Journal ArticleDOI
Two-loop computation of the four-particle amplitude in heterotic string theory
Roberto Iengo,Chuan-Jie Zhu +1 more
Reads0
Chats0
TLDR
In this article, an integral formula for the four-massless-particle scattering amplitude at two loops in heterotic string theory has been derived by using the hyperelliptic formalism.About:
This article is published in Physics Letters B.The article was published on 1988-09-29. It has received 72 citations till now. The article focuses on the topics: Heterotic string theory & String duality.read more
Citations
More filters
Journal ArticleDOI
The quartic effective action of the heterotic string and supersymmetry
Eric Bergshoeff,M. de Roo +1 more
TL;DR: The supersymmetric quartic effective action for the heterotic string which follows from the supersymmetrization of the Yang-Mills and Lorentz Chern-Simons forms was presented in this paper.
Journal ArticleDOI
Multiloop amplitudes and vanishing theorems using the pure spinor formalism for the superstring
TL;DR: In this paper, a super-Poincare covariant prescription was defined for computing tree amplitudes and was shown to coincide with the standard RNS prescription, which was used to define functional integration over the pure spinor ghosts and to construct a suitable $b$ ghost.
Journal ArticleDOI
Two-loop superstrings VI Nonrenormalization theorems and the 4-point function ☆
Eric D'Hoker,Duong H. Phong +1 more
TL;DR: In this article, the N-point amplitudes for the type II and heterotic superstrings at two-loop order and for N ⩽ 4 massless NS bosons are evaluated explicitly from first principles, using the method of projection onto superperiod matrices introduced and developed in the first five papers.
Journal ArticleDOI
Two-loop superstrings.: I. Main formulas
Eric D'Hoker,Duong H. Phong +1 more
TL;DR: In this paper, a slice-independent formula for the two-loop superstring measure on moduli space for even spin structure is constructed from first principles using the super-period matrix as moduli invariant under worldsheet supersymmetry.
Journal ArticleDOI
Two-loop superstrings and S-duality
TL;DR: In this article, the two-loop contribution to the type IIB low energy effective action term D 4 R 4, predicted by SL ( 2, Z ) duality, is compared with that of the 2-loop 4-point function derived recently in superstring perturbation theory through the method of projection onto super period matrices.
References
More filters
Journal ArticleDOI
Multiloop calculations in covariant superstring theory
Erik Verlinde,Herman Verlinde +1 more
TL;DR: In this paper, the superstring multiloop amplitudes in terms of theta functions were constructed using BRST-invariance and it was shown that these poles have no physical effect for on-shell amplitudes, and that the partition functions is given by a total derivative on moduli space.
Journal ArticleDOI
Algebraic Geometry and the Geometry of Quantum Strings
Alexander Belavin,V.G. Knizhnik +1 more
TL;DR: In this paper, the p -loop amplitude of closed oriented bosonic strings in 26 dimensions is considered and the integration measure is a measure on the moduli space M p of Riemann surfaces of genus p.
Journal ArticleDOI
Contact Interactions in Superstring Theory
TL;DR: In this paper, contact terms are used to ensure analyticity of S-matrix elements in superstring theory in much the same way as with contact terms in ordinary field theories with point particles.
Journal ArticleDOI
Nonrenormalization theorems and fermionic string finiteness
TL;DR: In this paper, the vanishing of N-point string diagrams for N < 4 in flat ten-space, as well as the absence of corrections to the tree level superpotential in comapctification of N = 2 superconformal backgrounds, are discussed.
Journal ArticleDOI
Spin field correlators on an arbitrary genus Riemann surface and non-renormalization theorems in string theories
Joseph J. Atick,Ashoke Sen +1 more
TL;DR: In this article, the n-point correlation functions of spin fields on an arbitrary genus Riemann surface were calculated and the corresponding correlators for the spin fields associated with the local supersymmetry ghosts using a specific ansatz for screening the background ghost charge.