Super - Poincaré Covariant Two - Loop Superstring Amplitudes
نویسنده
چکیده
The super-Poincaré covariant formalism for the superstring is used to compute mass-less four-point two-loop amplitudes in ten-dimensional superspace. The computations are much simpler than in the RNS formalism and include both external bosons and fermions.
منابع مشابه
Equivalence of Two - Loop Superstring Amplitudes in the Pure Spinor and RNS Formalisms
The pure spinor formalism for the superstring has recently been used to compute massless four-point two-loop amplitudes in a manifestly super-Poincaré covariant manner. In this paper, we show that when all four external states are Neveu-Schwarz, the two-loop amplitude coincides with the RNS result.
متن کاملMultiloop Amplitudes and Vanishing Theorems using the Pure Spinor Formalism for the Superstring Nathan Berkovits
A ten-dimensional super-Poincaré covariant formalism for the superstring was recently developed which involves a BRST operator constructed from superspace matter variables and a pure spinor ghost variable. A super-Poincaré covariant prescription was defined for computing tree amplitudes and was shown to coincide with the standard RNS prescription. In this paper, picture-changing operators are u...
متن کاملMultiloop Amplitudes and Vanishing Theorems Using the Pure Spinor Formalism for the Superstring
A ten-dimensional super-Poincaré covariant formalism for the superstring was recently developed which involves a BRST operator constructed from superspace matter variables and a pure spinor ghost variable. A super-Poincaré covariant prescription was defined for computing tree amplitudes and was shown to coincide with the standard RNS prescription. In this paper, picture-changing operators are u...
متن کاملSuper - Poincaré Covariant Quantization of the Superstring
Using pure spinors, the superstring is covariantly quantized. For the first time, mass-less vertex operators are constructed and scattering amplitudes are computed in a manifestly ten-dimensional super-Poincaré covariant manner. Quantizable non-linear sigma model actions are constructed for the superstring in curved backgrounds, including the
متن کاملConsistency of Super - Poincaré Covariant Superstring Tree Amplitudes Nathan Berkovits
Using pure spinors, the superstring was recently quantized in a manifestly tendimensional super-Poincaré covariant manner and a covariant prescription was given for tree-level scattering amplitudes. In this paper, we prove that this prescription is cyclically symmetric and, for the scattering of an arbitrary number of massless bosons and up to four massless fermions, it agrees with the standard...
متن کامل