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[en] We study the energy momentum tensor in the Bogolyubov-Epstein-Glaser approach to perturbation theory. It is found to be locally conserved for a class of theories containing no derivated fields in the interaction. For the massless φ4-theory we derive the trace anomaly of the improved tensor. (orig.)
Source
Dec 2000; 26 p; HEP-TH--0009124; ISSN 0418-9833; 
; Available from TIB Hannover: RA 2999(00-176)
; Available from TIB Hannover: RA 2999(00-176)