Measurement of the gamma gamma[superscript *]-->eta[subscript c] transition form factor
We study the reaction e+e- -->e+e-eta c, eta c-->KSK±pi∓ and obtain eta c mass and width values 2982.2±0.4±1.6 MeV/c2 and 31.7±1.2±0.8 MeV, respectively. We find Γ(eta c-->γγ)B(eta c-->KK[over-bar]pi)=0.374±0.009±0.031 keV, and measure the γγ*-->eta c transition form factor in the...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/58924 https://orcid.org/0000-0002-8667-5660 |