Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 5: Theory I
HK 5.3: Vortrag
Montag, 8. März 2004, 16:30–16:45, D
Glueball mixing in an effective field theoretical approach — •Francesco Giacosa, Thomas Gutsche, Valery Lyubovitskij, and Amand Faessler — Institut fuer Theoretische Physik, Auf der Morgenstelle 14, Geb. D, 72076 Tuebingen
The search and the identification of the glueball is an open problem both from experimental and theoretical point of view. It is believed that the pure glueball mixes with its ”neigbouhrs”, scalar quark-antiquark states, giving rise to three resonances: f0(1310), f0(1500) and f0(1710); each of them is formed by gluon-gluon and quark-antiquark. The system is analyzed within an effective field theoretical approach in order to find the relation between the masses ”before” the mixing and those ”after” the mixing (which are the masses of the physicl states); also the composition of the resonances in terms of their gluon-gluon and quark-antiquark admixtures is evaluated. The goal is the calculation of the strong and the radiative deays of the physical resonances.