Publication
Odd and even partial waves of $ηπ^−$ and $η′π^−$ in $π^−p → η^{(′)}π^−p$ at 191 GeV/c
| dc.contributor.author | COMPASS collaboration (207 authors) | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Nunes, Ana Sofia | |
| 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 | 2019-02-04T04:38:44Z | |
| dc.date.available | 2019-02-04T04:38:44Z | |
| dc.date.issued | 2014-11-30 | |
| dc.date.updated | 2019-02-04T04:38:43Z | |
| dc.description.abstract | Exclusive production of ηπ− and η′π− has been studied with a 191 GeV/c π− beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ( L ) characteristics in the inspected invariant mass range up to 3 GeV/c2 . A striking similarity between the two systems is observed for the L=2,4,6 intensities (scaled by kinematical factors) and the relative phases. The known resonances a2(1320) and a4(2040) are in line with this similarity. In contrast, a strong enhancement of η′π− over ηπ− is found for the L=1,3,5 waves, which carry non- qq¯ quantum numbers. The L=1 intensity peaks at 1.7 GeV/c2 in η′π− and at 1.4 GeV/c2 in ηπ− , the corresponding phase motions with respect to L=2 are different. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B740 (2015) 303-311; DOI 10.1016/j.physletb.2014.11.058 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2014.11.058 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26667 | |
| dc.language.iso | eng | |
| dc.title | Odd and even partial waves of $ηπ^−$ and $η′π^−$ in $π^−p → η^{(′)}π^−p$ at 191 GeV/c | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |