Operator construction of ghost g-vacuum, handle operator and BRST-invariant multiloop amplitude of the bosonic string

Ursula Carow-Watamura, Zyun F. Ezawa, Akinori Tezuka, Satoshi Watamura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Applying the Feynman-like rules in the operator formalism with bosonized bc-ghost, we construct the g-loop, N-string vertex out of three-string vertices and propagators. The measure factor is analyzed in detail. It is shown that a part of the ghost contribution can be represented by using g 2-differential cand Riemann constants. The resulting measure factor is represented by the ghost g-vacuum with the b-ghost insertion accompanied by a contour integration. This contour integration can be performed explicitly in the one-loop case, in which we reproduce the well-known formula of the one-loop N-tachyon amplitude.

Original languageEnglish
Pages (from-to)299-306
Number of pages8
JournalPhysics Letters B
Volume221
Issue number3-4
DOIs
Publication statusPublished - 1989 May 4

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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