We discuss non-geometric supersymmetric heterotic string models in D=4, in the framework of the free fermionic construction. We perform a systematic scan of models with four a priori left-right asymmetric Z2 projections and shifts. We analyze some 220 models, identifying 18 inequivalent classes and addressing variants generated by discrete torsions. They do not contain geometrical or trivial neutral moduli, apart from the dilaton. However, we show the existence of flat directions in the form of exactly marginal deformations and identify patterns of symmetry breaking where product gauge groups, realized at level one, are broken to their diagonal at higher level. We also describe an “inverse Gepner map” from Heterotic to Type II models that could be used, in certain non geometric settings, to define “effective” topological invariants.

Bianchi, M., Pradisi, G., Timirgaziu, C., Tripodi, L. (2012). Heterotic T-folds with a small number of neutral moduli. JOURNAL OF HIGH ENERGY PHYSICS, 2012 [10.1007/JHEP10(2012)089].

Heterotic T-folds with a small number of neutral moduli

BIANCHI, MASSIMO;PRADISI, GIANFRANCO;
2012

Abstract

We discuss non-geometric supersymmetric heterotic string models in D=4, in the framework of the free fermionic construction. We perform a systematic scan of models with four a priori left-right asymmetric Z2 projections and shifts. We analyze some 220 models, identifying 18 inequivalent classes and addressing variants generated by discrete torsions. They do not contain geometrical or trivial neutral moduli, apart from the dilaton. However, we show the existence of flat directions in the form of exactly marginal deformations and identify patterns of symmetry breaking where product gauge groups, realized at level one, are broken to their diagonal at higher level. We also describe an “inverse Gepner map” from Heterotic to Type II models that could be used, in certain non geometric settings, to define “effective” topological invariants.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
English
ArXiv ePrint: 1207.2665
Bianchi, M., Pradisi, G., Timirgaziu, C., Tripodi, L. (2012). Heterotic T-folds with a small number of neutral moduli. JOURNAL OF HIGH ENERGY PHYSICS, 2012 [10.1007/JHEP10(2012)089].
Bianchi, M; Pradisi, G; Timirgaziu, C; Tripodi, L
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/77841
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