The GSO projection, BRST cohomology and picture-changing in N = 2 string theory
- authored by
- Jan Bischoff, Sergei V. Ketov, Olaf Lechtenfeld
- Abstract
We investigate in detail the critical N = 2 fermionic string with and without a global Z2 twist. An analysis of BRST cohomology shows that twisted sectors contain massless 'spacetime' fermions which are non-local with respect to the standard massless boson. However, two distinct GSO projections exist, one (untwisted) retaining merely the usual boson and its spectral-flow partner, the other (twisted) yielding two fermions and one boson, on the massless level. The corresponding chiral BRST-invariant vertex operators are constructed in certain pictures, and their fusion and picture-changing are investigated, including the construction of inverse picture-changing operators. The N = 2 'spacetime supersymmetry' generators are null operators, since the twisted massless states fail to interact. The untwisted three- and four-point functions are recalculated at tree-level.
- Organisation(s)
-
Institute of Theoretical Physics
- Type
- Article
- Journal
- Nuclear Physics, Section B
- Volume
- 438
- Pages
- 373-409
- No. of pages
- 37
- ISSN
- 0550-3213
- Publication date
- 27.03.1995
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Electronic version(s)
-
https://doi.org/10.1016/0550-3213(94)00536-N (Access:
Unknown)
