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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 13: Poster Session: Theory

HK 13.12: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Stability of qq strings in the Chromodielectric Model — •Gunnar Martens, Carsten Greiner*, Stefan Leupold, and Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen, 35392 Giessen, Germany (* present address: Institut für Theoretische Physik, Universität Frankfurt, 60054 Frankfurt am Main, Germany)

We describe color interactions in the Chromodielectric Model where the color electric flux is confined through the interaction with a dielectric medium [1]. The model parameters are fixed to reproduce lattice calculations for both the potential and the geometric shape of qq flux tubes. We investigate the stability of these qq strings i) in the presence of an external color electric field and ii) with respect to q/q production in the field of the string. In the former case we find that strings will dissolve for background fields corresponding to an energy density of 200 MeV/fm3. In the latter case we present a tunnel potential for pair creation.

[1] R. Friedberg, T.D. Lee, Phys. Rev. D 15 (1977) 1694.

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