Incoherent photoproduction of pseudoscalar mesons off nuclei at forward angles

Understand

Recent advances in the photon tagging facilities together with the novel, high resolution fast calorimetry made possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with a percent level accuracy.

• The extraction of the radiative decay widths, needed for testing the symmetry breaking effects in QCD, from these measurements at small angles is done by the Primakoff method.
• This method requires theoretical treatment of all processes participating in these reactions at the same percent level.
• The most updated description of general processes, including the nuclear coherent amplitude, is done in our previous paper.