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Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 30: Hadronenstruktur und -spektroskopie

HK 30.1: Group Report

Wednesday, March 21, 2012, 16:30–17:00, RW 1

Hadronic Molecules with Open or Hidden Heavy Flavor — •Martin Cleven1, Feng-Kun Guo2, Christoph Hanhart1, and Ulf-G. Meißner1,21Institute for Advanced Simulation and Jülich Center for Hadron Physics, Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany — 2Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany

We present techniques to identify molecular states in the spectrum of hadrons. As an example we study the bottomonia states Zb(10610) and Zb(10650) which have recently been discovered in the Υ(5S)→π+πhb and Υ(5S)→π+πΥ(nS) decays. Their masses are located very close to the BB and B*B* thresholds. It will be shown that the assumption that the Zb(10610) and Zb(10650) are BB*+c.c. and B*B* bound states, respectively, with very small binding energies is consistent with the data.

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