Results 1 to 10 of about 32,512 (177)
The "landscape" of Pati--Salam heterotic superstring vacua [PDF]
, 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 $10^{15}$ heterotic string vacua with Pati-
Rizos, J.
core +6 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.
Rizos, J.
core +8 more sources
A search for exact superstring vacua [PDF]
arXiv, 1993 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
Petermann, A., Zichichi, A.
core +7 more sources
Superstring Vacua of 4-dimensional PP-Waves with Enhanced Supersymmetry [PDF]
JHEP 0210:067,2002, 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 ...
A. Giveon +43 more
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Nonperturbative Stability of Supergravity and Superstring Vacua [PDF]
Nucl.Phys.B389:3-24,1993, 1992 We investigate the possibility of false vacuum decay in $N=1$ supergravity theories. By establishing a Bogomol'nyi bound for the energy density stored in the domain wall of the $O(4)$ invariant bubble, we show that supersymmetric vacua remain absolutely stable against false vacuum decay into another supersymmetric vacuum.
Mirjam Cvetič +2 more
arxiv +4 more sources
New N=1 Supersymmetric 3-dimensional Superstring Vacua from U-manifolds [PDF]
Phys.Lett.B428:95-104,1998, 1998 Making use of non-perturbative U-duality symmetries of type II strings we construct new `superstring' vacua in three dimensions with N=1 supersymmetry. This has an interpretation as compactifying formally from 13 dimensions (S-theory) on Calabi-Yau 5-folds possessing a $T^3 \x T^2$ fibration.
Gottfried Curio, Dieter Lüst
arxiv +5 more sources
Superstring cosmology for N_4 = 1 -> 0 superstring vacua [PDF]
, 2010 We study the cosmology of perturbative heterotic superstring theory during the radiation-like era for semi-realistic backgrounds with initial $\N=1$ supersymmetry.
Albrecht +89 more
core +7 more sources
Spacetime Variable Superstring Vacua [PDF]
, 1993 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
Green, Paul S., Hubsch, Tristan
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Stability of Vacua and Domain Walls in Supergravity and Superstring Theory [PDF]
, 1992 We address the possibility of false vacuum decay in $N=1$ supergravity theories, including those corresponding to superstring vacua. By establishing a Bogomol'nyi bound for the energy density stored in the domain wall of the $O(4)$ invariant bubble, we show that supersymmetric vacua remain absolutely stable against false vacuum decay into another ...
Mirjam Cvetič
arxiv +4 more sources
Explicit supertring vacua in a background of gravitational waves and dilaton [PDF]
Nuovo Cim.A108:97-104,1995, 1994 We 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
arxiv +4 more sources