CLNS 00/1673 CLEO 00-09 Measurements of the Mass, Total Width and Two-photon Partial Width of the ηc Meson
نویسندگان
چکیده
Using 13.4 fb of data collected with the CLEO detector at the Cornell Electron Storage Ring, we have observed 300 events for the two-photon production of ground-state pseudo-scalar charmonium in the decay ηc → K SK π. We have measured the ηc mass to be (2980.4 ± 2.3 (stat) ± 0.6 (sys)) MeV and its full width as (27.0 ± 5.8 (stat) ± 1.4 (sys)) MeV. We have determined the two-photon partial width of the ηc meson to be (7.6 ± 0.8 (stat) ± 0.4 (sys) ± 2.3 (br)) keV, with the last uncertainty associated with the decay branching fraction.
منابع مشابه
0 Measurements of the Mass , Total Width and Two - photon Partial Width of the η c Meson
Using 13.4 fb of data collected with the CLEO detector at the Cornell Electron Storage Ring, we have observed 300 events for the two-photon production of ground-state pseudo-scalar charmonium in the decay ηc → K 0 SK π. We have measured the ηc mass to be (2980.4 ± 2.3 (stat) ± 0.6 (sys)) MeV and its full width as (27.0 ± 5.8 (stat) ± 1.4 (sys)) MeV. We have determined the two-photon partial wid...
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