منابع مشابه
Asymmetric Orbifolds and Wilson Lines
We generalize the rules for the free fermionic string construction to include other asymmetric orbifolds. Examples are given to illustrate the use of these rules. Typeset using REVTEX
متن کاملWilson Lines and Symmetry Breaking on Orbifolds
A five-dimensional SU(5) grand unified theory is constructed on the orbifold S/Z2, with gauge symmetry breaking accomplished by a background gauge field. The theory is shown to be equivalent to one with gauge symmetry breaking by orbifold boundary conditions — the two pictures are related by a non-periodic gauge transformation. This effective field theory possesses localized explicit breaking o...
متن کاملSupersymmetry breaking on orbifolds from Wilson lines ∗
We consider five dimensional theories compactified on the orbifold S 1 /Z 2 and prove that spontaneous local supersymmetry breaking by Wilson lines and by the Scherk-Schwarz mechanism are equivalent. Wilson breaking is triggered by the SU (2) R symmetry which is gauged in off-shell N = 2 supergravity by auxiliary fields. The super-Higgs mechanism disposes of the would-be Goldstinos which are ab...
متن کاملBackground Symmetries in Orbifolds with Discrete Wilson Lines
Target space symmetries are studied for orbifold compactified string theories containing Wilson line background fields. The symmetries determined are for those moduli which contribute to the string loop threshold corrections of the gauge coupling constants. The groups found are subgroups of the modular group P SL(2, Z) and depend on the choice of discrete Wilson lines and the shape of the under...
متن کاملTarget Space Duality in Orbifolds with Continuous and Discrete Wilson Lines
Duality symmetry is studied for heterotic string orbifold compactifications in the presence of a general background which in addition to the metric and antisym-metric tensor fields contains both discrete and continuous Wilson lines.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1987
ISSN: 0370-2693
DOI: 10.1016/0370-2693(87)90066-9