Heavy hybrids and tetraquarks in effective field theory

Abstract

We report on an effective field theory (EFT) description of exotic quarkonia as bound states on the spectrum of hybrid and tetraquark static energies. We provide expressions for hybrid and tetraquark static energies in terms of Wilson loops. The former have been computed in quenched lattice calculations but the latter are yet unavailable. From the few simulations with dynamical light-quarks we argue that the overall picture from hybrid static energies does not change but additional states, such as heavy meson pairs, need to be considered for a full description. In this EFT framework for quarkonium hybrids, we report on recent results for mixing with standard quarkonium, spin-dependent contributions, and semi-inclusive decays.

arXiv commentInvited plenary talk at the 9th International Workshop on Charm Physics. 8 pages, 3 figures

References in corpus (8)

• Potential NRQCD: an effective theory for heavy quarkonium
• Effective Field Theory for Ultrasoft Momenta in NRQCD and NRQED
• Quark confinement and the bosonic string
• Fine Structure of the QCD String Spectrum
• Hadro-Charmonium
• Gluon excitations of the static quark potential and the hybrid quarkonium spectrum
• The Heavy Quarkonium Spectrum at Order $m{\alpha }_s^5\ln {\alpha }_s$
• Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD

Cited by in corpus (4)

• The $XYZ$ states: experimental and theoretical status and perspectives
• QCD spin effects in the heavy hybrid potentials and spectra
• Nonrelativistic effective field theory for heavy exotic hadrons
• Unravelling Pentaquarks with Born--Oppenheimer effective theory