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A high precision study of the process γγ→pp̄ has been performed using a data sample of 89 fb-1 collected with the Belle detector at the KEKB e+e- collider. The cross section of pp̄ 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 |cosθ*|
Xavier Buffat, Tatiana Pieloni, Javier Barranco Garcia, Claudia Tambasco
Olivier Schneider, Yiming Li, Mingkui Wang, Chao Wang, Donghyun Kim, Xiao Wang, Lei Li