On the N=2 Superstring Brst Operator
نویسنده
چکیده
We show that the BRST charge for the N=2 superstring system can be written as Q = e −R (dz 2πi bγ + γ −)e R , where b and γ ± are super-reparametrizations ghosts. This provides a trivial proof of the nilpotence of this operator.
منابع مشابه
New BRST Charges in RNS Superstring Theory and Deformed Pure Spinors
We show that new BRST charges in RNS superstring theory with nonstandard ghost numbers, constructed in our recent work, can be mapped to deformed pure spinor (PS) superstring theories, with the nilpotent pure spinor BRST charge QPS = ∮ λdα still retaining its form but with singular operator products between commuting spinor variables λ. Despite the OPE singularities, the pure spinor condition λ...
متن کاملOn the BRST Cohomology of Superstrings with/without Pure Spinors
We replace our earlier condition that physical states of the superstring have non-negative grading by the requirement that they are analytic in a new real commuting constant t which we associate with the central charge of the underlying Kac-Moody superalgebra. The analogy with the twisted N=2 SYM theory suggests that our covariant superstring is a twisted version of another formulation with an ...
متن کاملCovariant Quantization of the Superstring
After reviewing the Green-Schwarz superstring using the approach of Siegel, the su-perstring is covariantly quantized by constructing a BRST operator from the fermionic constraints and a bosonic pure spinor ghost variable. Physical massless vertex operators are constructed and, for the first time, N-point tree amplitudes are computed in a manifestly ten-dimensional super-Poincaré covariant mann...
متن کاملA New Approach to the Green-schwarz Superstring
By replacing two of the bosonic scalar superfields of the N=2 string with fermionic scalar superfields (which shifts d critical from (2,2) to (9,1)), a quadratic action for the ten-dimensional Green-Schwarz su-perstring is obtained. Using the usual N=2 super-Virasoro ghosts, one can construct a BRST operator, picture-changing operators, and covariant vertex operators for the Green-Schwarz super...
متن کاملTen-Dimensional Supergravity Constraints from the Pure Spinor Formalism for the Superstring
It has recently been shown that the ten-dimensional superstring can be quantized using the BRST operator Q = ∮ λdα where λ α is a pure spinor satisfying λγλ = 0 and dα is the fermionic supersymmetric derivative. In this paper, the pure spinor version of superstring theory is formulated in a curved supergravity background and it is shown that nilpotency and holomorphicity of the pure spinor BRST...
متن کامل