Measurements of the mass, total width and two photon partial width of the eta(c) meson
Jun, 20009 pages
Published in:
- Phys.Rev.Lett. 85 (2000) 3095-3099
e-Print:
- hep-ex/0006026 [hep-ex]
Report number:
- SLAC-REPRINT-2000-063,
- CLNS-00-1673,
- CLEO-00-09
Experiments:
Citations per year
Abstract: (arXiv)
Using 13.4 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 -> . We have measured the 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 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.Note:
- 9 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS Report-no: CLNS00/1673, CLEO00-9
- electron positron: colliding beams
- electron positron: inelastic scattering
- exchange: two-photon
- photon photon: interaction
- eta/c(2980): photoproduction
- eta/c(2980): mass
- eta/c(2980): width
- eta/c(2980): hadronic decay
- eta/c(2980): radiative decay
- CLEO
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