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pro vyhledávání: '"Berkovits, Nathan"'
Autor:
Berkovits, Nathan
A new manifestly spacetime-supersymmetric prescription for superstring amplitude computations is given using the pure spinor formalism which does not contain subtleties from poles in the pure spinor ghosts. This super-Poincare covariant prescription
Externí odkaz:
http://arxiv.org/abs/2411.19778
Autor:
Berkovits, Nathan, Pitombo, Rodrigo S.
Four-dimensional Chern-Simons (4DCS) theory is useful for understanding integrable sigma-models and constructing new ones. In this paper, we show how to derive the complete pure spinor $AdS_5\times S^5$ superstring sigma-model from 4DCS theory with d
Externí odkaz:
http://arxiv.org/abs/2401.03976
The recently established B-RNS-GSS formalism is extended for the description of the heterotic superstring in curved backgrounds. We propose a generalized action and BRST charge defined in the small Hilbert space with the standard form of an $\mathcal
Externí odkaz:
http://arxiv.org/abs/2211.06899
Autor:
Berkovits, Nathan
The physical states of D=5 holomorphic Chern-Simons theory correspond to on-shell D=10 open superstring states in the cohomology of $q_+$, where $q_+$ is one of the 16 spacetime supersymmetry generators. Scattering amplitudes of these states can be c
Externí odkaz:
http://arxiv.org/abs/2211.06731
Autor:
Berkovits, Nathan, Mafra, Carlos R.
The pure spinor formalism for the superstring has the advantage over the more conventional Ramond-Neveu-Schwarz formalism of being manifestly spacetime supersymmetric, which simplifies the computation of multiparticle and multiloop amplitudes and all
Externí odkaz:
http://arxiv.org/abs/2210.10510
The purpose of this White Paper is to review recent progress towards elucidating and evaluating string amplitudes, relating them to quantum field theory amplitudes, applying their predictions to string dualities, exploring their connection with gravi
Externí odkaz:
http://arxiv.org/abs/2203.09099
Open superstring field theory admits a "hybrid" formulation where N = 1 D = 4 supersymmetry is manifest for Calabi-Yau compactifications to four dimensions. Using this formulation, the half-BPS instanton solution of four-dimensional super-Yang-Mills
Externí odkaz:
http://arxiv.org/abs/2110.07645
Constructing a consistent four-dimensional Lagrangian for charged massive higher-spin fields propagating in an electromagnetic background is an open problem. In 1989, Argyres and Nappi used bosonic open string field theory to construct a Lagrangian f
Externí odkaz:
http://arxiv.org/abs/2110.07623
Autor:
Berkovits, Nathan
The algebra of spacetime supersymmetry generators in the RNS formalism for the superstring closes only up to a picture-changing operation. After adding non-minimal variables and working in the "large" Hilbert space, the algebra closes without picture
Externí odkaz:
http://arxiv.org/abs/2106.04448
After constructing a simplified four-dimensional version of the b ghost, topological multiloop amplitudes in type II superstring theory compactified on a six-dimensional orbifold are computed using the non-minimal pure spinor formalism. These pure sp
Externí odkaz:
http://arxiv.org/abs/1910.10511