Results 1 to 10 of about 15,915 (158)

SPACE-TIME VARIABLE SUPERSTRING VACUA (CALABI-YAU COSMIC YARN) [PDF]

International Journal of Modern Physics A, 1994
In a general superstring vacuum configuration, the ‘internal’ space (sector) varies in spacetime. When this variation is non-trivial only in two space-like dimensions, the vacuum contains static cosmic strings with finite energy per unit length and which ...
Paul S. Green, Tristan Hübsch
semanticscholar   +9 more sources

Top-quark mass coupling and classification of weakly coupled heterotic superstring vacua [PDF]

The European Physical Journal C, 2014
The quest for the Standard Model among the huge number of string vacua is usually based on a set of phenomenological criteria related to the massless spectrum of string models.
J. Rizos
semanticscholar   +7 more sources

Superstring cosmology for N₄ = 1 → 0 superstring vacua [PDF]

Fortschritte der Physik, 2011
We study the cosmology of perturbative heterotic superstring theory during the radiation‐like era for semi‐realistic backgrounds with initial 𝒩 = 1 supersymmetry.
John Estes, Costas Kounnas, Hervé Partouche   +2 more
semanticscholar   +8 more sources

Top mass and classification of heterotic superstring vacua [PDF]

Proceedings of Proceedings of the Corfu Summer Institute 2011 — PoS(CORFU2011), 2012
We consider a class of Z2 ×Z2 heterotic superstring vacua, characterised by SO(10) gauge symmetry broken to the Pati–Salam gauge group, SU(4)×SU(2)L ×SU(2)R, by the use of a discrete Wilson line.
J. Rizos
semanticscholar   +3 more sources

Critical superstring vacua from noncritical manifolds: A novel framework for string compactification and mirror symmetry [PDF]

Physical Review Letters, 1993
A new framework is found for the compactification of supersymmetric string theory. It is shown that the massless spectra of critical string vacua with central charge [ital c]=3[ital D][sub crit] can be derived from manifolds of complex dimension [ital D][
Rolf Schimmrigk
semanticscholar   +7 more sources

The “landscape” of Pati–Salam heterotic superstring vacua [PDF]

Fortschritte der Physik, 2010
The main aspects of a recently developed method for classification of heterotic superstring vacua in the Free Fermionic Formulation are presented. Using these techniques we classify a big number of approximately 1015 heterotic string vacua with Pati ...
J. Rizos
semanticscholar   +8 more sources

Flux Vacua and Branes of the Minimal Superstring [PDF]

Journal of High Energy Physics, 2005
We analyze exactly the simplest minimal superstring theory, using its dual matrix model. Its target space is one dimensional (the Liouville direction), and the background fields include a linear dilaton, a possible tachyon condensate, and RR flux.
Nathan Seiberg, David Shih
semanticscholar   +6 more sources

Superstring Vacua of 4-dimensional PP-Waves with Enhanced Supersymmetry [PDF]

Journal of High Energy Physics, 2002
We study the superstring vacua constructed from the conformal field theories of the type H4 ? , where H4 denotes the super Nappi-Witten model (super WZW model on the 4-dimensional Heisenberg group H4) and denotes an arbitrary = 2 rational superconformal ...
Yasuaki Hikida, Yuji Sugawara
semanticscholar   +5 more sources

Explicit superstring vacua in a background of gravitational waves and dilaton [PDF]

Il Nuovo Cimento A, 1995
SummaryWe present an explicit solution of superstring effective equations, represented by gravitational waves and dilaton backgrounds. Particular solutions will be examined in a forthcoming note.
A. Peterman, A. Zichichi
semanticscholar   +5 more sources

A search for exact superstring vacua [PDF]

, 1993
SummaryWe investigate 2d σ-models with a (2 +N)-dimensional Minkowski signature target space metric and Killing symmetry, specifically supersymmetrized, and see under which conditions they might lead to corresponding exact string vacua.
A. Petermann, A. Zichichi
openalex   +2 more sources