2017/07/03 by M. B. Voloshin
Physics and Astronomy · #B meson #Bar (unit) #Isovector #Meson #Mixing (physics) #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics of Superconductivity and Magnetism #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Resonance (particle physics) #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.96.094024
published as Phys. Rev. D 96, 094024 (2017) · 8 pages, 2 figures
arxiv created 2017/07/03 · openalex publication_date 2017/11/27 · arxiv updated 2017/12/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The isovector bottomoniumlike exotic resonances Zb(10610) and Zb(10650) are very close to the thresholds of heavy meson pairs BB*(BB*) and B*B*, and are naturally understood as ``molecular'' states made of the corresponding meson-antimeson pairs. The picture with a full separation of the two channels cannot be exact and a cross-feed between the states necessarily takes place. A simple model is considered here describing the mixing between the channels in terms of one parameter. The model reasonably describes the current data on the decays of the Zb resonances to bottomonium plus a pion and predicts the rate and a distinctive interference pattern for the decay Zb(10650)\ensuremath→BB*(BB*) as well as excess of the mass splitting between the resonances over the mass difference between B* and B mesons.