Conformal supergravity in twistor-string theory

Nathan Berkovits, Edward Witten

Research output: Contribution to journalArticlepeer-review

171 Scopus citations


Conformal supergravity arises in presently known formulations of twistor-string theory either via closed strings or via gauge-singlet open strings. We explore this sector of twistor-string theory, relating the relevant string modes to the particles and fields of conformal supergravity. We use the twistor-string theory to compute some tree level scattering amplitudes with supergravitons. Since the supergravitons interact with the same coupling constant as the Yang-Mills fields, conformal supergravity states will contribute to loop amplitudes of Yang-Mills gluons in these theories. Those loop amplitudes will therefore not coincide with the loop amplitudes of pure super Yang-Mills theory.

Original languageEnglish (US)
Pages (from-to)197-232
Number of pages36
JournalJournal of High Energy Physics
Issue number8
StatePublished - Aug 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Classical Theories of Gravity
  • Superstrings and Heterotic Strings
  • Topological Strings


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