Exotic mesons, locking states and their role in the formation of the confinement barrier

Details Exotic mesons, locking states and their role in the formation of the confinement barrier Exotic mesons, locking states and their role in the formation of the confinement barrier

1998-02-26

arxiv.org/abs/hep-ph/9802426v1

Phys.Rev. D58 (1998) 111503

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, RevTeX, 5 EPS figures, epsfig.sty

Scientific paper

10.1103/PhysRevD.58.111503

We discuss a mechanism by which a set of $q\bar q$-states mixes with an exotic one, so that the exotic state accumulates the widths of the overlapping $\bar qq$ resonances. The broad state created this way acts as a 'locking' state for the others. Using results of a previous analysis of the $(IJ^{PC}=00^{++})$-wave, we estimate the mean radius squared of the broad state $f_0 (1530^{+90}_{-250})$; it appears to be distinctly larger than the mean squared radii of the locked narrow states. This supports an idea about the constructive role of broad states in forming the confinement barrier.

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