Measurements of the Mass and Full-Width of the $η_c$ Meson
| dc.creator | Bai, J. Z. | |
| dc.date | 2003-01-06 | |
| dc.date.accessioned | 2026-07-07T10:32:13Z | |
| dc.date.available | 2026-07-07T10:32:13Z | |
| dc.description | In a sample of 58 million $J/ψ$ events collected with the BES II detector, the process J/$ψ\toγη_c$ is observed in five different decay channels: $γK^+K^-π^+π^-$, $γπ^+π^-π^+π^-$, $γK^\pm K^0_S π^\mp$ (with $K^0_S\toπ^+π^-$), $γϕϕ$ (with $ϕ\to K^+K^-$) and $γp\bar{p}$. From a combined fit of all five channels, we determine the mass and full-width of $η_c$ to be $m_{η_c}=2977.5\pm1.0 ({stat.})\pm1.2 ({syst.})$ MeV/$c^2$ and $Γ_{η_c} = 17.0\pm3.7 ({stat.})\pm7.4 ({syst.})$ MeV/$c^2$. | |
| dc.description | 9 pages, 2 figures and 4 table. Submitted to Phys. Lett. B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0301004 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0301004 | |
| dc.identifier | Phys.Lett.B555:174-180,2003 | |
| dc.identifier | doi:10.1016/S0370-2693(03)00074-1 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178682 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurements of the Mass and Full-Width of the $η_c$ Meson | |
| dc.type | text |