Exotic Meson Production in the $f_{1}(1285)π^{-}$ System observed in the Reaction $π^{-} p \to ηπ^{+}π^{-}π^{-} p$ at 18 GeV/c
| dc.creator | Kuhn, J. | |
| dc.date | 2004-01-07 | |
| dc.date | 2004-03-01 | |
| dc.date.accessioned | 2026-07-07T11:57:47Z | |
| dc.date.available | 2026-07-07T11:57:47Z | |
| dc.description | This letter reports results from the partial wave analysis of the $π^{-}π^{-}π^{+}η$ final state in $π^{-}p$ collisions at 18GeV/c. Strong evidence is observed for production of two mesons with exotic quantum numbers of spin, parity and charge conjugation, $J^{PC} = 1^{-+}$ in the decay channel $f_{1}(1285)π^{-}$. The mass $M = 1709 \pm 24 \pm 41$ MeV/c^2 and width $Γ= 403 \pm 80 \pm 115$ MeV/c^2 of the first state are consistent with the parameters of the previously observed $π_{1}(1600)$. The second resonance with mass $M = 2001 \pm 30 \pm 92$ MeV/c^2 and width $Γ= 333 \pm 52 \pm 49$ MeV/c^2 agrees very well with predictions from theoretical models. In addition, the presence of $π_{2}(1900)$ is confirmed with mass $M = 2003 \pm 88 \pm 148$ MeV/c^2 and width $Γ= 306 \pm 132 \pm 121$ MeV/c^2 and a new state, $a_{1}(2096)$, is observed with mass $M = 2096 \pm 17 \pm 121$ MeV/c^2 and width $Γ= 451 \pm 41 \pm 81$ MeV/c^2. The decay properties of these last two states are consistent with flux tube model predictions for hybrid mesons with non-exotic quantum numbers. | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0401004 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0401004 | |
| dc.identifier | Phys.Lett.B595:109-117,2004 | |
| dc.identifier | doi:10.1016/j.physletb.2004.05.032 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206002 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Exotic Meson Production in the $f_{1}(1285)π^{-}$ System observed in the Reaction $π^{-} p \to ηπ^{+}π^{-}π^{-} p$ at 18 GeV/c | |
| dc.type | text |