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

The European Physical Journal C, Dec 2017

The resonance $$Z_b(10610)$$ is investigated as the diquark–antidiquark $$Z_b=[bu][\overline{bd}]$$ state with spin–parity $$J^{P}=1^{+}$$. 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 $$Z_b\Upsilon (nS)\pi \ (n=1,2,3)$$ by applying the QCD light-cone sum rule to compute the corresponding strong couplings $$g_{Z_b\Upsilon (nS)\pi }$$ and widths of the decays $$Z_b \rightarrow \Upsilon (nS)\pi$$. 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 the widths of the decay channels $$Z_b \rightarrow h_{b}(mP)\pi$$. 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.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-017-5421-5.pdf

S. S. Agaev, K. Azizi, H. Sundu. Spectroscopic parameters and decays of the resonance $$Z_b(10610)$$, The European Physical Journal C, 2017, 836, DOI: 10.1140/epjc/s10052-017-5421-5