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arXiv · hep-th/0306139

Stringing Spins and Spinning Strings

N. Beisert·J. A. Minahan·M. Staudacher·K. Zarembo
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Abstract

We apply recently developed integrable spin chain and dilatation operator techniques in order to compute the planar one-loop anomalous dimensions for certain operators containing a large number of scalar fields in N =4 Super Yang-Mills. The first set of operators, belonging to the SO(6) representations [J,L-2J,J], interpolate smoothly between the BMN case of two impurities (J=2) and the extreme case where the number of impurities equals half the total number of fields (J=L/2). The result for this particular [J,0,J] operator is smaller than the anomalous dimension derived by Frolov and Tseytlin [hep-th/0304255] for a semiclassical string configuration which is the dual of a gauge invariant operator in the same representation. We then identify a second set of operators which also belong to [J,L-2J,J] representations, but which do not have a BMN limit. In this case the anomalous dimension of the [J,0,J] operator does match the Frolov-Tseytlin prediction. We also show that the fluctuation spectra for this [J,0,J] operator is consistent with the string prediction.

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N. Beisert, J. A. Minahan, M. Staudacher, K. Zarembo. 2003-06-30. Stringing Spins and Spinning Strings. https://doi.org/10.1088/1126-6708%2F2003%2F09%2F010

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