Resonances in $J/ψ\to ϕπ^+π^-$ and $ϕK^+K^-$
| dc.creator | Ablikim, M. | |
| dc.date | 2004-10-29 | |
| dc.date | 2004-11-05 | |
| dc.date.accessioned | 2026-07-07T10:28:29Z | |
| dc.date.available | 2026-07-07T10:28:29Z | |
| dc.description | A partial wave analysis is presented of $J/ψ\to ϕπ^+π^-$ and $ϕK^+K^-$ from a sample of 58M $J/ψ$ events in the BES II detector. The $f_0(980)$ is observed clearly in both sets of data, and parameters of the Flatt\' e formula are determined accurately: $M = 965 \pm 8$ (stat) $\pm 6$ (syst) MeV/c$^2$, $g_1 = 165 \pm 10 \pm 15 $ MeV/c$^2$, $g_2/g_1 = 4.21 \pm 0.25 \pm 0.21$. The $ϕππ$ data also exhibit a strong $ππ$ peak centred at $M = 1335$ MeV/c$^2$. It may be fitted with $f_2(1270)$ and a dominant $0^+$ signal made from $f_0(1370)$ interfering with a smaller $f_0(1500)$ component. There is evidence that the $f_0(1370)$ signal is resonant, from interference with $f_2(1270)$. There is also a state in $ππ$ with $M = 1790 ^{+40}_{-30}$ MeV/c$^2$ and $Γ= 270 ^{+60}_{-30}$ MeV/c$^2$; spin 0 is preferred over spin 2. This state, $f_0(1790)$, is distinct from $f_0(1710)$. The $ϕK\bar K$ data contain a strong peak due to $f_2'(1525)$. A shoulder on its upper side may be fitted by interference between $f_0(1500)$ and $f_0(1710)$. | |
| dc.description | 17 pages, 6 figures, 1 table. Submitted to Phys. Lett. B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0411001 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0411001 | |
| dc.identifier | Phys.Lett.B607:243-253,2005 | |
| dc.identifier | doi:10.1016/j.physletb.2004.12.041 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177466 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Resonances in $J/ψ\to ϕπ^+π^-$ and $ϕK^+K^-$ | |
| dc.type | text |