C. C. Kuo, for the Belle Collaboration
Published 2005-03-02, updated 2005-06-15Version 2
A high precision study of the process gamma gamma -> p p-bar has been performed using a data sample of 89/fb collected with the Belle detector at the KEKB e+e- collider. The cross section of p p-bar 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 |cos(theta^*)|<0.6. Production of gamma gamma -> eta_c -> p p-bar is observed and the product of the two-photon width of the eta_c and its branching ratio to p p-bar is determined.
Comments: 20 pages, 9 figures, Fig.1 added, accepted for publication in Phys. Lett. B
Journal: Phys.Lett.B621:41-55,2005
Measurement of the Decay B_s^0 -> D_s^- pi^+ and Evidence for B_s^0 -> D_s^{+/-} K^{-/+} in e+e- Annihilation at sqrt(s)~10.87 GeV
Measurement of charmless $B$ Decays to $ηK^*$ and $ηρ$
Observation of B^0 \to D^{*-} τ^+ ν_τ decay at Belle
