Journal
PHYSICAL REVIEW D
Volume 81, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.052010
Keywords
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Funding
- US Department of Energy and National Science Foundation
- Natural Sciences and Engineering Research Council (Canada)
- Commissariat a l'Energie Atomique and Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Foundation for Fundamental Research on Matter (The Netherlands)
- Research Council of Norway
- Ministry of Science and Technology of the Russian Federation
- Ministerio de Educacion y Ciencia (Spain)
- Science and Technology Facilities Council (United Kingdom)
- Marie-Curie IEF program (European Union)
- A.P. Sloan Foundation
- Science and Technology Facilities Council [ST/H000992/1, PP/E000444/1, ST/H001166/1] Funding Source: researchfish
- STFC [ST/K001604/1, ST/H001166/1, ST/H000992/1] Funding Source: UKRI
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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/c(2) and 31.7 +/- 1.2 +/- 0.8 MeV, respectively. We find Gamma(eta(c) -> gamma gamma)B(eta(c) -> KK pi) = 0.374 +/- 0.009 +/- 0.031 keV, and measure the gamma gamma* -> eta(c) transition form factor in the momentum transfer range from 2 to 50 GeV2. The analysis is based on 469 fb(-1) of integrated luminosity collected at PEP-II with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV.
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