Münster 2002 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 19: Electromagnetic and Hadronic Probes II
HK 19.1: Gruppenbericht
Dienstag, 12. März 2002, 16:45–17:15, D
Meson Spectroscopy with BABAR∗ — •Klaus Götzen — Institut für Experimentalphysik I, Ruhr-Universität Bochum
The high luminosity of PEP-II in combination with the vertexing possibilities of the BABAR-Detector offers unique opportunities on light meson spectroscopy. The basic interest in this domain is the search for exotic states. In order to find those, the spectrum of conventional mesons must be precisely known. Earlier analyses were not able to resolve all ambiguities arising because of overlapping states. Some ambiguities can be resolved using a clean initial state which restricts the final state to specific quantum numbers, such as the weak decays of Ds±-mesons into three pseudoscalars, allowing only a few resonances to occur.
Discussed in particular are the decays Ds±→ KS0 KS0 π± and Ds±→ π+ π− π±, and the data selection and Dalitz plot analyses are presented. These decays are of particular interest for the discussion of the existence and the spin of isoscalar resonances above 1.5 GeV/c2. In this mass region the glueball ground state is conjectured to lie and might mix strongly with other isoscalar JPC = 0++-states.
∗ supported by the BMB+F