Publications
Publication Information
| Title | Precision dispersive approaches versus unitarized Chiral Perturbation Theory for the lightest scalar resonances $\sigma$ and $\kappa$. |
| Authors | José Ramón Peláez, Arkaitz Rodas, J. Ruiz de Elvira |
| JLAB number | JLAB-THY-21-3306 |
| LANL number | arXiv:2101.06506 |
| Other number | DOE/OR/23177-5116 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for European Physical Journal Special Topics Volume 2021 Refereed | |
| Publication Abstract: | For several decades, the \sig and \kap resonances have been subject to long-standing debate. Both their existence and properties were in controversy until very recently. In this mini-review we compare model-independent dispersive and analytic techniques versus unitarized Chiral Perturbation Theory when applied to the lightest scalar mesons $\sig$ and $\kap$. Generically, the former have settled the long-standing controversy about the existence of these states, providing a precise determination of their parameters, whereas unitarization of chiral effective theories allow us to understand their nature, spectroscopic classification and dependence on QCD parameters. Here we review in a pedagogical way their uses, advantages and caveats. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1140/epjs/s11734-021-00142-9 |
| Accepted Manuscript: | 2101.06506.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |