Glueball and hybrid mass and decay with string tension below Casimir scaling

Details Glueball and hybrid mass and decay with string tension below Casimir scaling Glueball and hybrid mass and decay with string tension below Casimir scaling

2005-08-28

arxiv.org/abs/hep-ph/0508281v2

J.Phys. G34 (2007) 195207

Physics

High Energy Physics

High Energy Physics - Phenomenology

9pages RevTex, 5 figures, 4 tables, version with updated relativistic kinetics

Scientific paper

Lattice computations with excited SU(3) representations suggest that the confining gluon-gluon interaction complies with the Casimir scaling. The constituent gluon models have also been assuming the Casimir scaling. Inspired in type-II superconductors, we explore a new scenario for the gluon-gluon interaction where the adjoint string is replaced by a pair of fundamental strings, resulting in a factor of 2, smaller than 9/4. To test our proposal we construct a simple constituent gluon model, extrapolated from the funnel potential for quarkonium, and apply it to compute the wave-function of glueballs and of hybrid gluelumps. From the decay widths of quarkonium, we also extrapolate the decay widths of the glueballs and hybrid gluelumps. Our predictions apply to charmonia, lightonia, glueballs and hybrid gluelumps with large angular momentum.

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