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HK: Physik der Hadronen und Kerne

HK 4: Elektromagnetische und hadronische Proben II

HK 4.4: Vortrag

Montag, 19. März 2001, 17:45–18:00, C

Dalitz Analysis of D_S → K_S⁰ K_S⁰ π^{± *} — •Helmut Schmücker — Institut für Experimentalphysik I, Ruhr-Universität Bochum, Universitätstr. 150, D - 44780 Bochum

The BaBar detector is located at the asymmetric B factory PEP-II, an e⁻e⁺-collider operating at a center of mass energy of 10.58 GeV. The high luminosity of PEPII in combination with BaBar’s vertexing possibilities offer unique opportunities for studies on light meson spectroscopy. The basic interest in this domain is the search for exotic states: mesons composed only of gluons (glueballs) orstates with an additional constituent gluon (hybrids). Results of a partial wave analysis of the decay D_S → K_S⁰ K_S⁰ π will be presented. This decay is of interest to the discussion of the existence and the spin of isoscalar resonances above 1.5 GeV/c². This is the mass region, where the glueball ground state is conjectured to lie, mixing with other isoscalar 0⁺⁺-states. D_S → K_S⁰ K_S⁰ π^± events are selected with high efficiency and low backgrounds fromfragmentation events. The data is based on an integrated luminosity of 25 fb⁻¹, which corresponds to a number of more than 1800 reconstructed D_S → K_S⁰ K_S⁰ π^± decays.

^* gefördert durch das bmb+f