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: |