1. Excited flux tube from q¯g hybrid mesons
- Author
-
Fabien Buisseret, Vincent Mathieu, Claude Semay, and B. Silvestre-Brac
- Subjects
Physics ,Quark ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Flux tube ,010308 nuclear & particles physics ,Bar (music) ,High Energy Physics::Lattice ,Nuclear Theory ,High Energy Physics::Phenomenology ,Degrees of freedom (physics and chemistry) ,01 natural sciences ,Gluon ,Excited state ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Wave function - Abstract
In the framework of quark models, hybrid mesons are either seen as two-body $q\bar q$ systems with an excited flux tube connecting the quark to the antiquark or as three-body $q\bar q g$ systems including a constituent gluon. In this work we show that, starting from the three-body wave function of the $q\bar q g$ hybrid meson in which the gluonic degrees of freedom are averaged, the excited flux tube picture emerges as an equivalent $q\bar q$ potential. This equivalence between the excited flux tube and the constituent gluon approach is confirmed for heavy hybrid mesons but, for the first time, it is shown to hold in the light sector too, provided the contribution of the quark dynamics is correctly taken into account.
- Published
- 2007
- Full Text
- View/download PDF