Abstract :
[en] The relativistic flux tube model is an effective description of confined quarks and gluons in which the confining interaction is carried by the flux tube, a Nambu-Goto string. We first show that the relativistic flux tube model can be applied to glueballs seen as bound states of transverse constituent gluons. After a comparison of that approach with usual spinless Salpeter Hamiltonians, we compute glueball masses and decay widths. Comments about the eta-eta'-pseudosclar glueball problem, the glueball-Pomeron conjecture, and finite-temperature effects are finally given. We also point out the existence of a duality between open and closed flux tube models of glueballs.
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