Modification by pion exchange of near threshold resonance line shape in open heavy flavor channel

Abstract

The effect of the pion exchange on the line shape of near threshold bottomoniumlike resonances decaying into an $S$ wave pair of $B^{(\ast )}$ mesons is considered. It is pointed out that this effect, parametrically enhanced by the heavy meson mass, can be of a practical significance in determining the parameters of the bottomoniumlike resonances such as the known $Z_b(10610)$ and $Z_b(10650)$ states.

8 pages, 1 figure

References in corpus (6)

• The Heavy Quark Spin Symmetry Partners of the X(3872)
• A practical parametrization for line shapes of near-threshold states
• Hidden-Beauty Charged Tetraquarks and Heavy Quark Spin Conservation
• Enhanced mixing of partial waves near threshold for heavy meson pairs and properties of $Z_b(10610)$ and $Z_b(10650)$ resonances
• Study of Three-Body Y(10860) Decays
• Isospin breaking in the yield of heavy meson pairs in e+e- annihilation near threshold

Cited by in corpus (3)

• New Exotic Meson and Baryon Resonances from Doubly-Heavy Hadronic Molecules
• Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrisation for line shapes
• The line shapes of the $Z_b(10610)$ and $Z_b(10650)$ in the elastic and inelastic channels revisited