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Elusive Worldsheet Instantons in Heterotic String Compactifications

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Date
2012-01-01
Authors
Aspinwall, Paul S
Plesser, M Ronen
Editors
Block, J
Distler, J
Donagi, R
Sharpe, E
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Abstract
We compute the spectrum of massless gauge singlets in some heterotic string compactifications using Landau-Ginzburg, orbifold and non-linear sigma-model methods. This probes the worldsheet instanton corrections to the quadratic terms in the spacetime superpotential. Previous results predict that some of these states remain massless when instanton effects are included. We find vanishing masses in many cases not covered by these predictions. However, we discover that in the case of the Z-manifold the corrections do not vanish. Despite this, in all the examples studied, we find that the massless spectrum in the orbifold limit agrees with the nonlinear sigma-model computation.
Type
Journal article
Subject
Science & Technology
Physical Sciences
Mathematics
Physics, Mathematical
Physics
LOCAL COHOMOLOGY
TORIC VARIETIES
MODULI
SPACE
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https://hdl.handle.net/10161/19594
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Scholars@Duke

Plesser

M. Ronen Plesser

Professor of Physics
My research is in String Theory, the most ambitious attempt yet at a comprehensive theory of the fundamental structure of the universe. In some (rather imprecise) sense, string theory replaces the particles that form the fundamental building blocks for conventional theories (the fields, or wave phenomena, we observe are obtained starting from particles when we apply the principles of quantum mechanics) with objects that are not point-like but extended in one dimension – strings. At present, th
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