Abstract
A few of the newly discovered XYZ states might be bound states of a heavy meson and antimeson. These molecular states, as they are also known, respect heavy quark symmetries at the potential level and as a consequence they might appear in multiplets. Here we exploit their symmetry to predict new states from already known ones. For instance, we expect the existence of a bottom counterpart of the X(3872) at 10580 MeV. Conversely, the assumption that the Zb(10610) and [Formula: see text] are molecular implies a pair of analogous resonances with hidden charm located at 3870 and 4010 MeV. They might be identified with the Zc(3900) and Zc(4025), supporting the idea that they are [Formula: see text] and [Formula: see text] bound states.
Highlights
FENG-KUN GUO Helmholtz-Institut fur Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universitat Bonn, D-53115 Bonn, Germany
A few of the newly discovered XYZ states might be bound states of a heavy meson and antimeson. These molecular states, as they are known, respect heavy quark symmetries at the potential level and as a consequence they might appear in multiplets
The molecular hypothesis is enticing for XYZ states that are located in the vicinity of an open heavy flavor threshold
Summary
FENG-KUN GUO Helmholtz-Institut fur Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universitat Bonn, D-53115 Bonn, Germany. A few of the newly discovered XYZ states might be bound states of a heavy meson and antimeson. These molecular states, as they are known, respect heavy quark symmetries at the potential level and as a consequence they might appear in multiplets.
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