Results 1 to 10 of about 9,239 (185)
Superstring cosmology for N_4 = 1 -> 0 superstring vacua [PDF]
Fortschritte der Physik, 2010 AbstractWe study the cosmology of perturbative heterotic superstring theory during the radiation‐like era for semi‐realistic backgrounds with initial 𝒩 = 1 supersymmetry. This analysis is valid for times after the Hagedorn era (or alternatively inflation era) but before the electroweak symmetry breaking transition.
John E. Estes +2 more
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A search for exact superstring vacua [PDF]
Il Nuovo Cimento A, 1994 We investigate $2d$ sigma-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. It appears that the issue relies heavily on the properties of the vector $M_ $, a reparametrization term, which needs ...
A. Peterman, A. Zichichi
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The “landscape” of Pati–Salam heterotic superstring vacua [PDF]
Fortschritte der Physik, 2010 AbstractThe 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–Salam, SU(4) × SU(2)L × SU(2)R gauge symmetry with respect to their main phenomenological ...
J. Rizos
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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 space-time. When this variation is nontrivial only in two spacelike dimensions, the vacuum contains static cosmic strings with finite energy per unit length and which is, up to interactions with matter, an easily computed topological invariant.
Paul S. Green, Tristan Hübsch
core +7 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. The theory has both charged and neutral branes, and these exhibit new and surprising phenomena. The smooth
Nathan Seiberg, David Shih
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Bound-states of D-branes in L–R asymmetric superstring vacua [PDF]
Nuclear Physics B, 2008 22 ...
Massimo Bianchi
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Symmetries on the Space of (2, 2) Superstring Vacua and Automorphism Groups of Calabi-Yau Manifolds [PDF]
Progress of Theoretical Physics Supplement, 1990 Symmetry groups on the space of (2,2) string vacua for c = 3,6,9 are discussed in the context of orbifoldized Landau-Ginzburg theories. A general method for finding the maximal symmetry groups on the moduli space of untwisted marginal operators is presented, by studying symmetries on the resolution of isolated singularities of superpotentials ...
Amit Giveon, Dirk-Jan Smit
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Anomalies, dualities, and topology of D = 6 N = 1 superstring vacua [PDF]
Nuclear Physics B, 1996 We consider various aspects of compactifications of the Type I/heterotic $Spin(32)/\Z_2$ theory on K3. One family of such compactifications includes the standard embedding of the spin connection in the gauge group, and is on the same moduli space as the compactification of the heterotic $E_8\times E_8$ theory on K3 with instanton numbers (8,16 ...
Micha Berkooz +5 more
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AdS4flux vacua in type II superstrings and their domain-wall solutions [PDF]
Journal of High Energy Physics, 2007 Acknowledgment ...
Costas Kounnas +3 more
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Non-perturbative stability of supergravity and superstring vacua
Nuclear Physics B, 1993 25 pages NSF-ITP-92-84, UPR-494-T, YCTP-P44 ...
Mirjam Cvetič +2 more
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