The XYZ mesons: what they aren't

Abstract

I discuss the properties of some representative $XYZ$ mesons in the context of the most commonly proposed models for their underlying nature.

8 pages, 6 figures, write-up of talks given at Charm2018 in Novosibirsk, May 2018 and New Physics in the Flavor Sector Workshop in Nagoya, November 2018. To appear in the Charm2018 proceedings

References in corpus (7)

• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Excited and exotic charmonium spectroscopy from lattice QCD
• Hadro-Charmonium
• 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
• Evidence of Two Resonant Structures in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{h}_c$
• Exotic tetraquark states with the $qq\bar{Q}\bar{Q}$ configuration
• Charged charmonium-like Z+(4430) from rescattering in conventional B decays

Cited by in corpus (2)

• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model
• Comment on the X(3915) nonstandard hadron candidate