Regge-like quark-antiquark excitations in the effective-action formalism

Details Regge-like quark-antiquark excitations in the effective-action formalism Regge-like quark-antiquark excitations in the effective-action formalism

2011-03-30

arxiv.org/abs/1103.5984v2

PoS QCD-TNT-II:004,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 figures, talk given at the International Workshop on QCD Green's Functions, Confinement and Phenomenology, 5-9 Sep

Scientific paper

Radial excitations of the quark-antiquark string sweeping the Wilson-loop area are considered in the framework of the effective-action formalism. Identifying these excitations with the daughter Regge trajectories, we find corrections which they produce to the constituent quark mass. The energy of the quark-antiquark pair turns out to be mostly saturated by the constituent quark masses, rather than by the elongation of the quark-antiquark string. Specifically, while the constituent quark mass turns out to increase as the square root of the radial-excitation quantum number, the energy of the string increases only as the fourth root of that number.

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