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. In this work we study criteria associated with interactions in the effective low energy theory and in particular with the presence of the coupling that provides mass to the top ...
J. Rizos
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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 c=3${\mathit{D}}_{\mathrm{crit}}$ can be derived from manifolds of complex dimension ${\mathit{D}}_{\mathrm{crit}}$+2(Q-1),Q\ensuremath{\ge}1, whose first Chern class is quantized in a ...
Rolf Schimmrigk
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Stable non-supersymmetric vacua in the moduli space of non-critical superstrings [PDF]
Nuclear Physics B, 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
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Anomalous U(1)s in Type I superstring vacua [PDF]
Nuclear Physics B, 2002 We perform a systematic string computation of the masses of anomalous U(1) gauge bosons in four-dimensional orientifold vacua, and we study their localization properties in the internal (compactified) space. We find that N=1 supersymmetric sectors yield four-dimensional contributions, localized in the whole six-dimensional internal space, while N=2 ...
I. Antoniadis, Elias Kiritsis, J. Rizos
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Stability of vacua and domain walls in supergravity and superstring theory [PDF]
AIP Conference Proceedings, 1992 6 pages, UPR-529 ...
Mirjam Cvetič
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New N=1 supersymmetric 3-dimensional superstring vacua from U-manifolds [PDF]
Physics Letters B, 1998 12 pages ...
Gottfried Curio, Dieter Lüst
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Classification of flat directions in perturbative heterotic superstring vacua with anomalous U(1) [PDF]
Nuclear Physics B, 1998 26 ...
Gerald Cleaver +4 more
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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 H_4 x M, where H_4 denotes the super Nappi-Witten model (super WZW model on the 4-dimensional Heisenberg group H_4) and M denotes an arbitrary N=2 rational superconformal field theory with c=9.
Yasuaki Hikida, Yuji Sugawara
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On
Advances in High Energy Physics, 2011 We compute one-loop threshold corrections toℛ4terms inN=5,6supergravity vacua of Type II superstrings. We then discuss nonperturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level inN=5,6supergravities.
Massimo Bianchi
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Geometrical Construction of Type I Superstring Vacua
, 1997 12 pages, latex, no figures; contribution to the Proceedings of the 12th Italian Conference on General Relativity and Gravitational Physics, Rome, september 23-27 ...
Gianfranco Pradisi
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