String Theory and the Size of Hadrons

Details String Theory and the Size of Hadrons String Theory and the Size of Hadrons

2001-12-20

arxiv.org/abs/hep-th/0112204v2

Physics

High Energy Physics

High Energy Physics - Theory

15 pages

Scientific paper

We begin by outlining the ancient puzzle of off shell currents and infinite size particles in a string theory of hadrons. We then consider the problem from the modern AdS/CFT perspective. We argue that although hadrons should be thought of as ideal thin strings from the 5-dimensional bulk point of view, the 4-dimensional strings are a superposition of "fat" strings of different thickness. We also find that the warped nature of the target geometry provides a mechanism for taming the infinite zero point fluctuations which apparently produce a divergent result for hadronic radii. Finally a calculation of the large momentum behavior of the form factor is given in the limit of strong 't Hooft parameter where the classical gravity limit is appropriate. We find agreement with parton model expectations.

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