Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 5: Theory I

HK 5.2: Vortrag

Montag, 8. März 2004, 16:15–16:30, D

Can the D_sJ^∗(2317) be explained as a DK molecule? — •Felix Sassen — IKP Theorie Forschungzentrum-Jülich, 52425 Jülich

Applying the Blankenbecler Sugar scattering equation in the case of coupled DK- and D_s⁺π-channels we find that a dynamically generated pole arises close to 2317 MeV, when we assume SU(4)-symmetry to relate the coupling parameters to the well known coupling parameters in the case of ππ-KK scattering. Our model relates in a natural way the contributions of D_s⁺π scattering originating from this pole to the contributions from the opening iso vector DK-channel, if we assume that isospin breaking only happens via the mass differences and ρω- as well as πη-mixing. We use the constrains coming from the BaBar, Cleo and Belle observations of the D_sJ^∗(2317) to give an estimate for the non molecular iso scalar contribution to the observed state.