Evidence for Negative Stiffness of QCD Strings

Details Evidence for Negative Stiffness of QCD Strings Evidence for Negative Stiffness of QCD Strings

1996-01-09

arxiv.org/abs/hep-th/9601030v3

Physics

High Energy Physics

High Energy Physics - Theory

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Scientific paper

QCD strings are color-electric flux tubes between quarks with a finite thickness and thus a finite curvature stiffness. Contrary to an earlier rigid-string by Polyakov and Kleinert, and motivated by the properties of a magnetic flux tubes in type-II superconductors we put forward the hypothesis that QCD strings have a {\em negative\/ stiffness. We set up a new string model with this property and show that it is free of the three principal problems of rigid-strings --- particle states with negative norm, nonexistence of a lowest-energy state, and wrong high-temperature behavior of string tension --- thus making it a better candidate for a string description of quark forces than previous models.

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