Publications
Publication Information
| Title | The pi-f0(500) decay of the a1(1260) |
| Authors | Raquel Molina Peralta, Wei-Hong Liang, Eulogio Oset |
| JLAB number | JLAB-THY-21-3464 |
| LANL number | arXiv:2107.07439 |
| Other number | DOE/OR/23177-5284 |
| 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 C Volume 81 Page(s) 782 Refereed | |
| Publication Abstract: | We evaluate the a1(1260) -> pi sigma (f0(500)) decay width from the perspective that the a1(1260) resonance is dynamically generated from the pseudoscalar-vector interaction and the sigma arises from the pseudoscalar-pseudoscalar interaction. A triangle mechanism with a1(1260)->rho pi followed by rho->pi pi and a fusion of two pions within the loop to produce the sigma provides the mechanism for this decay under these assumptions for the nature of the two resonances. We obtain widths of the order of 13?22 MeV. Present experimental results differ substantially from each other, suggesting that extra efforts should be devoted to the precise extraction of this important partial decay width,which should provide valuable information on the nature of the axial vector and scalar meson resonances and help clarify the role of the pi-sigma channel in recent lattice QCD calculations of the a1. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1140/epjc/s10052-021-09574-y |
| Accepted Manuscript: | Molina2021_Article_ThePiF0500¿f0500DecayOfTheA112.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |