Inverse LandauKhalatnikov transformation and infrared critical exponents of (2+1)dimensional quantum electrodynamics
Abstract
By applying an inverse LandauKhalatnikov transformation, connecting (resummed) SchwingerDyson treatments in nonlocal and Landau gauges of QED_{3}, we derive the infrared behaviour of the wavefunction renormalization in the Landau gauge, and the associated critical exponents in the normal phase of the theory (no mass generation). The result agrees with the one conjectured in earlier treatments. The analysis involves an approximation, namely an expansion of the nonlocal gauge in powers of momenta in the infrared. This approximation is tested by reproducing the critical number of flavours necessary for dynamical mass generation in the chiralsymmetrybroken phase of QED_{3}.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)004474
 arXiv:
 arXiv:hepth/9701087
 Bibcode:
 1997PhLB..402..154A
 Keywords:

 High Energy Physics  Theory;
 Condensed Matter
 EPrint:
 13 pages LATEX, 1 Figure (included automatically)