Results 1 to 10 of about 8,668 (82)

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.
John E. Estes, Costas Kounnas, Hervé Partouche   +2 more
core   +6 more sources

A search for exact superstring vacua [PDF]

, 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
A. Peterman, A. Zichichi
openalex   +3 more sources

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

, 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
openalex   +3 more sources

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-
J. Rizos
openalex   +3 more sources

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

, 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
openalex   +4 more sources

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

, 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 ...
Yasuaki Hikida, Yuji Sugawara
openalex   +3 more sources

Marginal Deformations of Vacua with Massive boson-fermion Degeneracy Symmetry [PDF]

, 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, Kounnas, Costas, Toumbas, Nicolaos   +2 more
core   +2 more sources

Metastable String Vacua [PDF]

, 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, Affleck, Affleck, Aganagic, Ahn, Ahn, Aldazabal, Alvarez-Gaumé, Amariti, Angelantonj, Angelantonj, Angelantonj, Angelantonj, Angelantonj, Antoniadis, Antoniadis, Argurio, Argurio, Bena, Bianchi, Blumenhagen, Blumenhagen, Braun, Braun, Carlo Angelantonj, Dimopoulos, Dine, Dixon, Dudas, Dudas, Dudas, Dudas, Dudas, Elitzur, Emilian Dudas, Eto, Fischler, Fischler, Forger, Forste, Franco, Franco, Garcia-Etxebarria, Ginsparg, Giveon, Hanany, Horava, Hyakutake, Intriligator, Kallosh, Lebedev, Luty, Nair, Ooguri, Ooguri, Pradisi, Ray, Sagnotti, Sagnotti, Schwarz, Sen, Sugimoto, Tatar, Uranga, Witten   +64 more
core   +3 more sources

A Note on Toroidal Compactifications of the Type I Superstring and Other Superstring Vacuum Configurations with 16 Supercharges [PDF]

, 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, Alessandrini, Alvarez-Gaumé, Angelantoni, Angelantonj, Antoniadis, Antoniadis, Belavin, Bianchi, Bianchi, Bianchi, Bianchi, Bianchi, Bianchi, Bianchi, Bianchi, Cai, Cardy, Dabholkar, Dixon, Dixon, Dixon, Dixon, Dixon, Duff, Ferrara, Fioravanti, Friedan, Gepner, Green, Green, Green, Gross, Hořova, Hořova, Hull, Hull, Hull, Kawai, Lerche, Marcus, Massimo Bianchi, Narain, Narain, Narain, Polchinski, Pradisi, Pradisi, Pradisi, Pradisi, Sagnotti, Salam, Seiberg, Seiberg, Sieberg, Sieberg, Tseytlin, Tseytlin, Vafa, Verlinde, Witten   +60 more
core   +2 more sources

String Phenomenology: Past, Present and Future Perspectives [PDF]

, 2014
The observation of a scalar resonance at the LHC, compatible with perturbative electroweak symmetry breaking, reinforces the Standard Model parameterisation of all subatomic data.
Faraggi, Alon E.
core   +3 more sources