Results 91 to 100 of about 570 (144)

Amplitudes on plane waves from ambitwistor strings

Journal of High Energy Physics, 2017
In marked contrast to conventional string theory, ambitwistor strings remain solvable worldsheet theories when coupled to curved background fields. We use this fact to consider the quantization of ambitwistor strings on plane wave metric and plane wave ...
Tim Adamo, Eduardo Casali, Lionel Mason, Stefan Nekovar   +3 more
doaj   +1 more source

Model-building for fractional superstrings

, 1992
We investigate heterotic string-type model-building for the recently proposed fractional superstring theories. We concentrate on the cases with critical space-time dimensions four and six, and find that a correspondence can be drawn between the new ...
Henry Tye, S. H., Dienes, Keith R.
core   +1 more source

Fermionic T-duality and U-duality in type II supergravity

, 2011
PhDThis thesis deals with the two duality symmetries of N = 2 D = 10 supergravity theories that are descendant from the full superstring theory: fermionic T-duality and U-duality.
Bakhmatov, Ilya
core  

Rounding out the story of higher derivative consistent truncations

Journal of High Energy Physics
At the two-derivative order, the group manifold reduction of heterotic supergravity on S 3 results in a half-maximal 7D gauged supergravity coupled to three vector multiplets, and a further truncation can be taken to remove the vector multiplets.
James T. Liu, Robert J. Saskowski
doaj   +1 more source

Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection

, 2004
23 pages; v2: minor changes, references added, version to appear in JHEPWe show that a Goedel-like deformation of AdS3 in heterotic string theory can be realized as an exact string background.
Israël, Dan
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The physical moduli of heterotic G 2 string compactifications

Journal of High Energy Physics
In previous works, an operator was developed for heterotic compactifications on ℝ2,1 × G 2 and AdS 3 × G 2, which preserves N = 1 d = 3 supersymmetry and whose kernel is related to the moduli of the compactification. The operator is described in terms of
Jock McOrist, Martin Sticka, Eirik Eik Svanes   +2 more
doaj   +1 more source

Inverse of the string theory KLT kernel

Journal of High Energy Physics, 2017
The field theory Kawai-Lewellen-Tye (KLT) kernel, which relates scattering amplitudes of gravitons and gluons, turns out to be the inverse of a matrix whose components are bi-adjoint scalar partial amplitudes.
Sebastian Mizera
doaj   +1 more source

Brane-World Gravity [PDF]

, 2010
The observable universe could be a 1+3-surface (the “brane”) embedded in a 1+3+d-dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Roy Maartens, Kazuya Koyama, Maartens, Roy, Koyama, Kazuya   +3 more
core   +1 more source

Towards the underlying gauge theory of the pure spinor superstring

Journal of High Energy Physics, 2019
Previous attempts to determine the worldsheet origin of the pure spinor for­malism were not completely successful, but introduced important concepts that seem to be connected to its fundamental structure, e.g., emergent supersymmetry and the role of ...
Renann Lipinski Jusinskas
doaj   +1 more source

Cosmic necklaces in string theory and field theory

, 2010
PhDIn this thesis we investigate astrophysical phenomena which arise in models with compact extra dimensions, focussing on the cosmological consequences of strings which wrap cycles in the internal space. Embedding our strings in the Klebanov-Strassler
Lake, Matthew James
core