Spectroscopic parameters and decays of the resonance $Z_b(10610)$

Abstract

The resonance $Z_b(10610)$ is investigated as the diquark-antidiquark $Z_b=[bu][\overline{b}\overline{d}]$ state with spin-parities $J^{PC}=1^{+-}$. The mass and current coupling of the resonance $Z_b(10610)$ are evaluated using QCD two-point sum rule and taking into account the vacuum condensates up to ten dimensions. We study the vertices $Z_b{\rm Y}(nS)\pi (n=1,2,3)$ by applying the QCD light-cone sum rule to compute the corresponding strong couplings $g_{Z_b{\rm Y}(nS)\pi }$ and widths of the decays $Z_b\to {\rm Y}(nS)\pi$. We explore also the vertices $Z_b{h}_b(mP)\pi (m=1,2)$ and calculate the couplings $g_{Z_b{h}_b(mP)\pi }$ and width of the decay channels $Z_b\to h_b(mP)\pi$. To this end, we calculate the mass and decay constants of the $h_b(1P)$ and $h_b(2P)$ mesons. The results obtained are compared with experimental data of the Belle Collaboration.

arXiv comment12 Pages, 5 Figures and 2 Tables

References in corpus (43)

• Observation of a charged charmoniumlike structure in e+e- to pi+pi-J/psi at \sqrt{s}=4.26 GeV
• Multiquark Resonances
• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation of two charged bottomonium-like resonances in Y(5S) decays
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of a charged charmoniumlike structure Z_c(4020) and search for the Z_c(3900) in e+e- to pi+pi-h_c
• $D^{\ast }D\pi$ and $B^{\ast }B\pi$ couplings in QCD
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Observation of a charged charmoniumlike structure in $e^{+}{e}^{-}\to (D^{\ast }{\bar{D}}^{\ast }{)}^{\pm }{\pi }^{\mp }$ at $\sqrt{s}=4.26$GeV
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• Heavy quark spin structure in Z_b resonances
• X(3872) and Other Possible Heavy Molecular States
• Observation of two resonance-like structures in the pi+ chi_c1 mass distribution in exclusive B0-bar --> K- pi+ chi_c1 decays
• $Z_b(10610{)}^{\pm }$ and $Z_b(10650{)}^{\pm }$ as the $B^{\ast }\bar{B}$ and $B^{\ast }{\bar{B}}^{\ast }$ molecular states
• Observation of a new charged charmoniumlike state in B -> J/psi K pi decays
• Bound state nature of the exotic Z_b states
• Possible assignments of the $X(3872)$, $Z_c(3900)$ and $Z_b(10610)$ as axial-vector molecular states
• Radiative transitions from Upsilon(5S) to molecular bottomonium
• An explanation of Belle states Z_b(10610) and Z_b(10650)
• Reanalysis of the $Y(3940)$, $Y(4140)$, $Z_c(4020)$, $Z_c(4025)$ and $Z_b(10650)$ as molecular states with QCD sum rules
• Tetraquark Interpretation of the Charged Bottomonium-like states Z_b^+-(10610) and Z_b^+-(10650) and Implications
• Confirming the molecular nature of the $Z_b(10610)$ and the $Z_b(10650)$
• $Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the ${\rm Y}(5S)$ decays
• Could $Z_b(10610)$ be a $B^{\ast }\bar{B}$ molecular state?
• Study of e+e- => B(*) B(*)-bar pi+- at sqrt(s)=10.866 GeV
• Mass spectra of Zc and Zb exotic states as hadron molecules
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• Strong $Z_c^{+}(3900)\to J/\psi {\pi }^{+};{\eta }_c{\rho }^{+}$ decays in QCD
• Hadron interaction with heavy quarkonia
• Decays of Zb(+) and Zb'(+) as hadronic molecules
• Hidden-Beauty Charged Tetraquarks and Heavy Quark Spin Conservation
• Treating $Z_c(3900)$ and $Z(4430)$ as the ground-state and first radially excited tetraquarks
• General considerations on the nature of $Z_b(10610)$ and $Z_b(10650)$ from their pole positions
• Possible interpretation of the $Z_b$(10610) and $Z_b$(10650) in a chiral quark model
• Charged bottomonium-like states $Z_b(10610)$ and $Z_b(10650)$ and the ${\rm Y}(5S)\to {\rm Y}(2S){\pi }^{+}{\pi }^{-}$ decay
• Width of the exotic $X_b(5568)$ state through its strong decay to $B_s^0{\pi }^{+}$
• Investigating different structures of the Z_{b}(10610) and Z_{b}(10650)
• A model-independent confirmation of the $Z(4430{)}^{-}$ state
• Is $Z_b(10610)$ a Molecular State?
• Exploring the resonances $X(4140)$ and $X(4274)$ through their decay channels
• Line shapes in Υ(5S) \to B^{(*)} \bar{B}^{(*)}πwith Z(10610) and Z(10650) using effective field theory
• Open charm-bottom scalar tetraquarks and their strong decays
• Analysis of the heavy quarkonium states $h_c$ and $h_b$ with QCD sum rules

Cited by in corpus (7)

• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• The line shapes of the $Z_b(10610)$ and $Z_b(10650)$ in the elastic and inelastic channels revisited
• Analysis of the hidden-bottom tetraquark mass spectrum with the QCD sum rules
• Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
• Magnetic dipole moment of $Z_b(10610)$ in light-cone QCD
• The $Z_b$ structures in a constituent quark model coupled-channels calculation
• Analysis of the axialvector $B_c$-like tetraquark states with the QCD sum rules