Dalitz Analyses of Ds± → Ks0Ks0π± and Ds± → π+π−π±

The high luminosity of PEP‐II in combination with the vertexing possibilities of the BABAR‐detector [1] offer unique opportunities on light meson spectroscopy. The basic interest in this domain is the search for exotic states. Many of the candidates for conventional mesons are under heavy discussion because of analysis ambiguities, mixing with conventional mesons and some are only seen in selected reactions. Many ambiguities can be resolved using a clean initial state which restricts the final state to specific quantum numbers, such as weak decays of Ds±‐mesons into three pseudoscalars, allowing only a few resonances to occur. The selections and the results of the Dalitz plot analyses of the decays Ds± → Ks0Ks0π± and Ds± → π+π−π± 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.