Results 111 to 120 of about 5,303 (156)

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

Recent Developments in String Theory [PDF]

, 1997
After briefly reviewing basic concepts of perturbative string theory, we explain in simple terms some of the new findings that created excitement among the string physicists.
Lerche, W.
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

Upper bound on the Atiyah-Singer index from tadpole cancellation

Journal of High Energy Physics
We propose an upper bound on the Atiyah-Singer index in the effective action of string theory. For E 8 × E 8 ′ $$ {E}_8^{\prime } $$ and SO(32) heterotic string theories on smooth Calabi-Yau threefolds with line bundles, we find that the tadpole ...
Keiya Ishiguro, Takafumi Kai, Satsuki Nishimura, Hajime Otsuka, Maki Takeuchi   +4 more
doaj   +1 more source

Recent developments in superstring theory. [PDF]

Proc Natl Acad Sci U S A, 1998
Schwarz JH.
europepmc   +1 more source

Brane Effective Actions, Kappa-Symmetry and Applications. [PDF]

Living Rev Relativ, 2012
Simón J.
europepmc   +1 more source

Positivity of the Veneziano amplitude in ten dimensions

Journal of High Energy Physics
The Veneziano amplitude describing the tree-level scattering of four open superstrings is expected to be consistent with unitarity in ten spacetime dimensions.
Gareth Mansfield
doaj   +1 more source

On unitarity of the hypergeometric amplitude

Journal of High Energy Physics
The hypergeometric amplitude is a one-parameter deformation of the Veneziano amplitude for four-point tachyon scattering in bosonic string theory that is consistent with S-matrix bootstrap constraints.
Gareth Mansfield, Marcus Spradlin
doaj   +1 more source

Gravitational supervertices in n=1, 4D superstrings

, 1987
S. Cecotti, S. Ferrara, L. Girardello
semanticscholar   +1 more source