The GSO projection, BRST cohomology and picture-changing in N = 2 string theory
- verfasst von
- 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.
- Organisationseinheit(en)
-
Institut für Theoretische Physik
- Typ
- Artikel
- Journal
- Nuclear Physics, Section B
- Band
- 438
- Seiten
- 373-409
- Anzahl der Seiten
- 37
- ISSN
- 0550-3213
- Publikationsdatum
- 27.03.1995
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Kern- und Hochenergiephysik
- Elektronische Version(en)
-
https://doi.org/10.1016/0550-3213(94)00536-N (Zugang:
Unbekannt)
