Exclusive measurement of coherent η-photoproduction from the deuteron
/ Authors
J. Weiss, P. Achenbach, J. Ahrens, J. Annand, R. Beck, V. Hejny, J. Kellie, V. Kleber, M. Kotulla, B. Krusche
and 10 more authors
V. Kuhr, R. Leukel, V. Metag, V. M. Olmos de Léon, F. Rambo, A. Schmidt, U. Siodlaczek, H. Ströher, F. Wissmann, M. Wolf
/ Abstract
Abstract:Coherent photoproduction of η-mesons from the deuteron has been measured from threshold up to Eγ≈ 750 MeV using the photon spectrometer TAPS at the tagged photon facility at the Mainz microtron MAMI. For the first time, differential coherent cross-sections have been deduced from the coincident detection of the η-meson and the recoil deuteron. A missing-energy analysis was used for the suppression of background events so that a very clean identification of coherent η-photoproduction was achieved. The resulting cross-sections agree with previous experimental results except for angles around 90° in the γd c.m. system where they are smaller. They are compared to various model calculations.
Journal: The European Physical Journal A - Hadrons and Nuclei