Investigating different structures of the Z_{b}(10610) and Z_{b}(10650)

Abstract

The recently observed narrow resonance $Z_b(10610)$ is examined with the assumptions both as a $B^{\ast }\bar{B}$ molecular state and a $[bd][\bar{b}\bar{u}]$ tetraquark state with quantum numbers $I^G{J}^P=1^{+}{1}^{+}$. Possible interpolating currents are constructed to describe the $Z_b(10650)$ as an axial-vector $B^{\ast }{\bar{B}}^{\ast }$ molecular state or a $[bd][\bar{b}\bar{u}]$ tetraquark state. Using QCD sum rules (QCDSR), we consider contributions up to dimension six in the operator product expansion (OPE) at the leading order in ${\alpha }_s$. The mass is obtained as $(10.44\pm 0.23)GeV$ for molecular state and $(10.50\pm 0.19)GeV$ for tetraquark state, both of which coincide with the $Z_b(10610)$. The results $m_{B^{\ast }{\bar{B}}^{\ast }}=(10.45\pm 0.31)GeV$ and $m_{[bd][\bar{b}\bar{u}]}=(10.48\pm 0.33)GeV$ are consistent with the $Z_b(10650)$.

17 pages, 9 figures

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Cited by in corpus (38)

• The hidden-charm pentaquark and tetraquark states
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Possible assignments of the $X(3872)$, $Z_c(3900)$ and $Z_b(10610)$ as axial-vector molecular states
• Bottomonium spectrum revisited
• Reanalysis of the $Y(3940)$, $Y(4140)$, $Z_c(4020)$, $Z_c(4025)$ and $Z_b(10650)$ as molecular states with QCD sum rules
• The $Z_b(10610)$ and $Z_b(10650)$ as axial-vector tetraquark states in the QCD sum rules
• Exotic mesons with hidden bottom near thresholds
• Decays of Zb(+) and Zb'(+) as hadronic molecules
• 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
• Possible interpretation of the $Z_b$(10610) and $Z_b$(10650) in a chiral quark model
• General considerations on the nature of $Z_b(10610)$ and $Z_b(10650)$ from their pole positions
• Interpretation of $Z_c(4025)$ as the Hidden Charm Tetraquark States via QCD Sum Rules
• $Z_b/Z_b^{\prime }\to {\rm Y}\pi$ and $h_b\pi$ decays in intermediate meson loops model
• XYZ-like Spectra from Laplace Sum Rule at N2LO in the Chiral Limit
• Estimating the mass of the hidden charm $1^{+}(1^{+})$ tetraquark state via QCD sum rules
• Could $Z_c(3900)$ be a $I^G{J}^P=1^{+}{1}^{+}$ $D^{\ast }\bar{D}$ molecular state?
• Possible structure of the newly found exotic state ${\eta }_1(1855)$
• Line shapes in Υ(5S) \to B^{(*)} \bar{B}^{(*)}πwith Z(10610) and Z(10650) using effective field theory
• Hidden-bottom and -charm hexaquark states in QCD sum rules
• Analysis of the hidden-bottom tetraquark mass spectrum with the QCD sum rules
• Light baryonium spectrum
• $Z_b(10610)$ and $Z_b^{\prime }(10650)$ decays in a covariant quark model
• Could $Z_c(4025)$ be a $J^P=1^{+}$ $D^{\ast }\overline{D^{\ast }}$ molecular state?
• Interpretation of $Z_b(10610)$ and $Z_b(10650)$ in the ISPE mechanism and the Charmonium Counterpart
• Magnetic dipole moment of $Z_b(10610)$ in light-cone QCD
• Decays of Zb -> Upsilon + pi via triangle diagrams in heavy meson molecules
• Spectroscopic parameters and decays of the resonance $Z_b(10610)$
• Production of the $Z_b^{(\prime )}$ states from the ${\rm Y}(5S,6S)$ decays
• Analysis of the axialvector $B_c$-like tetraquark states with the QCD sum rules
• Investigations on the light hadron decays of $Z_b(10610)$ and $Z_b(10650)$
• Radially excited axial mesons and the enigmatic $Z_c$ and $Z_b$ in a coupled-channel model
• Is $J^{PC}=3^{-+}$ molecule possible?
• Composite nature of $Z_b$ states from data analysis
• QCD sum rules study of X(4350)
• $D$ wave bottomonia production from $Z_b^{(\prime )}$ decay
• Charged bottomonium-like structures $Z_b(10610)$ and $Z_b(10650)$
• Spin Partners of the $B^{(\ast )}{\bar{B}}^{(\ast )}$ resonances with a different approach than the Breit-Wigner parameterization
• Fully strange tetraquark states via QCD sum rules