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
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A Note on Toroidal Compactifications of the Type I Superstring and Other Superstring Vacuum Configurations with 16 Supercharges [PDF]
Nucl.Phys.B528:73-94,1998, 1997 We show that various disconnected components of the moduli space of superstring vacua with 16 supercharges admit a rationale in terms of BPS un-orientifolds, i.e.
Alessandrini +60 more
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On R^4 terms and MHV amplitudes in N = 5,6 supergravity vacua of Type II superstrings [PDF]
arXiv, 2010 We compute one-loop threshold corrections to R^4 terms in N= 5,6 supergravity vacua of Type II superstrings. We then discuss non-perturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level in N = 5, 6 supergravities.
Massimo Bianchi
arxiv +3 more sources
Symmetries on the Space of (2, 2) Superstring Vacua and Automorphism Groups of Calabi-Yau Manifolds [PDF]
, 2013 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 ...
Amit Giveon, Dirk-Jan Smit
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Geometrical Construction of Type I Superstring Vacua [PDF]
arXiv, 1997 The parameter-space orbifold construction of open and unoriented toroidal and (target-space) orbifold compactifications is briefly reviewed, with emphasis on the underlying geometrical framework. A class of chiral four-dimensional type-I vacua with three generations is also discussed.
Gianfranco Pradisi
arxiv +4 more sources
Stable Non-Supersymmetric Vacua in the Moduli Space of Non-Critical Superstrings [PDF]
Nucl.Phys.B759:20-49,2006, 2006 We study a set of asymmetric deformations of non-critical superstring theories in various dimensions. The deformations arise as Kaehler and complex structure deformations of an orthogonal two-torus comprising of a parallel and a transverse direction in the near-horizon geometry of NS5-branes.
Troels Harmark +2 more
arxiv +3 more sources
Top mass and classification of heterotic superstring vacua [PDF]
, 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
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Marginal Deformations of Vacua with Massive boson-fermion Degeneracy Symmetry [PDF]
Nucl.Phys.B834:273-315,2010, 2010 Two-dimensional string vacua with Massive Spectrum boson-fermion Degeneracy Symmetry (MSDS) are explicitly constructed in Type II and Heterotic superstring theories.
Florakis, Ioannis +2 more
core +3 more sources
Phys.Lett.B651:239-245,2007, 2007 We argue that tachyon-free type I string vacua with supersymmetry breaking in the open sector at the string scale can be interpreted, via S and T-duality arguments, as metastable vacua of supersymmetric type I superstring. The dynamics of the process can
Abe +64 more
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Conflicts with de Sitter Vacua in Superstring Theory
McGill Science Undergraduate Research JournalModels of our universe lack consistency at different energy scales, so we require a theory with ultraviolet (UV) completion such as string theory. A suitable candidate to model our universe in this framework is de Sitter space, a spacetime which expands ...
J. Morais
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