Are all TCFTs obtained by twisting N=2 SCFTs?

Details Are all TCFTs obtained by twisting N=2 SCFTs? Are all TCFTs obtained by twisting N=2 SCFTs?

1995-07-05

arxiv.org/abs/hep-th/9507024v2

Physics

High Energy Physics

High Energy Physics - Theory

9 pages (5 physical pages), .dvi.uu (+ some hyperlinks) added some references (my apologies)

Scientific paper

A large class of two-dimensional topological conformal field theories (TCFTs) are obtained by the twisting construction of Witten and Eguchi-Yang. However there seem to exist TCFTs which are not obtained in this way; for instance, TCFTs obtained from the Kazama algebra and critical string theories with generic background. We will show that by embedding the critical bosonic string into the NSR string, its TCFT can indeed be obtained by twisting a N=2 SCFT. A closer look at the construction of the N=2 superconformal algebra will show that the embedding is not essential, and this will tell us how to generalise this to other string theories. We thus conclude with the natural conjecture that _all_ TCFTs have a description as topologically twisted N=2 SCFTs. (Talk given at the Workshop on Strings, Gravity and Related Topics, held at the ICTP (Trieste, Italy) on 29-30 June, 1995.)

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