Confirming the molecular nature of the $Z_b(10610)$ and the $Z_b(10650)$

Abstract

The decays of the $Z_b(10610)$ and the $Z_b(10650)$ to ${\rm Y}(nS)\pi$, $h_b(mP)\pi$ and ${\chi }_{bJ}(mP)\gamma$ ($n=1,2,3$, $m=1,2$ and $J=0,1,2$) are investigated within a nonrelativistic effective field theory. It is argued that, while the decays to ${\rm Y}(nS)\pi$ suffer from potentially large higher order corrections, the $P$-wave transitions of the $Z_b$ states offer the best possibility to confirm the nature of the $Z_b$ states as molecular states and to further study their properties. We give nontrivial and parameter-free predictions for the ratios of various partial widths for final states with $h_b(mP)\pi$ and ${\chi }_{bJ}(mP)\gamma$. In addition, the branching fractions for the neutral $Z_b$-states to ${\chi }_{bJ}\gamma$ are predicted to be of order $10^{-4}$--$10^{-3}$. This provides a fine test of the molecular nature in future high-luminosity experiments.

18 pages, 2 figures

References in corpus (13)

• Pion Interactions in the X(3872)
• Effect of charmed meson loops on charmonium transitions
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• Two-photon decays of hadronic molecules
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• Is $Z_b(10610)$ a Molecular State?
• Enhanced mixing of partial waves near threshold for heavy meson pairs and properties of $Z_b(10610)$ and $Z_b(10650)$ resonances
• Open charm effects in $e^{+}{e}^{-}\to J/\psi \eta$, $J/\psi {\pi }^0$ and $\varphi {\eta }_c$
• Light quark mass dependence in heavy quarkonium physics
• Study of Three-Body Y(10860) Decays
• Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0
• The possible candidates of tetraquark : $Z_b(10610)$ and $Z_b(10650)$

Cited by in corpus (27)

• Multiquark Resonances
• Exotics: Heavy Pentaquarks and Tetraquarks
• Four-Quark Hadrons: an Updated Review
• Study of $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ interactions in $I=1$ and relationship to the $Z_b(10610)$, $Z_b(10650)$ states
• More hidden heavy quarkonium molecules and their discovery decay modes
• Probing the nature of Z_c states via the eta_c rho decay
• Effects of $Z_b$ states and bottom meson loops on ${\rm Y}(4S)\to {\rm Y}(1S,2S){\pi }^{+}{\pi }^{-}$ transitions
• Enhanced breaking of heavy quark spin symmetry
• $Z_b(10610)$ and $Z_b^{\prime }(10650)$ decays in a covariant quark model
• Tetraquark systems $\bar{b}b\bar{d}u$ in the static limit and lattice QCD
• Magnetic dipole moment of $Z_b(10610)$ in light-cone QCD
• Hunting for the $X_b$ via hidden bottomonium decays
• Spectroscopic parameters and decays of the resonance $Z_b(10610)$
• Weak Decays of Triply Heavy Tetraquarks $b\bar{c}b\bar{q}$
• Exploring the ${\rm Y}(4S,5S,6S)\to h_b(1P)\eta$ hidden-bottom hadronic transitions
• The $Z_b$ structures in a constituent quark model coupled-channels calculation
• Hadronic states with both open charm and bottom in effective field theory
• Search for $J^{PC}=1^{-+}$ exotic state in $e^{+}{e}^{-}$ annihilation
• Investigations on the light hadron decays of $Z_b(10610)$ and $Z_b(10650)$
• Production of $X_b$ via ${\rm Y}(5S,6S)$ radiative decays
• Study on the radiative decays of $h_c$ via intermediate meson loops model
• $D$ wave bottomonia production from $Z_b^{(\prime )}$ decay
• Spin Partners of the $B^{(\ast )}{\bar{B}}^{(\ast )}$ resonances with a different approach than the Breit-Wigner parameterization
• Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$
• Evasion of HSR in the charmless decays of excited $P$-wave charmonia
• Model-independent mass determination of near-threshold states from short-range production
• An analysis on doubly bottom molecular tetraquarks composed of $H_{(s)}$ and $T_{(s)}$ doublets