Vertex operators in background fields

Curtis Gove Callan, Z. Gan

Research output: Contribution to journalArticlepeer-review

132 Scopus citations


We show that vertex operators for strings propagating in background fields are composite operators of anomalous dimension two in a two-dimensional field theory defined on a curved world-sheet. We show how special features of renormalization theory in curved spacetime are responsible for a number of peculiar features of string physics, including the need for apparently unphysical fields to maintain gauge invariance in string field theory.

Original languageEnglish (US)
Pages (from-to)647-660
Number of pages14
JournalNuclear Physics, Section B
Issue number3-4
StatePublished - Aug 4 1986

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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