Results 91 to 100 of about 5,303 (156)

Open Heterotic Strings

, 2005
We classify potential cosmic strings according to the topological charge measurable outside the string core. We conjecture that in string theory it is this charge that governs the stability of long strings.
A. Sen, A. Sen, A.D. Sakharov, D.B. Fairlie, E. Witten, E.J. Copeland, J.A. Harvey, J.C. Baez, Joseph Polchinski, K. Becker, K. Olsen, M.J. Duff, N. Arkani-Hamed, N. Moeller, S.H. Shenker, T. Banks, T.W.B. Kibble, V.A. Rubakov   +17 more
core   +2 more sources

Two-Loop Superstrings in Hyperelliptic Language I: the Main Results [PDF]

, 2002
Following the new gauging fixing method of D'Hoker and Phong, we study two-loop superstrings in hyperelliptic language. By using hyperelliptic representation of genus 2 Riemann surface we derive a set of identities involving the Szeg\"o kernel.
Atick, Bershadsky, Bonini, Chuan-Jie Zhu, D'Hoker, D'Hoker, D'Hoker, D'Hoker, D'Hoker, D'Hoker, Gava, Green, Green, Green, Green, Green, Green, Gross, Iengo, Iengo, Iengo, Iengo, Jun-Bao Wu, Kiritsis, Knizhnik, Lebedev, Lechtenfeld, Lechtenfeld, Martinec, Moore, Morozov, Morozov, Morozov, Morozov, Schwarz, Stieberger, Stieberger, Verlinde, Zheng, Zheng, Zhu, Zhu, Zhu-Jun Zheng   +42 more
core   +2 more sources

Twistor--like Formulation of the Supermembrane in D=11 $^*$

, 1993
We propose a new formulation of the D=11 supermembrane theory that involves commuting spinors (twistor--like variables) and exhibits a manifest $n$--extended world volume supersymmetry $(1\leq n\leq 8)$.
Achúcarro, Aoyama, Bandos, Bandos, Bengtsson, Bengtsson, Bergshoeff, Bergshoeff, Bergshoeff, Berkovits, Berkovits, Berkovits, Berkovits, Berkovits, Berkovits, Bonora, Bonora, Bonora, Chikalov, de Azcarraga, Delduc, Delduc, Delduc, Delduc, Delduc, Duff, Duff, Eisemberg, Eisenberg, Farlie, Ferber, Galperin, Galperin, Gauntlett, Howe, Ivanov, M. Tonin, P. Pasti, Paccanoni, Pashnev, Plyushchay, Shirafuji, Soroka, Sorokin, Sorokin, Sorokin, Tonin, Tonin, Townsend, Townsend, Volkov, Volkov, Witten   +52 more
core   +1 more source

Modular graph functions and odd cuspidal functions. Fourier and Poincaré series

Journal of High Energy Physics, 2019
Modular graph functions are SL(2, ℤ)-invariant functions associated with Feynman graphs of a two-dimensional conformal field theory on a torus of modulus τ. For one-loop graphs they reduce to real analytic Eisenstein series. We obtain the Fourier series,
Eric D’Hoker, Justin Kaidi
doaj   +1 more source

On unitarity of tree-level string amplitudes

Journal of High Energy Physics, 2022
Four-particle tree-level scattering amplitudes in string theory are magically consistent with unitarity, reflected in the non-trivial fact that beneath the critical dimension, the residues of the amplitudes on massive poles can be expanded in partial ...
Nima Arkani-Hamed, Lorenz Eberhardt, Yu-tin Huang, Sebastian Mizera   +3 more
doaj   +1 more source

One-loop monodromy relations on single cuts

Journal of High Energy Physics, 2017
The discovery of colour-kinematic duality has led to significant progress in the computation of scattering amplitudes in quantum field theories. At tree level, the origin of the duality can be traced back to the monodromies of open-string amplitudes ...
Alexander Ochirov, Piotr Tourkine, Pierre Vanhove   +2 more
doaj   +1 more source

Superstring amplitudes from BCJ numerators at one loop

Journal of High Energy Physics
We find a direct map that determines moduli-space integrands for one-loop superstring amplitudes in terms of field-theory loop integrands in the BCJ form. The latter can be computed using efficient unitarity methods, so our map provides an alternative to
Yvonne Geyer, Jiachen Guo, Ricardo Monteiro, Lecheng Ren   +3 more
doaj   +1 more source

Superstring amplitudes from the field-theory limit: an n-point map at one loop

Journal of High Energy Physics
Are perturbative superstring amplitudes for massless external states just an α ′ dressing of super-Yang-Mills/supergravity? This is the case at tree level, where the worldsheet correlators at n points can be written in a natural worldsheet basis, such ...
Ricardo Monteiro, Lecheng Ren
doaj   +1 more source

Recent developments in non-perturbative quantum field theory [PDF]

, 1996
We report on recent advances in the understanding of non-perturbative phenomena in the quantum theory of fields and strings.Comment: 6 pages, latex, uses stwol.sty; Plenary talk given at International Conference on High Energy Physics (ICHEP), Warsaw ...
Ferrara, Sergio
core   +1 more source

Duality, Strings and Supergravity: a Status Report [PDF]

, 1997
We will report on recent advances in the understanding of non-perturbative interconnections between different string dualities. Weak-strong coupling duality (S-duality) and T-duality (symmetry under compactification on dual tori) allows one to compare ...
Ferrara, Sergio
core   +1 more source