Bochum 1998 – wissenschaftliches Programm
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HK: Hadronen und Kerne
HK 10: Structure of Baryons, Mesons I, Crystal Barrel Results
HK 10.9: Vortrag
Montag, 16. März 1998, 16:00–16:15, H
4π Decay Modes of the f0(1500) Resonance — •M. Strohmeier-Prešiček, T. Gutsche, and A. Faessler — Institut f"ur Theoretische Physik, Universit"at T"ubingen, Auf der Morgenstelle 14, D-72076 T"ubingen
We investigate the two-body decay modes ρρ , ππ∗(1300) and σ σ of the f0(1500) resonance, all leading to the 4π decay channel, in a three-state mixing scheme, where the f0(1500) is a mixture of the lowest-lying scalar glueball with the nearby isoscalar states of the 0++ QQ nonet. In the leading order of this scheme, the decay mechanism of the f0(1500) proceeds dominantly via its quarkonia components, which can be described in the framework of the 3P0 QQ pair creation model. We show that this leading order approach is insufficient for describing the experimental results for the 4π decay resulting from the two body modes ρρ,σσ,π∗π.