CP and other gauge symmetries in string theory

Michael Dine, Robert G. Leigh, Douglas A. MacIntire

Research output: Contribution to journalArticlepeer-review


We argue that CP is a gauge symmetry in string theory. As a consequence, CP cannot be explicitly broken either perturbatively or nonperturbatively; there can be no nonperturbative CP-violating parameters. String theory is thus an example of a theory where all θ angles arise due to spontaneous CP violation, and are in principle calculable.

Original languageEnglish (US)
Pages (from-to)2030-2032
Number of pages3
JournalPhysical review letters
Issue number14
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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