FIZIKA B 10 (2001)  2, 73-82

 size 126 kBsize 260 kB

REALISTIC REGULARIZATION OF THE QED GREEN FUNCTIONS

MARIJAN RIBARIČ and LUKA ŠUŠTERŠIČ

Corresponding author; Phone +386 1 477 3258; fax +386 1 423 1569

electronic address: luka.sustersic@ijs.si

Jozef Stefan Institute, p.p. 3000, 1001 Ljubljana, Slovenia

Received 4 October 2000; revised manuscript received 8 May 2001
Accepted 5 September 2001

Generalizing the 't Hooft and Veltman method of unitary regulators, we demonstrate for the first time the existence of local, Lorentz-invariant, physically motivated Lagrangians of quantum-electrodynamic phenomena such that: (i) Feynman diagrams are finite and equal the diagrams of QED but with regularized propagators. (ii) n-point Green functions are C-, P- and T-invariant up to a phase factor, Lorentz-invariant and causal. (iii) No auxiliary particles or parameters are introduced.

PACS numbers: 12.20.-m, 11.10.Gh
UDC 537.8, 538.11
Keywords: quantum-electrodynamic Lagrangians, 't Hooft-Veltman method of unitary regulators, regularized propagators, causal n-point Green functions, S-matrix
Copyright by The Croatian Physical Society
For problems or questions please contact fizika@fizika.hfd.hr