Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-09-17
Int.J.Mod.Phys. A15 (2000) 1453-1480; Erratum-ibid. A15 (2000) 3899
Physics
High Energy Physics
High Energy Physics - Theory
34 pages, LaTex, 2 ps figures; some comments on Wilson loop and two references added; (this) revised version to appear in Int.
Scientific paper
10.1142/S0217751X00000653
The propagators in axial-type, light-cone and planar gauges contain 1/(\eta\cdot k)^p-type singularities. These singularities have generally been treated by inventing prescriptions for them. In this work, we propose an alternative procedure for treating these singularities in the path integral formalism using the known way of treating the singularities in Lorentz gauges. To this end, we use a finite field-dependent BRS transformation that interpolates between Lorentz-type and the axial-type gauges. We arrive at the $\epsilon$-dependent tree propagator in the axial-type gauges. We examine the singularity structure of the propagator and find that the axial gauge propagator so constructed has {\it no} spurious poles (for real $k$). It however has a complicated structure in a small region near $\eta\cdot k=0$. We show how this complicated structure can effectively be replaced by a much simpler propagator.
Joglekar Satish D.
Misra Aalok
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