Heavy hybrids and tetraquarks in effective field theory
Grup de Fisica Teòrica, Dept. Fisica and IFAE-BIST, Universítat Autònoma de Barcelona, E-OS193 Bellaterra (Barcelona), Spain
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Published online: 13 March 2019
We report on an effective field theory (EFT) description of exotic quarkonia as bound states on the spectrum of hybrid and tetraquarks static energies. We provide expressions for hybrid and tetraquarks 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.
© The Authors, published by EDP Sciences, 2019
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