Holographic Hadro-Quarkonium

Abstract

We consider the recently suggested model for some resonances near the open charm threshold as bound states of charmonium inside excited light mesons. It is argued in the soft-wall holographic model of QCD that such states of heavy quarkonium necessarily exist at sufficiently large spin of the light meson. The bound state is provided by the dilaton exchange through the 5D bulk. We also argue that the decay of such bound systems into mesons with open heavy flavors due to splitting of the heavy quarkonium can be treated as semiclassical tunneling and is suppressed. This behavior is in agreement with the known relative suppression of the decay of the discussed charmonium-like resonances into channels with D mesons.

11 pages, 1 figure

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Cited by in corpus (13)

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• Four-Quark Hadrons: an Updated Review
• Z_c(3900) - what is inside?
• Employing spin symmetry to disentangle different models for the XYZ states
• Y(4260) and Y(4360) as mixed hadrocharmonium
• X(3872) in the molecular model
• Observation of a resonant structure near the $D_s^{+}{D}_s^{-}$ threshold in the $B^{+}\to D_s^{+}{D}_s^{-}{K}^{+}$ decay
• Status of quarkonia - like negative and positive parity states in a relativistic confinement scheme
• $Z_c(4100)$ and $Z_c(4200)$ as hadrocharmonium
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• Flux-Tube Formation and Holographic Tunneling