Aubert, B. and Albert, J. and Chen, E. and Dvoretskii, A. and Hitlin, D. G. and Narsky, I. and Piatenko, T. and Porter, F. C. and Ryd, A. and Samuel, A. (2006) Measurement of the η and η′ transition form factors at q^2=112 GeV^2. Physical Review D, 74 (1). Art. No. 012002. ISSN 0556-2821 http://resolver.caltech.edu/CaltechAUTHORS:20110211-152755863
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We report a study of the processes e^+e^-→ηγ and e^+e^-→η′γ at a center-of-mass energy of 10.58 GeV, using a 232 fb^(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20_(-5)^(+6)ηγ and 50_(-7)^(+8)η′γ events over small backgrounds, and measure the cross sections σ(e^+e^-→ηγ)=4.5_(-1.1)^(+1.2)±0.3 fb and σ(e^+e^-→η′γ)=5.4±0.8±0.3 fb. The corresponding transition form factors at q^2=112 GeV^2 are q^2|F_η(q^2)|=0.229±0.030±0.008 GeV, and q^2|F_η′(q^2)|=0.251±0.019±0.008 GeV, respectively.
|Additional Information:||© 2006 The American Physical Society. Received 6 May 2006; published 10 July 2006. We thank V. L. Chernyak, A. I. Milstein, and Z. K. Silagadze for many fruitful discussions. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the US Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), Institute of High Energy Physics (China), the Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Science and Technology of the Russian Federation, and the Particle Physics and Astronomy Research Council (United Kingdom). Individuals have received support from CONACyT (Mexico), the Marie-Curie IEF (European Union), the A. P. Sloan Foundation, the Research Corporation, and the Alexander von Humboldt Foundation.|
|Classification Code:||PACS: 13.66.Bc, 14.40.Aq, 13.40.Gp|
|Official Citation:||Measurement of the η and η′ transition form factors at q2=112 GeV2 B. Aubert et al. (BABAR Collaboration)|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||14 Feb 2011 20:36|
|Last Modified:||26 Dec 2012 12:55|
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