String loop corrections to beta functions

Curtis Gove Callan, C. Lovelace, C. R. Nappi, S. A. Yost

Research output: Contribution to journalArticlepeer-review

289 Scopus citations


We study the problem of finding the beta functions, and the associated spacetime effective action, for interacting open and closed strings propagating in background fields. String loop divergences play a crucial role in this problem. Cancelling them against sigma model divergences gives a consistent set of loop-corrected beta functions, which can be derived from a simple generalization of the string-tree-level effective action. This suggests the existence of new string theories which are conformally invariant only after all world sheets have been summed.

Original languageEnglish (US)
Pages (from-to)525-550
Number of pages26
JournalNuclear Physics, Section B
Issue numberC
StatePublished - 1987

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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