Abstract

The differential cross-section of the reaction γp→ ηp has been measured at the Deutsches Elektronen Synchrotron (DESY) at mean photon energies of 4 and 6 GeV in the momentum transfer range between zero and 1.4 GeV 2. The data show a slight maximum around t=−0.15 GeV 2 and fall off smoothly till t=−1.4 GeV 2. There is no indication of a dip around t=−0.5 GeV 2.

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