Measurements of the mass, total width, and two-photon partial width of the eta(c) meson.
| Author | |
|---|---|
| Abstract |
:
Using 13.4 fb(-1) 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 pseudoscalar charmonium in the decay eta(c)-->K(0)(S)K-/+pi(+/-). We have measured the eta(c) mass to be [2980.4+/-2.3 (stat)+/-0.6 (syst)] MeV and its full width as [27.0+/-5.8 (stat)+/-1.4 (syst)] MeV. We have determined the two-photon partial width of the eta(c) meson to be [7.6+/-0.8 (stat)+/-0.4 (syst)+/-2.3 (br)] keV, with the last uncertainty associated with the decay branching fraction. |
| Year of Publication |
:
2000
|
| Journal |
:
Physical review letters
|
| Volume |
:
85
|
| Issue |
:
15
|
| Number of Pages |
:
3095-9
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| Date Published |
:
2000
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| ISSN Number |
:
0031-9007
|
| URL |
:
http://link.aps.org/abstract/PRL/v85/p3095
|
| Short Title |
:
Phys Rev Lett
|
| Download citation |
