Heidelberg 2015 – wissenschaftliches Programm
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SYEP: Symposium Efimov Physics
SYEP 2: Symposium Efimov Physics II
SYEP 2.6: Vortrag
Montag, 23. März 2015, 16:15–16:30, C/gHS
Zb-B scattering in pionless effective field theory — •Erik Wilbring1, Hans-Werner Hammer2, and Ulf-G. Meißner1,3 — 1Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany — 2Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany — 3Institut für Kernphysik (IKP-3), Institute for Advanced Simulation (IAS-4) and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany
The two charged exotic mesons Zb(10610) and Z′b(10650) found by the Belle collaboration are interpreted as hadronic molecules made of two loosely-bound B-mesons. Motivated by their relatively small binding energies, we analyze their scattering off a third B-meson using a non-relativistic effective field theory without pions. In analogy to the deuteron considered as a NN bound state and the triton as the first Efimov trimer in the NNN system, we search for possible bound states of three B-mesons which originate from the Efimov effect. In addition we determine the scattering length and phase shift of different elastic Zb–B-meson scattering processes by numerically solving the corresponding (coupled) integral equations.