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Heavy-quark potential with dynamical flavors: A first-order transition

par Bigazzi, Francesco ;Cotrone, Aldo A.L.;Núñez, Carlos;Paredes, Angel
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 78, 11, 114012
Publication Publié, 2008-12

Article révisé par les pairs

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Résumé :

We study the static potential between external quark-antiquark pairs in a strongly coupled gauge theory with a large number of colors and massive dynamical flavors, using a dual string description. When the constituent mass of the dynamical quarks is set below a certain critical value, we find a first-order phase transition between a linear and a Coulomb-like regime. Above the critical mass the two phases are smoothly connected. We also study the dependence on the theory parameters of the quark-antiquark separation at which the static configuration decays into specific static-dynamical mesons. © 2008 The American Physical Society.