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Published November 1999 | Published
Journal Article Open

Coherent π^0 photoproduction on the deuteron up to 4 GeV


The differential cross section for ^2H(γ,d)π^0 has been measured at deuteron center-of-mass angles of 90° and 136°. This work reports the first data for this reaction above a photon energy of 1 GeV, and permits a test of the apparent constituent counting rule and reduced nuclear amplitude behavior as observed in elastic ed scattering. Measurements were performed up to a photon energy of 4.0 GeV, and are in good agreement with previous lower energy measurements. Overall, the data are inconsistent with both constituent-counting rule and reduced nuclear amplitude predictions.

Additional Information

© 1999 The American Physical Society. Received 18 March 1999; published 27 September 1999. We acknowledge the outstanding work of the staff of the accelerator division and Hall C at the Thomas Jefferson National Accelerator Facility. This work was supported in part by research grants from the U.S. Department of Energy and the U.S. National Science Foundation.

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