Heavy hybrid decays to quarkonia

Abstract

The decay rates of the XYZ exotics discovered in the heavy quarkonium sector are crucial observables for identifying the nature of these states. Based on the framework of nonrelativistic effective field theories, we calculate the rates of semi-inclusive decays of heavy quarkonium hybrids into conventional heavy quarkonia. We compute them at leading and subleading power in the inverse of the heavy-quark mass, extending and updating previous results. We compare our predictions with experimental data of inclusive decay rates for candidates of heavy quarkonium hybrids.

25 pages, 7 tables, and 12 figures

References in corpus (15)

• Precise measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}J/\psi$ cross section at center-of-mass energies from 3.77 to 4.60 GeV
• Hybrid Mesons
• Observation of new resonances decaying to $J/\psi K^{+}$ and $J/\psi \varphi$
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• A New Hadron Spectroscopy
• The Born-Oppenheimer approximation in an effective field theory language
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• Exotic to standard bottomonium transitions
• Bottomonium spectrum in the relativistic flux tube model
• Computation of the quarkonium and meson-meson composition of the ${\rm Y}(nS)$ states and of the new ${\rm Y}(10753)$ Belle resonance from lattice QCD static potentials
• Charmonium and Charmoniumlike States at the BESIII Experiment
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Cited by in corpus (11)

• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
• Observation of a vector charmoniumlike state at 4.7 $\mathrm{GeV}/c^2$ and search for $Z_{cs}$ in $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• Hyperfine splittings of heavy quarkonium hybrids
• Why quarkonium hybrid coupling to two S-wave heavy-light mesons is not suppressed
• Born-Oppenheimer Potentials for $SU(3)$ Gauge Theory
• Unravelling Pentaquarks with Born--Oppenheimer effective theory
• Effect of continuum states on the double-heavy hadron spectra
• Observation of Three Resonant Structures in the Cross Section of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{h}_c$
• Mass spectrum of the hidden-charm hybrid states via the QCD sum rules
• The $B^{-}\to J/\psi {\eta }^{\prime }{K}^{-}$ reaction and the $Y(4710)$ and $K_0^{\ast }(1430)$ contributions
• Hybrid to Quarkonia transitions