Measurement of the cross-sec tion for the process at GeV at LEPThe OPAL Collaboration
(Received: 22 July 2002 / Published online: 24 March 2003 )
The exclusive production of proton-antiproton pairs in the collisions of two quasi-real photons has been studied using data taken at GeV and GeV with the OPAL detector at LEP. Results are presented for invariant masses, W, in the range GeV. The cross-sec tion measurements are compared with previous data and with recent analytic calculations based on the quark-diquark model.
© Società Italiana di Fisica, Springer-Verlag 2003