BRST quantisation of the N = 2 string in a real spacetime structure
Hong Lu,Carey Pope +1 more
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In this article, the authors studied the N = 2 string with a real structure on the (2,2) spacetime, using BRST methods, and several new features emerged, such as the three-point interactions of all physical operators leading to three different types of amplitudes, which can be effectively described by the interactions of a scalar NS operator and a bosonic spinorial R operator.About:
This article is published in Nuclear Physics.The article was published on 1995-08-07 and is currently open access. It has received 10 citations till now. The article focuses on the topics: Operator theory & Quasinormal operator.read more
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Extended self-dual Yang-Mills from the N=2 string
TL;DR: In this paper, the authors show that the physical degrees of freedom of the critical open string with N = 2 superconformal symmetry on the worldsheet are described by a self-dual Yang-Mills field on a hyperspace parametrised by the coordinates of the target space R2,2 together with a commuting chiral spinor.
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Path-Integral Quantization of the (2,2) String ∗
Jan Bischoff,Olaf Lechtenfeld +1 more
TL;DR: In this paper, a complete treatment of the (2,2) NSR string in flat (2 + 2)-dimensional space-time is given, from the formal path integral over N = 2 super Riemann surfaces to the computational recipe for amplitudes at any loop or gauge instanton number.
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The string measure and spectral flow of critical N = 2 strings
Sergei V. Ketov,Olaf Lechtenfeld +1 more
TL;DR: In this paper, the general structure of N = 2 moduli space at arbitrary genus and instanton number is investigated, yielding picture-and U(1) ghost number-changing operator insertions.
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Restoring reality for the self-dual N = 2 string
Jan Bischoff,Olaf Lechtenfeld +1 more
TL;DR: In this article, a tree-level three-point amplitude invariant SO (2, 2) invariant self-dual gravity scalar is presented. But the invariant tree level three point amplitude is not invariant to non-covariant non-Lorentz scalars, since it requires the choice of a complex structure.
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N=2 Worldsheet Instantons Yield Cubic Self-Dual Yang-Mills
Olaf Lechtenfeld,Warren Siegel +1 more
TL;DR: In this article, the breaking of SO(2,2) Lorentz symmetry in R 2,2 is parametrized by a spacetime twistor containing the string coupling and theta angle.
References
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Conformal invariance, supersymmetry and string theory
TL;DR: In this article, the BRST method is used to covariantly quantize superstrings, and in particular to construct the vertex operators for string emission as well as the supersymmetry charge.
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Geometry of N=2 strings
Hirosi Ooguri,Cumrun Vafa +1 more
TL;DR: In this paper, the geometrical aspects of the vacua and their relation to twistor space, W∞, harmonic superspace and the superstring world-sheet are discussed.
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Self-duality and n=2 string magic
Hirosi Ooguri,Cumrun Vafa +1 more
TL;DR: In this paper, the authors consider strings with an N = 2 local superconformal symmetry on the worldsheet and show that a Kahler function giving rise to self-dual gravity is the only physical degree of freedom of this theory.
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The GSO projection, BRST cohomology and picture-changing in N = 2 string theory☆
TL;DR: In this paper, the critical N = 2 fermionic string with and without a global Z 2 twist is investigated, and the corresponding chiral BRST-invariant vertex operators are constructed in certain pictures, and their fusion and picture-changing are investigated.
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The Complete Cohomology of the W3 String
TL;DR: In this paper, a simple procedure for constructing the complete cohomology of the BRST operator of the two-scalar and multiscalar $W_3$ strings is presented.