Measurement of the Cross-Section for the Process Gamma-Gamma to Proton-Antiproton at sqrt(s_ee) = 183 - 189 GeV with the OPAL Detector at LEP

Details Measurement of the Cross-Section for the Process Gamma-Gamma to Proton-Antiproton at sqrt(s_ee) = 183 - 189 GeV with the OPAL Detector at LEP Measurement of the Cross-Section for the Process Gamma-Gamma to Proton-Antiproton at sqrt(s_ee) = 183 - 189 GeV with the OPAL Detector at LEP

2003-07-25

arxiv.org/abs/hep-ex/0307066v1

Nuclear Physics B (Proc. Suppl.) 126 (2004) 301-306

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 8 figures, Photon 2003 conference proceedings

Scientific paper

10.1016/S0920-5632(03)02348-X

The exclusive production of proton-antiproton pairs in the collisions of two quasi-real photons has been studied using data taken at sqrt(s_ee) = 183 GeV and 189 GeV with the OPAL detector at LEP. Results are presented for proton-antiproton invariant masses, W, in the range 2.15 < W < 3.95 GeV. The cross-section measurements are compared with previous data and with recent analytic calculations based on the quark-diquark model.

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