English

The Gauge Technique in QED_{2+1}

High Energy Physics - Theory 2007-05-23 v6 High Energy Physics - Phenomenology

Abstract

The Gauge Technique has been applied to QED2+1_{2+1} in the quenched case with infrared subtraction. The behaviour of the fermion propagator near the threshold is then found to be S(p)\to \frac{(\gamma \cdot p+m)}{(p^{2}-m^{2})}(\frac{p^{2}-m^{2}}{% 2m^{2}})^{\zeta}\exp (-\frac{\eta \varsigma}{2}), where ς=e2/(4πm)\varsigma =e^{2}/(4\pi m) and this is gauge invariant except the exponential factor. We also find a spectral function in the Landau and Yennie like gauge. The propagators S(p)S(p) are expressed in terms of Φ(z,1,ς)\Phi (z,1,\varsigma) explicitly .The vacuum expectation value <ψψ>< \overline{\psi}\psi > is gauge dependent . Thus dynamical mass generation does not occur.

Keywords

Cite

@article{arxiv.hep-th/0107219,
  title  = {The Gauge Technique in QED_{2+1}},
  author = {Y. Hoshino},
  journal= {arXiv preprint arXiv:hep-th/0107219},
  year   = {2007}
}

Comments

11 pages, Latex, no figures

R2 v1 2026-07-22T15:05:36.603Z