Couplings of hybrid operators to ground and excited states of bottomonia

Abstract

We analyze the overlap of local color-octet meson operators with the ${\rm Y}$ and the ${\eta }_b$ and their low-lying excited states, especially the first radial excitations. Our analysis is based on NRQCD and includes all terms up to order $v^4$. We use a variety of source and sink operators as a basis for the variational method, which enables us to clearly separate the mass eigenstates and hence to extract the desired amplitudes. The results show the usefulness of the variational method for determining couplings to excited hadronic states.

arXiv comment24 pages, 15 figures, references added, typos fixed, further analysis added

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• Ab Initio Study of Hybrid b-bar-gb Mesons
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Cited by in corpus (14)

• The Physics of the B Factories
• On the generalized eigenvalue method for energies and matrix elements in lattice field theory
• Observation of the bottomonium ground state in the decay Upsilon(3S) -> gamma eta_b
• Higher mass bottomonia
• Evidence for the eta_b(1S) Meson in Radiative Upsilon(2S) Decay
• Spectra and decays of hybrid charmonia
• Excitations of single-beauty hadrons
• Hadron physics potential of future high-luminosity B-factories at the Upsilon(5S) and above
• Angular momentum content of the rho-meson in lattice QCD
• Hyperfine splitting and the experimental candidates for η_b(2S)
• The chiral and angular momentum content of the rho-meson
• Probing light pseudoscalar, axial vector states through ${\eta }_b\to {\tau }^{+}{\tau }^{-}$
• QCD string in excited heavy-light mesons and heavy-quark hybrids
• Determining alpha_s from the hyperfine splitting mUpsilon(1S)-mEta(b)