Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 30: Hadronenstruktur und -spektroskopie

HK 30.6: Talk

Wednesday, March 21, 2012, 18:00–18:15, RW 1

Scalar tetraquark boundstates in a covariant DSE-BSE approach — •Walter Heupel, Christian Fischer, and Gernot Eichmann — Institut fuer Theoretische Physik I, Justus-Liebig Universitaet Giessen, Deutschland

The bound state of the scalar tetraquark with quantum numbers 0⁺ is solved via a Fadeev-like equation. The genuine four-body equation is reduced to an effective two-body problem using a meson-meson/antidiquark-diquark picture. All ingredients of the boundstate equation are calculated in a covariant Dyson-Schwinger/Bethe-Salpeter approach employing a rainbow-ladder truncation together with the Maris-Tandy effective interaction. First results hinting at a bound mass in the 450 MeV region are presented.