Publications
Publication Information
| Title | Scattering processes and resonances from lattice QCD |
| Authors | Raul Briceno, Jozef Dudek, Ross Young |
| JLAB number | JLAB-THY-17-2495 |
| LANL number | arXiv:1706.06223 |
| Other number | DOE/OR/23177-4283 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Reviews of Modern Physics Volume 90 Issue 02 Page(s) 5001 Refereed | |
| Publication Abstract: | The vast majority of hadrons observed in nature are not stable under the strong interaction, rather they are \emph{resonances} whose existence is deduced from enhancements in the energy dependence of scattering amplitudes. % The study of hadron resonances offers a window into the workings of quantum chromodynamics (QCD) in the low-energy non-perturbative region, and in addition, many probes of the limits of the electroweak sector of the Standard Model consider processes which feature hadron resonances. % From a theoretical standpoint, this is a challenging field: the same dynamics that binds quarks and gluons into hadron resonances also controls their decay into lighter hadrons, so a complete approach to QCD is required. Presently, lattice QCD is the only available tool that provides the required non-perturbative evaluation of hadron observables. % In this article, we review progress in the study of few-hadron reactions in which resonances and bound-states appear using lattice QCD techniques. We describe the leading approach which takes advantage of the periodic finite spatial volume used in lattice QCD calculations to extract scattering amplitudes from the discrete spectrum of QCD eigenstates in a box. % We explain how from explicit lattice QCD calculations, one can rigorously garner information about a variety of resonance properties, including their masses, widths, decay couplings, and form factors. % The challenges which currently limit the field are discussed along with the steps being taken to resolve them. |
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| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/RevModPhys.90.025001 |
| Accepted Manuscript: | JLAB-THY-17-2495.pdf embargoed final, peer reviewed, accepted manuscript |
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