On field theories with an infinite number of fields

N. Itzhaki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A toy model with an infinite number of interacting fermions in four-dimensional space-time is analyzed. We find that the model is finite at any order in perturbation theory. However, perturbation theory is valid only for external momenta smaller than λ-1/2, where λ is the coupling constant.

Original languageEnglish
Pages (from-to)625-634
Number of pages10
JournalInternational Journal of Modern Physics A
Issue number4
StatePublished - 10 Feb 1998


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