Hyperfine splitting and the experimental candidates for η_b(2S)

Abstract

Predictions for the hyperfine splitting of 2S bottomonia are compared with the two recent experimental candidates for the η_b(2S). The smaller splitting of the Belle state is consistent with unquenched lattice QCD computations, many potential models, and a model-independent relation which works well for charmonia. The larger splitting for the state extracted from CLEO data is inconsistent with most predictions.

8 pages, 1 figure. Journal version with an additional reference added

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Cited by in corpus (8)

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• Phenomenology of $P_c(4380{)}^{+}$, $P_c(4450{)}^{+}$ and related states
• Higher mass bottomonia
• First observation of the hadronic transition ${\rm Y}(4S)\to \eta h_b(1P)$ and new measurement of the $h_b(1P)$ and ${\eta }_b(1S)$ parameters
• Angular momentum coefficients for meson strong decay and unquenched quark models
• Search for Bottomonium States in Exclusive Radiative Upsilon(2S) Decays
• Observation of ${\rm Y}(2S)\to \gamma {\eta }_b(1S)$ decay
• $\mathcal{O}({\alpha }_s)$ corrections to $e^{+}{e}^{-}\to J/\psi +{\eta }_{c2}({\chi }_{c1}^{\prime })$ at $B$ factories