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.

12 Pages, 5 Figures and 2 Tables

References in corpus (14)

• Multiquark Resonances
• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• X(3872) and Other Possible Heavy Molecular States
• Observation of a new charged charmoniumlike state in B -> J/psi K pi decays
• Confirming the molecular nature of the $Z_b(10610)$ and the $Z_b(10650)$
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• 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
• Is $Z_b(10610)$ a Molecular State?
• Open charm-bottom scalar tetraquarks and their strong decays

Cited by in corpus (4)

• Analysis of the hidden-bottom tetraquark mass spectrum with the QCD sum rules
• Magnetic dipole moment of $Z_b(10610)$ in light-cone QCD
• Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
• The $Z_b$ structures in a constituent quark model coupled-channels calculation