Abstract
The ratio R = (d σ/d t)( γd → ( π 0n)p)/(d σ/d t)( γd → ( π 0p)n), was measured at the Deutsches Elektronen-Synchrotron DESY, Hamburg at a mean photon energy of 4.0 GeV in the four-momentum transfer range between t = − 0.2 (GeV/ c) 2 and t = − 1.2 (GeV/ c) 2 in steps of approximately 0.08 (GeV/ c) 2. The ratio R is less than 1 up to t = − 0.9 (GeV/ c) 2 and shows a broad minimum around t = − 0.6 (GeV/ c) 2. Corrections for nuclear effects in the deuterium were not applied but are shown to be small.
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