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Strings on pp-waves and Hadrons in (softly broken) N=1 gauge theories

R. Apreda·F. Bigazzi·A. L. Cotrone
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Abstract

We study the Penrose limit of Type IIB duals of softly broken N=1 SU(N) gauge theories in four dimensions, obtained as deformations of the Maldacena-Nunez and Klebanov-Strassler backgrounds. We extract the string spectrum on the resulting pp-wave backgrounds and discuss some properties of the conjectured dual gauge theory hadrons, the so called "Annulons". The string zero-point energy on the light-cone is nontrivial, due to the loss of linearly realized worldsheet supersymmetry, and negative, even in the unbroken supersymmetric case. This causes the appearance of non-perturbative corrections to the hadronic mass spectrum. We briefly discuss the thermodynamic behavior of these string models, calculating the corresponding Hagedorn temperatures.

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R. Apreda, F. Bigazzi, A. L. Cotrone. 2003-07-04. Strings on pp-waves and Hadrons in (softly broken) N=1 gauge theories. https://doi.org/10.1088/1126-6708%2F2003%2F12%2F042

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