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.

arXiv comment25 pages, 7 tables, and 12 figures

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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
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• 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