Journal
NUCLEAR PHYSICS B
Volume 636, Issue 1-2, Pages 99-114Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0550-3213(02)00373-5
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A world-sheet sigma model approach is applied to string theories dual to four-dimensional gauge theories, and semi-classical soliton solutions representing highly excited string states are identified which correspond to gauge theory operators with relatively small anomalous dimensions. The simplest class of such states are strings on the leading Regge trajectory, with large spin in AdS(5). These correspond to operators with many covariant derivatives, whose anomalous dimension grows logarithmically with the space-time spin. In the gauge theory, the logarithmic scaling violations are similar to those found in perturbation theory. Other examples of highly excited string states are also considered. (C) 2002 Elsevier Science B.V. All rights reserved.
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