d. The constraint of multiplicative renormalizability of the fermion propagator is generalized to a Landau–Khalatnikov–Fradkin transformation law in d dimensions and it naturally leads to a constraint on the fermion–boson vertex. We verify that this constraint is satisfied in perturbation theory at the one-loop level in three dimensions. Based upon one-loop perturbative calculation of the vertex, we find additional restrictions on its possible nonperturbative forms in arbitrary dimensions.
- PACS
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12.20.Ds Specific calculations
- MSC
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81V10 Electromagnetic interaction; quantum electrodynamics
- Subjects
- Dates
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Issue 25 (25 June 2004)
Received 20 February 2004
Published 9 June 2004
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The nonperturbative propagator and vertex in massless quenched QEDd
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