| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9861041 | Physics Letters B | 2005 | 15 Pages |
Abstract
A high precision study of the process γγâpp¯ has been performed using a data sample of 89 fbâ1 collected with the Belle detector at the KEKB e+eâ collider. The cross section of pp¯ production has been measured at two-photon center-of-mass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of |cosθâ|<0.6. Production of γγâηcâpp¯ is observed and the product of the two-photon width of the ηc and its branching ratio to pp¯ is determined.
Related Topics
Physical Sciences and Engineering
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Authors
Belle Collaboration Belle Collaboration, C.C. Kuo, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A.M. Bakich, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. BraÄko, D. Zürcher,