On General Axial Gauges for QCD
نویسندگان
چکیده
منابع مشابه
On General Axial Gauges for QCD
General Axial Gauges within a perturbative approach to QCD are plagued by 'spurious' propagator singularities. Their regularisation has to face major conceptual and technical problems. We show that this obstacle is naturally absent within a Wilsonian or 'Exact' Renormalisation Group approach and explain why this is so. The axial gauge turns out to be a xed point under the ow, and the universal ...
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We present a formulation of non-Abelian gauge theories in general axial gauges using a Wilsonian (or ’Exact’) Renormalisation Group. No ’spurious’ propagator divergencies are encountered in contrast to standard perturbation theory. Modified Ward identities, compatible with the flow equation, ensure gauge invariance of physical Green functions. The axial gauge nA = 0 is shown to be a fixed point...
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The axial-gauge boson propagator contains 1/(η · k) p-type singularities. These singualarities have generally been treated by inventing prescriptions for them. We propose an alternative procedere for treating these singularities in the path-integral formalism using the known way of treating the 1/k 2n-type singularities in Lorentz-type gauges. For this purpose we use a finite field-dependent BR...
متن کاملar X iv : h ep - t h / 98 09 02 3 v 1 3 S ep 1 99 8 On General Axial Gauges for QCD ∗
General Axial Gauges within a perturbative approach to QCD are plagued by ’spurious’ propagator singularities. Their regularisation has to face major conceptual and technical problems. We show that this obstacle is naturally absent within a Wilsonian or ’Exact’ Renormalisation Group approach and explain why this is so. The axial gauge turns out to be a fixed point under the flow, and the univer...
متن کاملRenormalization group flows for gauge theories in axial gauges
Gauge theories in axial gauges are studied using Exact Renormalisation Group flows. We introduce a background field in the infrared regulator, but not in the gauge fixing, in contrast to the usual background field gauge. We discuss the absence of spurious singularities and the finiteness of the flow. It is shown how heat-kernel methods can be used to obtain approximate solutions to the flow and...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1999
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(99)00188-7