Abstract
I review recent progress in heavy hadron spectroscopy and from ab-initio Lattice QCD calculations.After motivating lattice calculations for heavy-hadrons by contrasting recent LHCb results charmed and doubly-charmed baryons with lattice predictions, selected resultsfrom scattering calculations for heavy-light mesons and for charmonia are presented.I close with a discussion of recent Lattice QCD predictions of explicitlyexotic doubly-heavy states.
Highlights
In Lattice Quantum Chromodynamics, the action of QCD is regularized by a 4-dimensional Euclidean space-time lattice
An example is given by the flavor physics results collected in the FLAG review [1]
Most Lattice QCD calculations work in the isospin limit, and the light up and down as well as the heavier strange or even light, strange and charm quarks are included in the creation of gauge configurations
Summary
In Lattice Quantum Chromodynamics, the action of QCD is regularized by a 4-dimensional Euclidean space-time lattice. (The simplest of these would be the “disconnected diagrams” arising in the case of an isoscalar meson.) Recent techniques such as the Distillation [7] and Stochastic Distillation (or LapH) [8] methods allow the determination of these diagrams, while at the same time offering a large freedom for the construction of the lattice operators used for the creation and annihilation of the hadrons For heavy quarks, another important ingredient is the development of improved heavy-quark actions (see for example [9, 10]), which allow for reasonably small discretization effects on currently available lattices with a lattice spacing a of roughly 0.05 to 0.12 fm. These results provide an outlook on future Lattice QCD results
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