ar X iv : h ep - p h / 99 11 48 4 v 1 2 5 N ov 1 99 9 Comment on the paper : “ Feynman - Schwinger representation approach to
نویسندگان
چکیده
Comment on the paper: " Feynman-Schwinger representation approach to nonperturbative physics " by C ¸. S ¸avklı et al. Abstract We point out that the scalar Wick-Cutkosky model (with χ 2 φ interaction) used in this study has been known for a long time to be unstable. However, the numerical results presented in this paper do not show any sign of this instability which casts some doubt on their reliability. We compare with the worldline variational approach.
منابع مشابه
ar X iv : h ep - t h / 96 11 04 5 v 1 7 N ov 1 99 6 Multiloop Feynman Integrals in the Worldline Approach ∗
We explain the concept of worldline Green functions on classes of multiloop graphs. The QED β – function and the 2-loop Euler-Heisenberg Lagrangian are discussed for illustration. HD-THEP-96/44 HUB-EP-96/29 ∗Talk presented by M.G.Schmidt at the Dubna Joint Meeting: International Seminar on Path Integrals: Theory and Applications, and 5th International Conference on Path Integrals from meV to Me...
متن کاملar X iv : h ep - p h / 94 11 26 3 v 1 1 0 N ov 1 99 4 ISU – NP – 94 – 14 Massive Schwinger Model for Small Fermion Mass
We examine QED 1+1 (the massive Schwinger model) to extend existing perturbation results in m f /m b , and compare our results with lattice and DLCQ calculations.
متن کامل