Closed string-open string transitions and Witten's string field theory

Joel A. Shapiro, Charles B. Thorn

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Using conformal mapping techniques, we obtain a new BRST invariant operator Υ{hooked} encoding in closed form transition amplitudes between open strings and closed strings. The residues of the closed string poles in the non-planar one-loop two-point diagram of Witten's string field theory are finite sums of products of these amplitudes.

Original languageEnglish (US)
Pages (from-to)43-48
Number of pages6
JournalPhysics Letters B
Issue number1
StatePublished - Jul 30 1987

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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