Publication
New analysis of $\eta\pi$ tensor resonances measured at the COMPASS experiment
| dc.contributor.author | JPAC, COMPASS collaboration (235 authors) | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Nunes, A.S. | |
| dc.contributor.author | Quaresma, M. | |
| dc.contributor.author | Quintans, C. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.contributor.author | Stolarski, M. | |
| dc.date.accessioned | 2019-02-04T13:24:42Z | |
| dc.date.available | 2019-02-04T13:24:42Z | |
| dc.date.issued | 2018-04-10 | |
| dc.date.updated | 2019-02-04T13:24:42Z | |
| dc.description.abstract | We present a new amplitude analysis of the $\eta\pi$ $D$-wave in $\pi^- p\to \eta\pi^- p$ measured by COMPASS. Employing an analytical model based on the principles of the relativistic $S$-matrix, we find two resonances that can be identified with the $a_2(1320)$ and the excited $a_2^\prime(1700)$, and perform a comprehensive analysis of their pole positions. For the mass and width of the $a_2$ we find $M=(1307 \pm 1 \pm 6)$~MeV and $\Gamma=(112 \pm 1 \pm 8)$~MeV, and for the excited state $a_2^\prime$ we obtain $M=(1720 \pm 10 \pm 60)$~MeV and $\Gamma=(280\pm 10 \pm 70)$~MeV, respectively. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B779 (2018) 464-472; DOI 10.1016/j.physletb.2018.01.017 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2018.01.017 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27385 | |
| dc.language.iso | eng | |
| dc.relation | Study of Strongly Interacting Matter | |
| dc.title | New analysis of $\eta\pi$ tensor resonances measured at the COMPASS experiment | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | Study of Strongly Interacting Matter | |
| oaire.awardURI | info:eu-repo/grantAgreement/EC/FP7/283286/EU | |
| oaire.fundingStream | FP7 | |
| project.funder.identifier | http://doi.org/10.13039/501100008530 | |
| project.funder.name | European Commission | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article | |
| relation.isProjectOfPublication | 6b9e675a-0fea-4dd7-ad0c-99afe186e037 | |
| relation.isProjectOfPublication.latestForDiscovery | 6b9e675a-0fea-4dd7-ad0c-99afe186e037 |